Submission #8037254


Source Code Expand

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#include <bits/stdc++.h>

using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    vector<int> ds(n);
    for (auto& d : ds) {
        cin >> d;
    }
    int sum_a = 0, sum_b = 0;
    for (auto d : ds) {
        sum_a += d;
        sum_b += d*d;
    }
    cout << (sum_a*sum_a - sum_b)/2 << endl;
    return 0;
}

Submission Info

Submission Time
Task B - TAKOYAKI FESTIVAL 2019
User Tejs
Language C++14 (GCC 5.4.1)
Score 200
Code Size 389 Byte
Status
Exec Time 1 ms
Memory 256 KB

Test Cases

Set Name Score / Max Score Test Cases
All 200 / 200 sample_01, sample_02, testcase_0, testcase_1, testcase_2, testcase_3, testcase_4, testcase_5, testcase_6, testcase_7, testcase_8, testcase_9
Sample 0 / 0 sample_01, sample_02
Case Name Status Exec Time Memory
sample_01 1 ms 256 KB
sample_02 1 ms 256 KB
testcase_0 1 ms 256 KB
testcase_1 1 ms 256 KB
testcase_2 1 ms 256 KB
testcase_3 1 ms 256 KB
testcase_4 1 ms 256 KB
testcase_5 1 ms 256 KB
testcase_6 1 ms 256 KB
testcase_7 1 ms 256 KB
testcase_8 1 ms 256 KB
testcase_9 1 ms 256 KB