gym/101873/GCPC2017
题目链接:https://codeforces.com/gym/101873
C. Joyride
记忆化搜索形式的dp
#include <algorithm>
#include <iterator>
#include <iostream>
#include <cstring>
#include <cstdlib>
#include <iomanip>
#include <bitset>
#include <cctype>
#include <cstdio>
#include <string>
#include <vector>
#include <stack>
#include <cmath>
#include <queue>
#include <list>
#include <map>
#include <set>
#include <cassert>
//#include <unordered_map>
/* ⊂_ヽ
\\ Λ_Λ 来了老弟
\('ㅅ')
> ⌒ヽ
/ へ\
/ / \\
レ ノ ヽ_つ
/ /
/ /|
( (ヽ
| |、\
| 丿 \ ⌒)
| | ) /
'ノ ) Lノ */ using namespace std;
#define lson (l , mid , rt << 1)
#define rson (mid + 1 , r , rt << 1 | 1)
#define debug(x) cerr << #x << " = " << x << "\n";
#define pb push_back
#define pq priority_queue typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
//typedef __int128 bll;
typedef pair<ll ,ll > pll;
typedef pair<int ,int > pii;
typedef pair<int,pii> p3; //priority_queue<int> q;//这是一个大根堆q
//priority_queue<int,vector<int>,greater<int> >q;//这是一个小根堆q
#define fi first
#define se second
//#define endl '\n' #define boost ios::sync_with_stdio(false);cin.tie(0)
#define rep(a, b, c) for(int a = (b); a <= (c); ++ a)
#define max3(a,b,c) max(max(a,b), c);
#define min3(a,b,c) min(min(a,b), c); const ll oo = 1ll<<;
const ll mos = 0x7FFFFFFF; //
const ll nmos = 0x80000000; //-2147483648
const int inf = 0x3f3f3f3f;
const ll inff = 0x3f3f3f3f3f3f3f3f; //
const int mod = ;
const double esp = 1e-;
const double PI=acos(-1.0);
const double PHI=0.61803399; //黄金分割点
const double tPHI=0.38196601; template<typename T>
inline T read(T&x){
x=;int f=;char ch=getchar();
while (ch<''||ch>'') f|=(ch=='-'),ch=getchar();
while (ch>=''&&ch<='') x=x*+ch-'',ch=getchar();
return x=f?-x:x;
} inline void cmax(int &x,int y){if(x<y)x=y;}
inline void cmax(ll &x,ll y){if(x<y)x=y;}
inline void cmin(int &x,int y){if(x>y)x=y;}
inline void cmin(ll &x,ll y){if(x>y)x=y;}
#define MODmul(a, b) ((a*b >= mod) ? ((a*b)%mod + 2*mod) : (a*b))
#define MODadd(a, b) ((a+b >= mod) ? ((a+b)%mod + 2*mod) : (a+b)) /*-----------------------showtime----------------------*/
const int maxn = 1e3+;
int dp[maxn][maxn];
vector<int>mp[maxn];
int x,n,m,T;
int tim[maxn],cost[maxn];
int dfs(int u,int t){
if(t > x) return inf;
if(dp[u][t]!=-) return dp[u][t];
if(u == && t == x) return dp[u][t] = ;
dp[u][t] = inf;
for(int i=; i<mp[u].size(); i++){
int v = mp[u][i];
dp[u][t] = min(dp[u][t], dfs(v, t + T + tim[v]) + cost[v]);
}
dp[u][t] = min(dp[u][t], dfs(u, t+tim[u]) + cost[u]);
return dp[u][t];
}
int main(){
memset(dp, -, sizeof(dp));
scanf("%d", &x);
scanf("%d%d%d", &n, &m, &T);
rep(i, , m) {
int u,v; scanf("%d%d", &u, &v);
mp[u].pb(v);
mp[v].pb(u);
}
rep(i, , n) {
scanf("%d%d", &tim[i], &cost[i]);
}
int ans = dfs(, tim[]) + cost[];
if(ans < inf) printf("%d\n", ans);
else puts("It is a trap.");
return ;
}
E.Perpetuum Mobile
找正环,由于是乘法,所以用log变成加法,还有这题其实是看爱因斯坦那句话,和他助手说的没什么关系,所以要找一个环,环上的乘积大于1,即log >0。于是用spfa判正环就行了。
#include <algorithm>
#include <iterator>
#include <iostream>
#include <cstring>
#include <cstdlib>
#include <iomanip>
#include <bitset>
#include <cctype>
#include <cstdio>
#include <string>
