oj.uz

Submission #90537

# Submission time Handle Problem Language Result Execution time Memory
90537 2018-12-22T09:22:13 Z popovicirobert Schools (IZhO13_school) C++14
100 / 100
 112 ms 8180 KB 
#include <bits/stdc++.h>
#define lsb(x) (x & (-x))
#define ll long long
#define ull unsigned long long
#define ld long double
// 217
// 44

using namespace std;

const int MAXN = (int) 3e5;

pair <int, int> arr[MAXN + 1];

bool cmp(pair <int, int> a, pair <int, int> b) {
    /*if(a.first - a.second == b.first - b.second) {
        return a.second < b.second;
    }*/
    return a.first - a.second > b.first - b.second;
}

ll pref[MAXN + 1], suff[MAXN + 1];

int main() {
    //ifstream cin("A.in");
    //ofstream cout("A.out");
    int i, n, m, s;
    ios::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);
    cin >> n >> m >> s;
    for(i = 1; i <= n; i++) {
        cin >> arr[i].first >> arr[i].second;
    }
    sort(arr + 1, arr + n + 1, cmp);
    priority_queue <int> mst;
    ll cur = 0;
    for(i = 1; i <= n; i++) {
        if(mst.size() < m) {
            mst.push(-arr[i].first);
            cur += arr[i].first;
        }
        else if(-(mst.top()) < arr[i].first) {
            cur += mst.top();
            mst.pop();
            mst.push(-arr[i].first);
            cur += arr[i].first;
        }
        pref[i] = cur;
    }
    while(!mst.empty()) {
        mst.pop();
    }
    cur = 0;
    for(i = n; i >= 1; i--) {
        if(mst.size() < s) {
            mst.push(-arr[i].second);
            cur += arr[i].second;
        }
        else if(-(mst.top()) < arr[i].second) {
            cur += mst.top();
            mst.pop();
            mst.push(-arr[i].second);
            cur += arr[i].second;
        }
        suff[i] = cur;
    }
    ll ans = 0;
    for(i = m; i <= n - s; i++) {
        ans = max(ans, pref[i] + suff[i + 1]);
    }
    cout << ans;
    //cin.close();
    //cout.close();
    return 0;
}

Compilation message

school.cpp: In function 'int main()':
school.cpp:38:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(mst.size() < m) {
            ~~~~~~~~~~~^~~
school.cpp:55:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(mst.size() < s) {
            ~~~~~~~~~~~^~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 380 KB Output is correct
3 Correct 2 ms 584 KB Output is correct
4 Correct 2 ms 584 KB Output is correct
5 Correct 2 ms 584 KB Output is correct
6 Correct 2 ms 584 KB Output is correct
7 Correct 3 ms 616 KB Output is correct
8 Correct 3 ms 616 KB Output is correct
9 Correct 4 ms 628 KB Output is correct
10 Correct 3 ms 672 KB Output is correct
11 Correct 3 ms 704 KB Output is correct
12 Correct 3 ms 720 KB Output is correct
13 Correct 16 ms 1744 KB Output is correct
14 Correct 28 ms 2684 KB Output is correct
15 Correct 50 ms 4352 KB Output is correct
16 Correct 67 ms 5624 KB Output is correct
17 Correct 89 ms 6260 KB Output is correct
18 Correct 90 ms 6776 KB Output is correct
19 Correct 97 ms 7208 KB Output is correct
20 Correct 112 ms 8180 KB Output is correct