Submission #673599

#	Time	Username	Problem	Language	Result	Execution time	Memory
673599		moday_morning	Schools (IZhO13_school)	C++17	100 / 100	131 ms	10772 KiB

school

#include <bits/stdc++.h>
#define fr first
#define sc second
#define int long long
using namespace std;

const int N = 300005;
int v[N], v1[N];
pair <int, int> a[N];

void solve () {
    int n, x, y;
    cin >> n >> x >> y;
    for(int i = 1; i <= n; i++) {
        cin >> a[i].fr >> a[i].sc;
    }
    sort(a+1, a+n+1, [] (pair <int, int> a, pair <int, int> b) -> bool {return a.fr - a.sc > b.fr - b.sc;});
    priority_queue<int, vector<int>, greater<int>> q;
    int sum = 0;;
    for (int i = 1; i <= n; i++) {
        sum += a[i].fr;
        q.push(a[i].fr);
        if(q.size() > x) {
            sum -= q.top();
            q.pop();
        }
        v[i] = sum;
    }
    while (!q.empty()) {
        q.pop();
        sum = 0;
    }
    for (int i = n; i >= 1; i--) {
        sum += a[i].sc;
        q.push(a[i].sc);
        if (q.size() > y) {
            sum -= q.top();
            q.pop();
        }
        v1[i] = sum;
    }
    int mx = 0;
    for (int i = x; i <= n-y; i++) {
        mx = max(mx, v[i] + v1[i+1]);
    }
    cout << mx << "\n";
}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int t = 1;
//    cin >> t;
    while (t--) {
        solve();
    }
}

Compilation message (stderr)

school.cpp: In function 'void solve()':
school.cpp:23:21: warning: comparison of integer expressions of different signedness: 'std::priority_queue<long long int, std::vector<long long int>, std::greater<long long int> >::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   23 |         if(q.size() > x) {
      |            ~~~~~~~~~^~~
school.cpp:36:22: warning: comparison of integer expressions of different signedness: 'std::priority_queue<long long int, std::vector<long long int>, std::greater<long long int> >::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   36 |         if (q.size() > y) {
      |             ~~~~~~~~~^~~

• Subtask 1: 100 / 100