#include <vector>
#include <stack>
#include <cmath>
#include <queue>
#include <list>
#include <map>
#include <set>
#include <cassert>
//#include <unordered_map>
/* ⊂_ヽ
\\ Λ_Λ 来了老弟
\('ㅅ')
> ⌒ヽ
/ へ\
/ / \\
レ ノ ヽ_つ
/ /
/ /|
( (ヽ
| |、\
| 丿 \ ⌒)
| | ) /
'ノ ) Lノ */ using namespace std;
#define lson (l , mid , rt << 1)
#define rson (mid + 1 , r , rt << 1 | 1)
#define debug(x) cerr << #x << " = " << x << "\n";
#define pb push_back
#define pq priority_queue typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
//typedef __int128 bll;
typedef pair<ll ,ll > pll;
typedef pair<int ,int > pii;
typedef pair<int,pii> p3; //priority_queue<int> q;//这是一个大根堆q
//priority_queue<int,vector<int>,greater<int> >q;//这是一个小根堆q
#define fi first
#define se second
//#define endl '\n' #define boost ios::sync_with_stdio(false);cin.tie(0)
#define rep(a, b, c) for(int a = (b); a <= (c); ++ a)
#define max3(a,b,c) max(max(a,b), c);
#define min3(a,b,c) min(min(a,b), c); const ll oo = 1ll<<;
const ll mos = 0x7FFFFFFF; //
const ll nmos = 0x80000000; //-2147483648
const int inf = 0x3f3f3f3f;
const ll inff = 0x3f3f3f3f3f3f3f3f; //
const int mod = ;
const double esp = 1e-;
const double PI=acos(-1.0);
const double PHI=0.61803399; //黄金分割点
const double tPHI=0.38196601; template<typename T>
inline T read(T&x){
x=;int f=;char ch=getchar();
while (ch<''||ch>'') f|=(ch=='-'),ch=getchar();
while (ch>=''&&ch<='') x=x*+ch-'',ch=getchar();
return x=f?-x:x;
} inline void cmax(int &x,int y){if(x<y)x=y;}
inline void cmax(ll &x,ll y){if(x<y)x=y;}
inline void cmin(int &x,int y){if(x>y)x=y;}
inline void cmin(ll &x,ll y){if(x>y)x=y;}
#define MODmul(a, b) ((a*b >= mod) ? ((a*b)%mod + 2*mod) : (a*b))
#define MODadd(a, b) ((a+b >= mod) ? ((a+b)%mod + 2*mod) : (a+b)) /*-----------------------showtime----------------------*/
typedef pair<int,double> pid;
const int maxn = 1e3+;
vector<pid>mp[maxn]; int vis[maxn];
double dis[maxn];
queue<int>que;
bool spfa(int u){
vis[u] = true;
for(int i=; i<mp[u].size(); i++){
pid tmp = mp[u][i];
int v = tmp.fi;
double w = tmp.se;
if(dis[v] < dis[u] + w){
dis[v] = dis[u] + w;
if(vis[v]) return true;
if(spfa(v)) return true;
}
}
vis[u] = false;
return false;
}
int main(){
int n,m;
scanf("%d%d", &n, &m);
rep(i, , m) {
int u,v; double e;
scanf("%d%d%lf", &u, &v, &e);
mp[u].pb(pid(v, log(e)));
}
for (int i = ; i <= n; ++i) if(spfa(i)) return *puts("inadmissible");
puts("admissible");
return ;
}
H - Ratatoskr
枚举每个点作为根节点的最大深度,如果这个节点原本就有乌鸦,就只能考虑松鼠所在子树的深度,如果这个节点原本没有乌鸦,就只用考虑这棵树的深度
#include <algorithm>
#include <iterator>
#include <iostream>
#include <cstring>
#include <cstdlib>
#include <iomanip>
#include <bitset>
#include <cctype>
#include <cstdio>
#include <string>
#include <vector>
#include <stack>
#include <cmath>
#include <queue>
#include <list>
#include <map>
#include <set>
#include <cassert>
//#include <unordered_map>
/* ⊂_ヽ
\\ Λ_Λ 来了老弟
\('ㅅ')
> ⌒ヽ
/ へ\
/ / \\
レ ノ ヽ_つ
/ /
/ /|
( (ヽ
| |、\
| 丿 \ ⌒)
| | ) /
'ノ ) Lノ */ using namespace std;
#define lson (l , mid , rt << 1)
#define rson (mid + 1 , r , rt << 1 | 1)
#define debug(x) cerr << #x << " = " << x << "\n";
