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Submission #115204

# Submission time Handle Problem Language Result Execution time Memory
115204 2019-06-06T02:18:41 Z minhtung0404 Sure Bet (CEOI17_sure) C++17
100 / 100
 127 ms 3704 KB 
//https://csacademy.com/contest/ceoi-2017-day-1/task/sure-bet/

#include<bits/stdc++.h>
const int N = 1e5 + 5;
using namespace std;

int n;
double a[N], b[N], ans;

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    cin >> n;
    for (int i = 1; i <= n; i++) cin >> a[i] >> b[i];
    sort(a+1, a+1+n, greater <double> ()); sort(b+1, b+1+n, greater <double> ());
    for (int i = 1; i <= n; i++) a[i] += a[i-1], b[i] += b[i-1];
    for (int i = 1; i <= 2*n; i++){
        int l = max(i-n, 0), r = min(n, i);
        while (l != r){
            int mid = (l + r) >> 1;
            if (a[mid] >= b[i-mid]) r = mid;
            else l = mid+1;
        }
        ans = max(ans, min(a[l], b[i-l]) - i);
        if (l > 0 && i-l < n) ans = max(ans, min(a[l-1], b[i-l+1]) - i);
    }
    cout << fixed << setprecision(4) << ans;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 356 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 3 ms 384 KB Output is correct
13 Correct 3 ms 384 KB Output is correct
14 Correct 3 ms 384 KB Output is correct
15 Correct 3 ms 384 KB Output is correct
16 Correct 3 ms 384 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 356 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 3 ms 384 KB Output is correct
13 Correct 3 ms 384 KB Output is correct
14 Correct 3 ms 384 KB Output is correct
15 Correct 3 ms 384 KB Output is correct
16 Correct 3 ms 384 KB Output is correct
17 Correct 127 ms 3356 KB Output is correct
18 Correct 84 ms 3216 KB Output is correct
19 Correct 85 ms 3360 KB Output is correct
20 Correct 87 ms 3300 KB Output is correct
21 Correct 91 ms 3704 KB Output is correct
22 Correct 83 ms 3196 KB Output is correct
23 Correct 86 ms 3320 KB Output is correct
24 Correct 87 ms 3320 KB Output is correct
25 Correct 89 ms 3320 KB Output is correct
26 Correct 94 ms 3576 KB Output is correct