Submission #1263951

#TimeUsernameProblemLanguageResultExecution timeMemory
1263951BlockOGArranging Shoes (IOI19_shoes)C++20
15 / 100
12 ms1864 KiB
#include <bits/stdc++.h> // mrrrow meeow :3 // go play vivid/stasis now! it's free on steam #define fo(i, a, b) for (auto i = (a); i < (b); i++) #define of(i, a, b) for (auto i = (b); i-- > (a);) #define f first #define s second #define pb push_back #define pob pop_back #define lb lower_bound #define ub upper_bound #define be(a) a.begin(), a.end() using namespace std; int ____init = [] { ios::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); return 0; }(); long long count_swaps(vector<int> s) { long long n = s.size() / 2; return n * (n - 1) / 2; }
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