#define pb push_back
#define pq priority_queue typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
//typedef __int128 bll;
typedef pair<ll ,ll > pll;
typedef pair<int ,int > pii;
typedef pair<int,pii> p3; //priority_queue<int> q;//这是一个大根堆q
//priority_queue<int,vector<int>,greater<int> >q;//这是一个小根堆q
#define fi first
#define se second
//#define endl '\n' #define boost ios::sync_with_stdio(false);cin.tie(0)
#define rep(a, b, c) for(int a = (b); a <= (c); ++ a)
#define max3(a,b,c) max(max(a,b), c);
#define min3(a,b,c) min(min(a,b), c); const ll oo = 1ll<<;
const ll mos = 0x7FFFFFFF; //
const ll nmos = 0x80000000; //-2147483648
const int inf = 0x3f3f3f3f;
const ll inff = 0x3f3f3f3f3f3f3f3f; //
const int mod = ;
const double esp = 1e-;
const double PI=acos(-1.0);
const double PHI=0.61803399; //黄金分割点
const double tPHI=0.38196601; template<typename T>
inline T read(T&x){
x=;int f=;char ch=getchar();
while (ch<''||ch>'') f|=(ch=='-'),ch=getchar();
while (ch>=''&&ch<='') x=x*+ch-'',ch=getchar();
return x=f?-x:x;
} inline void cmax(int &x,int y){if(x<y)x=y;}
inline void cmax(ll &x,ll y){if(x<y)x=y;}
inline void cmin(int &x,int y){if(x>y)x=y;}
inline void cmin(ll &x,ll y){if(x>y)x=y;}
#define MODmul(a, b) ((a*b >= mod) ? ((a*b)%mod + 2*mod) : (a*b))
#define MODadd(a, b) ((a+b >= mod) ? ((a+b)%mod + 2*mod) : (a+b)) /*-----------------------showtime----------------------*/
const int maxn = ;
vector<int>mp[maxn];
int dp[maxn],vis[maxn];
int s,b1,b2,n;
void dfs(int u,int fa){
dp[u] = ;
if(u == s) vis[u] = ;
for(int i=; i<mp[u].size(); i++){
int v = mp[u][i];
if(v == fa) continue;
dfs(v, u);
dp[u] = max(dp[u], dp[v] + );
if(vis[v]) vis[u] = ;
}
}
int main(){
scanf("%d%d%d%d", &n, &s, &b1, &b2);
rep(i, , n-) {
int u,v; scanf("%d%d", &u, &v);
mp[u].pb(v); mp[v].pb(u);
}
int ans = inf;
for(int i=; i<=n; i++)
{
if(i == b1 || i ==b2){
memset(vis, , sizeof(vis));
dfs(i, -); for(int j=; j<mp[i].size(); j++) {
int v = mp[i][j];
if(vis[v]) ans = min(ans, dp[v]);
}
}
else {
dfs(i, -);
ans = min(ans,dp[i]);
}
}
printf("%d\n", ans);
return ;
}
J-Word Clock
状压搜索,注意dfs的次序,还有就是只要关了同步,就不能用scanf
#include <algorithm>
#include <iterator>
#include <iostream>
#include <cstring>
#include <cstdlib>
#include <iomanip>
#include <bitset>
#include <cctype>
#include <cstdio>
#include <string>
#include <vector>
#include <stack>
#include <cmath>
#include <queue>
#include <list>
#include <map>
#include <set>
#include <cassert> /* ⊂_ヽ
\\ Λ_Λ 来了老弟
\('ㅅ')
> ⌒ヽ
/ へ\
/ / \\
レ ノ ヽ_つ
/ /
/ /|
( (ヽ
| |、\
| 丿 \ ⌒)
| | ) /
'ノ ) Lノ */ using namespace std;
#define lson (l , mid , rt << 1)
#define rson (mid + 1 , r , rt << 1 | 1)
#define debug(x) cerr << #x << " = " << x << "\n";
#define pb push_back
#define pq priority_queue typedef long long ll;
typedef unsigned long long ull;
//typedef __int128 bll;
typedef pair<ll ,ll > pll;
typedef pair<int ,int > pii;
typedef pair<int,pii> p3; //priority_queue<int> q;//这是一个大根堆q
//priority_queue<int,vector<int>,greater<int> >q;//这是一个小根堆q
#define fi first
#define se second
//#define endl '\n' #define boost ios::sync_with_stdio(false);cin.tie(0)
