oj.uz

Submission #672188

# Submission time Handle Problem Language Result Execution time Memory
672188 2022-12-15T02:29:23 Z Alihan_8 Schools (IZhO13_school) C++17
100 / 100
 105 ms 11396 KB 
#include <bits/stdc++.h>
// include <ext/pb_ds/assoc_container.hpp>
// include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;
using namespace std;
#define all(x) x.begin(), x.end()
#define pb push_back
// define ordered_set tree<int,null_type,less_equal<int>,rb_tree_tag,tree_order_statistics_node_update>
#define mpr make_pair
#define ln '\n'
void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
#define int long long
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    int n, m, s; cin >> n >> m >> s;
    vector <pair<int,int>> p(n);
    for ( auto &[l, r]: p ) cin >> l >> r;
    sort(all(p), [&](pair <int,int> &l, pair <int,int> &r){
         return (l.first-l.second) > (r.first-r.second);
    });
    priority_queue <int> q;
    vector <int> L(n), R(n);
    int cnt = 0;
    for ( int i = 0; i < n; i++ ){
        auto [l, r] = p[i];
        q.push(-l);
        cnt += l;
        while ( (int)q.size() > m ){
            cnt -= -q.top();
            q.pop();
        }
        L[i] = cnt;
    }
    cnt = 0;
    while ( !q.empty() ) q.pop();
    for ( int i = n-1; i >= 0; i-- ){
        auto [l, r] = p[i];
        q.push(-r);
        cnt += r;
        while ( (int)q.size() > s ){
            cnt -= -q.top();
            q.pop();
        }
        R[i] = cnt;
    }
    int Mx = max(R[0], L.back());
    for ( int i = 0; i+1 < n; i++ ){
        Mx = max(Mx, L[i]+R[i+1]);
    }
    cout << Mx;

    cout << '\n';
}

Compilation message

school.cpp: In function 'void IO(std::string)':
school.cpp:11:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
school.cpp:11:70: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                                                               ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 2 ms 596 KB Output is correct
9 Correct 2 ms 468 KB Output is correct
10 Correct 2 ms 580 KB Output is correct
11 Correct 2 ms 468 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 17 ms 2128 KB Output is correct
14 Correct 27 ms 3724 KB Output is correct
15 Correct 47 ms 5948 KB Output is correct
16 Correct 58 ms 8756 KB Output is correct
17 Correct 77 ms 8860 KB Output is correct
18 Correct 87 ms 9584 KB Output is correct
19 Correct 98 ms 10268 KB Output is correct
20 Correct 105 ms 11396 KB Output is correct