#include <bits/stdc++.h>
using namespace std;
typedef long long lo;
#define fi first
#define se second
#define endl "\n"
#define pb push_back
#define fio() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define FOR for(int i=1;i<=n;i++)
#define mid ((start+end)/2)
#define ort ((bas+son)/2)
const lo inf = 1000000000;
const lo li = 500005;
const lo mod = 1000000007;
int n,m,a[li],k,flag,t,vis[li],pre[li];
int cev;
string s;
vector<pair<int,int>> v[li];
map<pair<int,int>,int> mpp;
inline void dfs(int node,int xorr){
vis[node]=1;
for(auto go:v[node]){
if(go.fi!=pre[node] && vis[go.fi] && (xorr^go.se)){
printf("1\n%d 1 %d\n",xorr^go.se,mpp[{node,go.fi}]);
exit(0);
}
else{
if(vis[go.fi]==0){pre[go.fi]=node;dfs(go.fi,xorr^go.se);}
}
}
}
int main(void){
scanf("%d %d",&n,&m);
for(int i=1;i<=m;i++){
int x,y,z;
scanf("%d %d %d",&x,&y,&z);
v[x].pb({y,z});
v[y].pb({x,z});
mpp[{x,y}]=i;
mpp[{y,x}]=i;
}
dfs(1,0);
printf("0\n");
return 0;
}
Compilation message
parkticni.cpp: In function 'int main()':
parkticni.cpp:40:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
40 | scanf("%d %d",&n,&m);
| ~~~~~^~~~~~~~~~~~~~~
parkticni.cpp:43:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
43 | scanf("%d %d %d",&x,&y,&z);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
73 ms |
20584 KB |
There is a simple cycle which is not good |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
35 ms |
16048 KB |
There is a simple cycle which is not good |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
55 ms |
20888 KB |
There is a simple cycle which is not good |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
126 ms |
28476 KB |
There is a simple cycle which is not good |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
76 ms |
24168 KB |
There is a simple cycle which is not good |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
91 ms |
24980 KB |
There is a simple cycle which is not good |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
125 ms |
28728 KB |
There is a simple cycle which is not good |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
157 ms |
29844 KB |
There is a simple cycle which is not good |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
37 ms |
17996 KB |
There is a simple cycle which is not good |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
135 ms |
29636 KB |
There is a simple cycle which is not good |
2 |
Halted |
0 ms |
0 KB |
- |