MT3030 天梯赛

#include <bits/stdc++.h>
using namespace std;
const long long int N = 1e5 + 10;
long long int n, ans, sum;
struct node
{
    long long int a;
    long long int b;
    bool operator>(const node &b) const
    {
        return a > b.a;
    }
} a[N];
priority_queue<node, vector<node>, greater<node>> q; // 战斗力从小到大排列
bool cmp(node a, node b)
{ // 按b容忍度从大到小排序
    return a.b > b.b;
}
int main()
{
    cin >> n;
    for (long long int i = 1; i <= n; i++)
    {
        cin >> a[i].a >> a[i].b;
    }
     sort(a + 1, a + n + 1, cmp); // 按容忍度从大到小排列
    for (long long int i = 1; i <= n; i++)
    {
        q.push(a[i]);
        sum += a[i].a; // 存战斗力
        while (q.size() > a[i].b)
        {
            sum -= q.top().a; // 取出q.top()战斗力最小的
            q.pop();
        }
        ans = max(ans, sum);
    }
    cout << ans;
    return 0;
}