| # | 제출 시각 | 아이디 | 문제 | 언어 | 결과 | 실행 시간 | 메모리 |
|---|---|---|---|---|---|---|---|
| 1291914 | lukaye_19 | Arranging Shoes (IOI19_shoes) | C++20 | 13 ms | 1968 KiB |
#include <bits/stdc++.h>
using namespace std;
long long count_swaps(vector<int>shoes)
{
long long n = shoes.size() / 2;
return (n * (n - 1)) / 2;
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