#define rep(a, b, c) for(int a = (b); a <= (c); ++ a)
#define max3(a,b,c) max(max(a,b), c);
#define min3(a,b,c) min(min(a,b), c); const ll oo = 1ll<<;
const ll mos = 0x7FFFFFFF; //
const ll nmos = 0x80000000; //-2147483648
const int inf = 0x3f3f3f3f;
const ll inff = 0x3f3f3f3f3f3f3f3f; //
const int mod = 1e9+;
const double esp = 1e-;
const double PI=acos(-1.0);
const double PHI=0.61803399; //黄金分割点
const double tPHI=0.38196601; template<typename T>
inline T read(T&x){
x=;int f=;char ch=getchar();
while (ch<''||ch>'') f|=(ch=='-'),ch=getchar();
while (ch>=''&&ch<='') x=x*+ch-'',ch=getchar();
return x=f?-x:x;
} inline void cmax(int &x,int y){if(x<y)x=y;}
inline void cmax(ll &x,ll y){if(x<y)x=y;}
inline void cmin(int &x,int y){if(x>y)x=y;}
inline void cmin(ll &x,ll y){if(x>y)x=y;} /*-----------------------showtime----------------------*/
int n,h,w;
string str[],t[];
pii dp[][<<],nxt[][<<];
int dis[][]; pii dfs(int u,int state){
if(dp[u][state].fi != - && dp[u][state].se != -) return dp[u][state];
if(state == (<<n) - ) return dp[u][state] = pii(,t[u].length());
pii ans = pii(inf, inf); for(int i=; i<=n; i++){
if(!(state & ( << (i-)))) {
pii tmp; tmp = dfs(i, state | (<<(i-))); int he,wi;
int cen = tmp.fi;
if(tmp.se + dis[u][i] > w) {
he = tmp.fi + ;
wi = t[u].length();
}
else {
he = tmp.fi;
wi = tmp.se + dis[u][i];
} if(he < ans.fi || (he==ans.fi && ans.se > wi)) {
ans.fi = he; ans.se = wi;
nxt[u][state] = pii(i, cen);
}
}
}
return dp[u][state] = ans;
}
bool cmp(string a,string b){
return a.length() < b.length();
}
vector<int> vec[];
int main(){
//scanf("%d%d%d", &h, &w, &n);
boost;
cin>>h>>w>>n;
memset(dis, , sizeof(dis));
memset(dp, -, sizeof(dp));
int sum = ; for(int i=; i<=n; i++) cin>>str[i],sum+=str[i].length();
sort(str+, str++n, cmp);
int tot = ;
for(int i=; i<=n; i++){
if(str[i].length() > w) {
puts("impossible");
return ;
}
int flag = ;
for(int j=i+; j<=n; j++){
if(str[j].find(str[i]) != string::npos) flag = ;
}
if(flag) t[++tot] = str[i];
}
n = tot; for(int i=; i<=n; i++) {
for(int j=; j<=n; j++){
int l1 = t[i].length(), l2 = t[j].length();
int len = min(l1, l2);
for(int k=; k<=len; k++){
if(t[i].substr(l1-k,k) ==t[j].substr(, k)) dis[i][j] = l1 - k;
}
}
} pii tmp = dfs(, );
// cout<<tmp.fi<<" , "<<tmp.se<<endl;
if(tmp.fi>h || tmp.se > w) return *puts("impossible"); int st = ,u = ;
while(st < (<<n) - ) {
int id = nxt[u][st].fi;
// cout<<id<<" "<<nxt[u][st].se<<endl;
vec[nxt[u][st].se].pb(id);
u = id;
st |= ( << (id - ));
} for(int i=; i<=h; i++) {
string ans = "";
for(int j=; j<vec[i].size(); j++){
string tmp = t[vec[i][j]];
int l1 = ans.length(),l2 = tmp.length();
int len = min(l1, l2),q;
for(int k=; k<=len; k++){
if(ans.substr(l1-k,k) ==tmp.substr(, k)) q = k;
}
for(int k=q; k<l2; k++) ans += tmp[k];
}
while(ans.length() < w) ans += "A";
cout<<ans<<endl;
} return ;
} /*
5 10 12
ONE TWO THREE FOUR FIVE SIX SEVEN EIGHT NINE TEN ELEVEN TWELVE
5 10 12
UNO DUE TRE QUATTRO CINQUE SEI SETTE OTTO NOVE DIECI UNDICI DODICI
*/
gym/101873/GCPC2017的更多相关文章
- gym 101873
题还没补完 以下是牢骚:删了 现在只有六个...太恐怖了,我发现四星场我连300人的题都不会啊. C:最短路加一维状态就好了叭..嗯,一开始没看到输出的那句话 那个 "."也要输 ...
