Codeforces Round #470 (rated, Div. 2, based on VK Cup 2018 Round 1) C.Producing Snow
题意
每天有体积为Vi的一堆雪,所有存在的雪每天都会融化Ti体积,求出每天具体融化的雪的体积数。
分析
对于第i天的雪堆,不妨假设其从一开始就存在,那么它的初始体积就为V[i]+T[1..i-1],在第i天则需要融化T[i]体积,若T[1....i]>=V[i]+T[1...i-1],那么这堆雪就融化完了,融化的体积为V[i]+T[1..i-1] - T[1...i-1];否则就为T[i]。用个优先队列来维护,由于默认是数值大的优先,所以实际处理中添加一个负号。
#include<iostream>
#include<cstdio>
#include<cmath>
#include<cstdlib>
#include<algorithm>
#include<cstring>
#include <queue>
#include <vector>
#include<bitset>
#include<map>
#include<deque>
using namespace std;
typedef long long LL;
const int maxn = 1e5+;
const int mod = +;
typedef pair<int,int> pii;
#define X first
#define Y second
#define pb push_back
//#define mp make_pair
#define ms(a,b) memset(a,b,sizeof(a))
const int inf = 0x3f3f3f3f;
#define lson l,m,2*rt
#define rson m+1,r,2*rt+1 priority_queue<long long> que;
int V[maxn];
int main(){
int n;
scanf("%d",&n);
for(int i=;i<n;i++){
scanf("%d",&V[i]);
}
long long sumT = ;
int T;
for(int i=;i<n;i++){
scanf("%d",&T*
que.push(-(V[i]+sumT));
long long ans=;
while(!que.empty() && que.top() >= -(sumT+T) ){
ans -= que.top()+sumT;
que.pop();
}
sumT += T;
ans += 1LL*T*que.size();
printf("%lld ",ans);
}
return ;
}
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