GraphDS/BFS.cpp at main · vivekko/GraphDS · GitHub

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#include <bits/stdc++.h>
using namespace std;
void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(long long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}
#define NFS(nitro) ios_base::sync_with_stdio(false);cin.tie(0);
template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifndef ONLINE_JUDGE
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#define debug(x...)
#endif
#define int long long
#define vivek main
#define all(x) (x).begin(),(x).end()
#define vec_p vector<pair<int,int>
#define v vector<int>
void bfs(int n, vector<int> adj[]){
    v bfsearch;
    v visited(n+1);
    for(int i=1;i<= n; i++){
        if(visited[i] == 0){
            queue<int> q;
            q.push(i);
            visited[i] = 1;
            while(!q.empty()){
                int node = q.front();
                q.pop();
                bfsearch.push_back(node); // Processing the node
                for(auto i:adj[node]){
                    if(!visited[i]){
                        q.push(i);
                        visited[i] = 1;
                    }
                }
            }
        }
    }
}

void solve(){
    int m,n;cin>>m>>n;
    vector<int> adj[n+1];
    v visited(n+1);
    for(int i=0;i<m;i++){
        int u,x;cin>>u>>x;
        adj[u].push_back(x);
        adj[x].push_back(u);
    }
    // for(int i=0;i<n;i++){
        // if(visited[i]!=1){
            bfs(n,adj);
        // }
    // }

}
int32_t vivek(){
NFS(NITRO);
int t;
cin>>t;
while(t-->0)
    solve();
return 0;
}

// ___.   .__                 __          .__              __
// \_ |__ |  | _____    ____ |  | _____  _|__|__  __ ____ |  | __
//  | __ \|  | \__  \ _/ ___\|  |/ /\  \/ /  \  \/ // __ \|  |/ /
//  | \_\ \  |__/ __ \   \___|    <  \   /|  |\   /\  ___/|    <
//  |___  /____(____  /\___  >__|_ \  \_/ |__| \_/  \___  >__|_ \
//      \/          \/     \/     \/                    \/     \/