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Submission #669335

# Submission time Handle Problem Language Result Execution time Memory
669335 2022-12-06T09:12:50 Z raypeng1729 Sails (IOI07_sails) C++17
45 / 100
 25 ms 3776 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define all(v) v.begin(), v.end()
const int N = 1e4, INF = 1e9 + 1, MOD = 1e9 + 7, K = __lg(N) + 1;
signed main(){
    ios::sync_with_stdio(false); cin.tie(0);
    int n; cin >> n;
    int a[n], b[n], mx = 0;
    for(int i = 0; i < n; i++) cin >> a[i] >> b[i], mx = max(mx, a[i]);
    int pre[mx + 2]{};
    for(int i = 0; i < n; i++){
        pre[0]++, pre[a[i] + 1]--;
    }
    for(int i = 1; i <= mx; i++) pre[i] += pre[i - 1];
    int ans = 0, cnt = accumulate(b, b + n, 0);
    for(int i = mx; i > 0; i--){
        int cur = min(pre[i], cnt / i);
        ans += cur * (cur - 1) / 2;
        cnt -= cur;
    }
    cout << ans;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 316 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 328 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct

Subtask #4
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 2 ms 1108 KB Output is correct

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 636 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 1248 KB Output is correct

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 2004 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 14 ms 3000 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 16 ms 3540 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 25 ms 3776 KB Output isn't correct
2 Halted 0 ms 0 KB -