Submission #864623

#TimeUsernameProblemLanguageResultExecution timeMemory
864623vnm06Duathlon (APIO18_duathlon)C++14
5 / 100
1066 ms604 KiB
#include<bits/stdc++.h> #pragma GCC optimize #define endl '\n' using namespace std; long long n, m, en; vector<int> gr[55]; long long ans=0; bitset<55> post; bitset<55> vzm; void dfs(int v) { if(v==en) { vzm|=post; return; } post[v]=1; int brs=gr[v].size(); for(int i=0; i<brs; i++) { int nv=gr[v][i]; if(!post[nv]) dfs(nv); } post[v]=0; } int main() { ios::sync_with_stdio(0); cin.tie(0); cout.tie(0); cin>>n>>m; for(int i=0; i<m; i++) { int v, u; cin>>v>>u; gr[v].push_back(u); gr[u].push_back(v); } for(int i=1; i<=n; i++) { for(int j=1; j<=n; j++) { if(i==j) continue; vzm.reset(); en=j; dfs(i); vzm[i]=0; vzm[j]=0; ans+=vzm.count(); vzm.reset(); post.reset(); } } cout<<ans<<endl; return 0; } /** 8 7 1 2 2 3 2 4 3 5 5 6 6 7 6 8 4 4 1 2 2 4 2 3 3 4 */

Compilation message (stderr)

count_triplets.cpp:2:9: warning: '#pragma GCC optimize' is not a string or number [-Wpragmas]
    2 | #pragma GCC optimize
      |         ^~~
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