#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> P;
typedef tuple<ll,ll,ll> PP;
typedef vector<ll> vi;
typedef vector<vi> vvi;
typedef vector<vvi> vvvi;
#define rep(i,n) for(ll i=0;i<(ll)(n);i++)
#define REP(i,k,n) for(ll i=k;i<(ll)(n);i++)
#define pb push_back
#define eb emplace_back
#define fi first
#define se second
#define all(v) v.begin(),v.end()
const ll inf=1001001001001001;
const int mod=998244353;
template<class T> bool chmin(T&a,T b){if(a>b){a=b;return true;}return false;}
template<class T> bool chmax(T&a,T b){if(a<b){a=b;return true;}return false;}
template<class T> void out(T a){cout<<a<<endl;}
template<class T> void outv(T v){rep(i,v.size()){if(i)cout<<' ';cout<<v[i];}cout<<endl;}
template<class T> void outvv(T v){rep(i,v.size())outv(v[i]);}
vvp g;
vb used;
vi cnt;
ll sz,ans=0;
void scan(int i){
used[i]=true;
sz++;
for(auto x:g[i])if(!used[x.fi])scan(x.fi);
}
vi lk,ge;
ll c,ce,cv;
vb k;
void dfs(int i,int p,int e){
vp dl;
for(auto x:g[i])if(x.fi!=p){
if(id[x.fi]==-1){
id[x.fi]=c++;
dfs(x.fi,i,x.se);
if(p!=-1){
if(lk[x.fi]>=id[i])k[i]=true;
}
dl.pb(x);
}
else chmin(lk[i],id[x.fi]);
}
for(auto x:dl){
if(k){
if(lk[x.fi]>=id[i])ge[x.se]=ce++;
else ge[x.se]=
}
}
}
int main(){
ll n,m;cin>>n>>m;
g=vvp(n);
cnt=vi(n,1);
used=vb(n,false);
rep(i,m){
ll a,b;cin>>a>>b;a--;b--;
g[a].pb(b,i);g[b].pb(a,i);
}
rep(i,n){
if(used[i])continue;
sz=0;
scan(i);
// out(sz);
id[i]=0;
c=1;
dfs(i,-1,-1);
}
out(ans);
}
Compilation message
count_triplets.cpp:24:1: error: 'vvp' does not name a type; did you mean 'vvi'?
vvp g;
^~~
vvi
count_triplets.cpp:25:1: error: 'vb' does not name a type; did you mean 'vi'?
vb used;
^~
vi
count_triplets.cpp: In function 'void scan(int)':
count_triplets.cpp:29:5: error: 'used' was not declared in this scope
used[i]=true;
^~~~
count_triplets.cpp:29:5: note: suggested alternative: 'se'
used[i]=true;
^~~~
se
count_triplets.cpp:31:16: error: 'g' was not declared in this scope
for(auto x:g[i])if(!used[x.fi])scan(x.fi);
^
count_triplets.cpp: At global scope:
count_triplets.cpp:35:1: error: 'vb' does not name a type; did you mean 'vi'?
vb k;
^~
vi
count_triplets.cpp: In function 'void dfs(int, int, int)':
count_triplets.cpp:37:5: error: 'vp' was not declared in this scope
vp dl;
^~
count_triplets.cpp:37:5: note: suggested alternative: 'p'
vp dl;
^~
p
count_triplets.cpp:38:16: error: 'g' was not declared in this scope
for(auto x:g[i])if(x.fi!=p){
^
count_triplets.cpp:39:12: error: 'id' was not declared in this scope
if(id[x.fi]==-1){
^~
count_triplets.cpp:39:12: note: suggested alternative: 'i'
if(id[x.fi]==-1){
^~
i
count_triplets.cpp:43:36: error: 'k' was not declared in this scope
if(lk[x.fi]>=id[i])k[i]=true;
^
count_triplets.cpp:45:13: error: 'dl' was not declared in this scope
dl.pb(x);
^~
count_triplets.cpp:45:13: note: suggested alternative: 'll'
dl.pb(x);
^~
ll
count_triplets.cpp:49:16: error: 'dl' was not declared in this scope
for(auto x:dl){
^~
count_triplets.cpp:49:16: note: suggested alternative: 'll'
for(auto x:dl){
^~
ll
count_triplets.cpp:50:12: error: 'k' was not declared in this scope
if(k){
^
count_triplets.cpp:51:26: error: 'id' was not declared in this scope
if(lk[x.fi]>=id[i])ge[x.se]=ce++;
^~
count_triplets.cpp:51:26: note: suggested alternative: 'i'
if(lk[x.fi]>=id[i])ge[x.se]=ce++;
^~
i
count_triplets.cpp:53:9: error: expected primary-expression before '}' token
}
^
count_triplets.cpp: In function 'int main()':
count_triplets.cpp:58:5: error: 'g' was not declared in this scope
g=vvp(n);
^
count_triplets.cpp:58:7: error: 'vvp' was not declared in this scope
g=vvp(n);
^~~
count_triplets.cpp:58:7: note: suggested alternative: 'vvi'
g=vvp(n);
^~~
vvi
count_triplets.cpp:60:5: error: 'used' was not declared in this scope
used=vb(n,false);
^~~~
count_triplets.cpp:60:5: note: suggested alternative: 'se'
used=vb(n,false);
^~~~
se
count_triplets.cpp:60:10: error: 'vb' was not declared in this scope
used=vb(n,false);
^~
count_triplets.cpp:60:10: note: suggested alternative: 'vi'
used=vb(n,false);
^~
vi
count_triplets.cpp:70:9: error: 'id' was not declared in this scope
id[i]=0;
^~
count_triplets.cpp:70:9: note: suggested alternative: 'i'
id[i]=0;
^~
i
