#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
typedef long long ll;
typedef double db;
typedef vector<long long> vl;
typedef pair<long long , long long > pl;
const int N=1e6+1;
#define po pop_back
#define pb push_back
#define mk make_pair
#define lw lower_bound
#define up upper_bound
#define ff first
#define ss second
#define boost ios_base::sync_with_stdio(); cin.tie(0); cout.tie(0);
#define MOD 1000000007
#define MAX 1e18
#define MIN -1e18
#define rep(i,a,b) for(ll i=a;i<=b;i++)
#define per(i,a,b) for(ll i=b;i>=a;i--)
#define con continue
#define freopen freopen("input.txt", "r", stdin);freopen("output.txt", "w", stdout);
#define PI 3.14159265358979323846264338327950288419716939937510582097494459230781640628
// typedef tree<ll , null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
// template< typename T>
// using indexed_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
ll n,m,ans,mid,mn,mx,cnt,T,sum,h1,h2,e[1234567],b[1234567],c[1234567],d[1<<20],k,i,j,l,h,a[1234567],w,x,y,z;
ll c1[123][123];
bool used[1234],used1[1234567];
pl p[1234567];
string s,s1[1234567];
map<ll,ll> mp;
map<pl,ll> mpl;
vector<pl> vec,vec1,ansvec;
vector<ll> v[1234567],v1[1234567];
vector<ll> vp[1234567];
set<ll> st;
stack <ll> sta;
set<pl>sp;
void dfs(ll x,ll y){
if(y != 0) ans += y-1;
used[x] = 1;
for(ll i=0;i<v[x].size();i++){
ll u = v[x][i];
if(used[u]==0) dfs(x,y+1);
}
}
int main(){
cin>>n>>m;
for(ll i=0;i<m;i++){
ll a,b;
cin>>a>>b;
a--;
b--;
v[a].pb(b);
v[b].pb(a);
}
for(ll i=0;i<n;i++){
memset(done,0,sizeof(done));
dfs(i,0);
}
cout<<ans;
Compilation message
count_triplets.cpp: In function 'void dfs(ll, ll)':
count_triplets.cpp:46:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(ll i=0;i<v[x].size();i++){
~^~~~~~~~~~~~
count_triplets.cpp: In function 'int main()':
count_triplets.cpp:62:16: error: 'done' was not declared in this scope
memset(done,0,sizeof(done));
^~~~
count_triplets.cpp:62:16: note: suggested alternative: 'clone'
memset(done,0,sizeof(done));
^~~~
clone
count_triplets.cpp:65:14: error: expected '}' at end of input
cout<<ans;
^
