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bipartiteGraphCppDfs
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bipartiteGraphCppDfs
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#include <bits/stdc++.h>
using namespace std;
bool bipartiteDfs(int node, vector<int> adj[], int color[]) {
for(auto it : adj[node]) {
if(color[it] == -1) {
color[it] = 1 - color[node];
if(!bipartiteDfs(it, adj, color)) {
return false;
}
} else if(color[it] == color[node]) return false;
}
return true;
}
bool checkBipartite(vector<int> adj[], int n) {
int color[n];
memset(color, -1, sizeof color);
for(int i = 0;i<n;i++) {
if(color[i] == -1) {
color[i] = 1;
if(!bipartiteDfs(i, adj, color)) {
return false;
}
}
}
return true;
}
int main() {
int n, m;
cin >> n >> m;
vector<int> adj[n];
for(int i = 0;i<m;i++) {
int u, v;
cin >> u >> v;
adj[u].push_back(v);
adj[v].push_back(u);
}
if(checkBipartite(adj, n)) {
cout << "yes";
} else {
cout << "No";
}
return 0;
}
/*
8 7
0 1
1 2
2 3
3 4
4 6
6 7
1 7
4 5
// bipartite graph example
*/
/*
7 7
0 1
1 2
2 3
3 4
4 6
6 1
4 5
// not bipartite example
*/