Submission #74743169

Source Code Expand

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,n) for(int i = 0; i < (n); i++)

int main(){

    int n, k;
    cin >> n >> k;
    vector<int> a(n);
    rep(i,n) cin >> a[i];
    sort(a.begin(), a.end());

    ll ans = 0;
    rep(i,n){
        int it = a.end() - lower_bound(a.begin(), a.end(), k - a[i]);
        int sum = min(it, n - i - 1);
        ans += sum;
    }
    cout << ans << endl;

    return 0;
}

Submission Info

Submission Time
Task C - Total Score of Pairs
User jon0920
Language C++23 (GCC 15.2.0)
Score 366
Code Size 467 Byte
Status AC
Exec Time 69 ms
Memory 4156 KiB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 366 / 366
Status
AC × 5
AC × 70
Set Name Test Cases
Sample sample01.txt, sample02.txt, sample03.txt, sample04.txt, sample05.txt
All sample01.txt, sample02.txt, sample03.txt, sample04.txt, sample05.txt, in01.txt, in02.txt, in03.txt, in04.txt, in05.txt, in06.txt, in07.txt, in08.txt, in09.txt, in10.txt, in11.txt, in12.txt, in13.txt, in14.txt, in15.txt, in16.txt, in17.txt, in18.txt, in19.txt, in20.txt, in21.txt, in22.txt, in23.txt, in24.txt, in25.txt, in26.txt, in27.txt, in28.txt, in29.txt, in30.txt, in31.txt, in32.txt, in33.txt, in34.txt, in35.txt, in36.txt, in37.txt, in38.txt, in39.txt, in40.txt, in41.txt, in42.txt, in43.txt, in44.txt, in45.txt, in46.txt, in47.txt, in48.txt, in49.txt, in50.txt, in51.txt, in52.txt, in53.txt, in54.txt, in55.txt, in56.txt, in57.txt, in58.txt, in59.txt, in60.txt, in61.txt, in62.txt, in63.txt, in64.txt, in65.txt
Case Name Status Exec Time Memory
in01.txt AC 1 ms 3608 KiB
in02.txt AC 1 ms 3488 KiB
in03.txt AC 1 ms 3452 KiB
in04.txt AC 1 ms 3600 KiB
in05.txt AC 1 ms 3540 KiB
in06.txt AC 1 ms 3488 KiB
in07.txt AC 1 ms 3440 KiB
in08.txt AC 21 ms 3900 KiB
in09.txt AC 56 ms 4080 KiB
in10.txt AC 65 ms 4032 KiB
in11.txt AC 66 ms 4096 KiB
in12.txt AC 68 ms 4156 KiB
in13.txt AC 63 ms 4044 KiB
in14.txt AC 29 ms 3984 KiB
in15.txt AC 52 ms 3984 KiB
in16.txt AC 56 ms 4052 KiB
in17.txt AC 21 ms 4032 KiB
in18.txt AC 1 ms 3608 KiB
in19.txt AC 58 ms 3984 KiB
in20.txt AC 39 ms 4004 KiB
in21.txt AC 53 ms 4120 KiB
in22.txt AC 53 ms 4044 KiB
in23.txt AC 45 ms 4036 KiB
in24.txt AC 44 ms 4044 KiB
in25.txt AC 40 ms 4044 KiB
in26.txt AC 68 ms 4016 KiB
in27.txt AC 56 ms 3956 KiB
in28.txt AC 56 ms 3956 KiB
in29.txt AC 63 ms 4004 KiB
in30.txt AC 1 ms 3584 KiB
in31.txt AC 1 ms 3584 KiB
in32.txt AC 1 ms 3632 KiB
in33.txt AC 53 ms 4004 KiB
in34.txt AC 1 ms 3644 KiB
in35.txt AC 1 ms 3604 KiB
in36.txt AC 1 ms 3452 KiB
in37.txt AC 2 ms 3452 KiB
in38.txt AC 63 ms 4036 KiB
in39.txt AC 1 ms 3460 KiB
in40.txt AC 1 ms 3436 KiB
in41.txt AC 1 ms 3436 KiB
in42.txt AC 1 ms 3592 KiB
in43.txt AC 1 ms 3440 KiB
in44.txt AC 1 ms 3636 KiB
in45.txt AC 1 ms 3480 KiB
in46.txt AC 1 ms 3404 KiB
in47.txt AC 21 ms 3900 KiB
in48.txt AC 63 ms 4032 KiB
in49.txt AC 30 ms 3984 KiB
in50.txt AC 62 ms 3956 KiB
in51.txt AC 69 ms 4032 KiB
in52.txt AC 55 ms 4080 KiB
in53.txt AC 69 ms 4120 KiB
in54.txt AC 1 ms 3452 KiB
in55.txt AC 1 ms 3436 KiB
in56.txt AC 1 ms 3604 KiB
in57.txt AC 1 ms 3584 KiB
in58.txt AC 1 ms 3632 KiB
in59.txt AC 1 ms 3440 KiB
in60.txt AC 21 ms 3936 KiB
in61.txt AC 21 ms 3936 KiB
in62.txt AC 1 ms 3592 KiB
in63.txt AC 1 ms 3452 KiB
in64.txt AC 1 ms 3604 KiB
in65.txt AC 1 ms 3604 KiB
sample01.txt AC 1 ms 3444 KiB
sample02.txt AC 1 ms 3592 KiB
sample03.txt AC 1 ms 3516 KiB
sample04.txt AC 1 ms 3516 KiB
sample05.txt AC 1 ms 3548 KiB