Submission #912875

#	Time	Username	Problem	Language	Result	Execution time	Memory
912875		1075508020060209tc	Senior Postmen (BOI14_postmen)	C++14	0 / 100	23 ms	33880 KiB

postmen

#pragma GCC optimize("O3")
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define X first
#define Y second
#define SZ(x) (int)(x).size()

int n;int m;
int ar[500005];
int br[500005];
vector<int>e[500005];
int eit[500005];
int vis[500005];
int visv[500005];
vector<vector<int>>fans;
vector<int>ans;
void dfs(int nw){
visv[nw]=1;
for(;eit[nw]<e[nw].size();eit[nw]++){
    int id=e[nw][eit[nw]];
    if(vis[id]){continue;}
    vis[id]=1;
    int v=ar[id]^br[id]^nw;
    if(visv[v]){
        vector<int>vc;
        while(ans.back()!=v){
            vc.push_back(ans.back());
            visv[nw]=0;
            ans.pop_back();
        }
        vc.push_back(v);
    }
    dfs(v);
}
ans.push_back(nw);
}


signed main(){

cin>>n>>m;
for(int i=1;i<=m;i++){
    cin>>ar[i]>>br[i];
    e[ar[i]].push_back(i);
    e[br[i]].push_back(i);
}
dfs(1);
for(int i=0;i<ans.size()-1;i++){
    cout<<ans[i]<<" ";
}cout<<"\n";

}

Compilation message (stderr)

postmen.cpp: In function 'void dfs(long long int)':
postmen.cpp:20:13: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 | for(;eit[nw]<e[nw].size();eit[nw]++){
      |      ~~~~~~~^~~~~~~~~~~~~
postmen.cpp: In function 'int main()':
postmen.cpp:49:14: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 | for(int i=0;i<ans.size()-1;i++){
      |             ~^~~~~~~~~~~~~

• Subtask 1: 0 / 38
• Subtask 2: 0 / 17
• Subtask 3: 0 / 45