[HDOJ1827]Summer Holiday（强连通分量，缩点）

题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=1827

缩点后统计入度和当前强连通分量中最小花费，然后记录入度为0的点的个数和花费和就行了。

 /*
 ━━━━━┒ギリギリ♂ eye！
 ┓┏┓┏┓┃キリキリ♂ mind！
 ┛┗┛┗┛┃＼○／
 ┓┏┓┏┓┃ /
 ┛┗┛┗┛┃ノ)
 ┓┏┓┏┓┃
 ┛┗┛┗┛┃
 ┓┏┓┏┓┃
 ┛┗┛┗┛┃
 ┓┏┓┏┓┃
 ┛┗┛┗┛┃
 ┓┏┓┏┓┃
 ┃┃┃┃┃┃
 ┻┻┻┻┻┻
 */
 #include <algorithm>
 #include <iostream>
 #include <iomanip>
 #include <cstring>
 #include <climits>
 #include <complex>
 #include <fstream>
 #include <cassert>
 #include <cstdio>
 #include <bitset>
 #include <vector>
 #include <deque>
 #include <queue>
 #include <stack>
 #include <ctime>
 #include <set>
 #include <map>
 #include <cmath>
 using namespace std;
 #define fr first
 #define sc second
 #define cl clear
 #define BUG puts("here!!!")
 #define W(a) while(a--)
 #define pb(a) push_back(a)
 #define Rint(a) scanf("%d", &a)
 #define Rll(a) scanf("%I64d", &a)
 #define Rs(a) scanf("%s", a)
 #define Cin(a) cin >> a
 #define FRead() freopen("in", "r", stdin)
 #define FWrite() freopen("out", "w", stdout)
 #define Rep(i, len) for(int i = 0; i < (len); i++)
 #define For(i, a, len) for(int i = (a); i < (len); i++)
 #define Cls(a) memset((a), 0, sizeof(a))
 #define Clr(a, x) memset((a), (x), sizeof(a))
 #define Full(a) memset((a), 0x7f7f, sizeof(a))
 #define pi 3.14159265359
 #define RT return
 #define lowbit(x) x & (-x)
 #define onenum(x) __builtin_popcount(x)
 typedef long long LL;
 typedef long double LD;
 typedef unsigned long long ULL;
 typedef pair<int, int> pii;
 typedef pair<string, int> psi;
 typedef map<string, int> msi;
 typedef vector<int> vi;
 typedef vector<LL> vl;
 typedef vector<vl> vvl;
 typedef vector<bool> vb;

 const int maxn = ;
 const int maxm = ;
 const int inf = 0x7f7f7f;
 int n, m;
 vector<int> G[maxn];
 int vis[maxn][maxn];
 int w[maxn];
 int dfn[maxn], low[maxn], idx;
 int st[maxn], top;
 int belong[maxn], bcnt;
 int in[maxn], out[maxn];
 int cost[maxn];

 void tarjan(int u) {
     int v = u;
     dfn[u] = low[u] = ++idx;
     vis[][u] = ; st[++top] = u;
     Rep(i, G[u].size()) {
         v = G[u][i];
         if(!dfn[v]) {
             tarjan(v);
             low[u] = min(low[u], low[v]);
         }
         else if(vis[][v]) low[u] = min(low[u], dfn[v]);
     }
     if(low[u] == dfn[u]) {
         bcnt++;
         do {
             v = st[top--];
             vis[][v] = ;
             belong[v] = bcnt;
         } while(u != v);
     }
 }

 int main() {
     // FRead();
     int u, v;
     while(~Rint(n) && ~Rint(m)) {
         Cls(dfn); Cls(low); Cls(w);
         Cls(st); Cls(vis); top = ;
         Cls(belong); bcnt = ; idx = ;
         Cls(in); Cls(out);
         For(i, , n+) {
             Rint(w[i]);
             G[i].cl();
             cost[i] = inf;
         }
         Rep(i, m) {
             Rint(u); Rint(v);
             G[u].pb(v);
         }
         For(i, , n+) if(!dfn[i]) tarjan(i);
         Cls(vis);
         For(u, , n+) {
             cost[belong[u]] = min(cost[belong[u]], w[u]);
             Rep(i, G[u].size()) {
                 int v = G[u][i];
                 if(belong[u] == belong[v]) continue;
                 in[belong[v]]++;
                 out[belong[u]]++;
             }
         }
         int ret1 = , ret2 = ;
         For(i, , bcnt+) {
             if(in[i] == ) {
                 ret1++;
                 ret2 += cost[i];
             }
         }
         printf("%d %d\n", ret1, ret2);
     }
     RT ;
 }