- Gym 101873F Plug It In(二分图匹配)
题目链接:http://codeforces.com/gym/101873/problem/F 题意:有n个插孔,m个机器,和一个插板,一个插孔可以连接一个机器,插板可以使一个插孔连接三个机器,找到最 ...
- Gym 101873C - Joyride - [最短路变形][优先队列优化Dijkstra]
题目链接:http://codeforces.com/gym/101873/problem/C 题意: 这是七月的又一个阳光灿烂的日子,你决定和你的小女儿一起度过快乐的一天.因为她真的很喜欢隔壁镇上的 ...
- Gym 101873D - Pants On Fire - [warshall算法求传递闭包]
题目链接:http://codeforces.com/gym/101873/problem/D 题意: 给出 $n$ 个事实,表述为 "XXX are worse than YYY" ...
- Gym 101873G - Water Testing - [皮克定理]
题目链接:http://codeforces.com/gym/101873/problem/G 题意: 在点阵上,给出 $N$ 个点的坐标(全部都是在格点上),将它们按顺序连接可以构成一个多边形,求该 ...
- Gym 101873I - Uberwatch - [DP]
题目链接:http://codeforces.com/gym/101873/problem/I 题意: 给出 $n(1 \le n \le 300000)$ 个单位时间,每个单位时间给出一个 $x_i ...
- Gym 101873K - You Are Fired - [贪心水题]
题目链接:http://codeforces.com/gym/101873/problem/K 题意: 现在给出 $n(1 \le n \le 1e4)$ 个员工,最多可以裁员 $k$ 人,名字为 $ ...
- codeforces gym #101873B. Buildings(Polya定理)
参考博客: https://blog.csdn.net/liangzhaoyang1/article/details/72639208 题目链接: https://codeforces.com/gym ...
- Joyride (spaf)
题目链接:https://codeforces.com/gym/101873/problem/C spaf的复杂度有点迷,按道理来说,一个简单的spaf在这题的复杂度是1e9,所以不敢写,然后用优先队 ...
随机推荐
- 并发编程之Java内存模型
在介绍Java内存模型之前,先来了解一下为什么要有内存模型,以及内存模型是什么.然后我们基于对内存模型的了解,学习Java内存模型以及并发编程的三大特性. 为什么要有内存模型 在计算机中,所有的运算操 ...
- JS 自执行函数
由于自己js基础知识薄弱,很多js的知识还没有掌握,所以接下来会经常写一些关于js基础知识的博客,也算给自己提个醒吧. js自执行函数,听到这个名字,首先会联想到函数.接下来,我来定义一个函数: fu ...
- umask 默认权限控制和特殊权限
权限简单介绍: 在Linux中,创建目录或者文件之后总会有默认的权限.共9个,分为三组.分别代表u.g.o(属主.属组.其他用户).r.w.x 也代表各自的权限. r:读 在文件中的权限代表次文件 ...
- 初试kafka消息队列中间件一 (只适合初学者哈)
初试kafka消息队列中间件一 今天闲来有点无聊,然后就看了一下关于消息中间件的资料, 简单一点的理解哈,网上都说的太高大上档次了,字面意思都想半天: 也就是用作消息通知,比如你想告诉某某你喜欢他,或 ...
- Redis的分布式和主备配置调研
目前Redis实现集群的方法主要是采用一致性哈稀分片(Shard),将不同的key分配到不同的redis server上,达到横向扩展的目的. 对于一致性哈稀分片的算法,Jedis-2.0.0已经提供 ...
- CodeForces 939F Cutlet
洛谷题目页面传送门 & CodeForces题目页面传送门 题意见洛谷里的翻译. 这是一道毒瘤的div. 2 F,我是不可能比赛的时候做出来的... (以下设两面都要煎\(n\)分钟,有\(m ...
- 记录一次Git解决CONFLICT冲突
目录 记录一次Git解决CONFLICT冲突 1.CONFLICT产生的原因 2.Git正确的LIANGZHONG 使用流程 2.1 暂存,拉取,恢复暂存,合并(如果有冲突),提交,推送 2.2 将本 ...
- 程序员的专属微信公众号编辑器:定制 Markdown 转 HTML
效果(Gif) 点击我查看 仓库地址 https://github.com/cdk8s/cdk8s-markdown-to-html https://gitee.com/cdk8s/cdk8s-mar ...
- Django上线部署之Apache
环境: 1.Windows Server 2016 Datacenter 64位 2.SQL Server 2016 Enterprise 64位 3.Python 3.6.0 64位 4.admin ...
- git 技术栈
之前用的都是svn ,git还是要了解的,万一哪天要用了呢