Submission #65646785

Source Code Expand

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#include <atcoder/all>
using namespace atcoder;

int main(){
    ll N; cin >> N;
    vector<ll> A(N);
    ll p = 0, s = 0;
    for(int i = 0; i < N; i++){
        cin >> A[i];
        s += A[i];
        p += A[i]*A[i];
    }
    cout << (s * s - p)/2 << endl;
}

Submission Info

Submission Time
Task C - Sum of Product
User iphi7
Language C++ 23 (gcc 12.2)
Score 300
Code Size 347 Byte
Status AC
Exec Time 47 ms
Memory 5732 KiB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 300 / 300
Status
AC × 3
AC × 22
Set Name Test Cases
Sample 00_sample_00.txt, 00_sample_01.txt, 00_sample_02.txt
All 00_sample_00.txt, 00_sample_01.txt, 00_sample_02.txt, 01_random_00.txt, 01_random_01.txt, 01_random_02.txt, 01_random_03.txt, 01_random_04.txt, 01_random_05.txt, 01_random_06.txt, 01_random_07.txt, 01_random_08.txt, 01_random_09.txt, 01_random_10.txt, 01_random_11.txt, 01_random_12.txt, 01_random_13.txt, 01_random_14.txt, 02_handmade_00.txt, 02_handmade_01.txt, 02_handmade_02.txt, 02_handmade_03.txt
Case Name Status Exec Time Memory
00_sample_00.txt AC 1 ms 3516 KiB
00_sample_01.txt AC 1 ms 3572 KiB
00_sample_02.txt AC 1 ms 3516 KiB
01_random_00.txt AC 18 ms 4240 KiB
01_random_01.txt AC 32 ms 5200 KiB
01_random_02.txt AC 39 ms 5376 KiB
01_random_03.txt AC 20 ms 4212 KiB
01_random_04.txt AC 32 ms 5120 KiB
01_random_05.txt AC 41 ms 5552 KiB
01_random_06.txt AC 42 ms 5732 KiB
01_random_07.txt AC 41 ms 5556 KiB
01_random_08.txt AC 42 ms 5564 KiB
01_random_09.txt AC 41 ms 5528 KiB
01_random_10.txt AC 41 ms 5552 KiB
01_random_11.txt AC 42 ms 5572 KiB
01_random_12.txt AC 42 ms 5572 KiB
01_random_13.txt AC 41 ms 5476 KiB
01_random_14.txt AC 42 ms 5564 KiB
02_handmade_00.txt AC 1 ms 3564 KiB
02_handmade_01.txt AC 1 ms 3480 KiB
02_handmade_02.txt AC 26 ms 5488 KiB
02_handmade_03.txt AC 47 ms 5496 KiB