本人排序+贪心搞定

计算时间有问题 （因为本人瞎写）

代码：

#include<bits/stdc++.h>
using namespace std;
int a[6000];
int mp[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
int mr[13]={0,31,29,31,30,31,30,31,31,30,31,30,31};
int isrun(int y)
{
	if(y%4==0&&y%100!=0)return 1;
	else if(y%400==0)return 1;
	else return 0;
}
int main()
{
	int n;
	unsigned long long time=0;
	int ans=0;
	cin>>n;
	for(int i=1;i<=n;i++)cin>>a[i];
	int y1,m1,d1,h1,M1;
	int y2,m2,d2,h2,M2;
	char c;
	cin>>y1>>c>>m1>>c>>d1>>c>>h1>>c>>M1;
	cin>>y2>>c>>m2>>c>>d2>>c>>h2>>c>>M2;
	for(int i=y1;i<=y2;i++)
	{
		if(isrun(i)==1)time+=366*24*60;
		else time+=365*24*60;
	}
	for(int i=m1;i<=m2;i++)
	{
		if(isrun(i)==1)time+=mr[i]*24*60;
		else time+=mp[i]*24*60;
	}
	for(int i=d1;i<=d2;i++)
	{
		time+=24*60;
	}
	for(int i=h1;i<=h2;i++)
	{
		time+=60;
	}
	for(int i=M1;i<=M2;i++)
	{
		time++;
	}
	sort(a+1,a+n+1);
	int i=1;
	while(time>=a[i]&&i<=n)
	{
		time-=a[i];
		ans++;
		i++;
	}
	cout<<ans;
	return 0;
}

求助，玄关