//Never stop trying
#include "bits/stdc++.h"
using namespace std;
#define boost ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
typedef long long ll;
typedef string str;
typedef long double ld;
typedef pair<int, int> pi;
#define fi first
#define se second
typedef vector<int> vi;
typedef vector<pi> vpi;
#define pb push_back
#define eb emplace_back
#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define endl "\n"
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
const int MOD = 1e9 + 7; //998244353
const ll INF = 1e18;
const int MX = 2e5 + 10;
const int nx[4] = {0, 0, 1, -1}, ny[4] = {1, -1, 0, 0}; //right left down up
template<class T> using V = vector<T>;
template<class T> bool ckmin(T& a, const T& b) { return a > b ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }
ll cdiv(ll a, ll b) { return a / b + ((a ^ b) > 0 && a % b); } // divide a by b rounded up
//constexpr int log2(int x) { return 31 - __builtin_clz(x); } // floor(log2(x))
mt19937 rng(chrono::system_clock::now().time_since_epoch().count());
//mt19937_64 rng(chrono::system_clock::now().time_since_epoch().count());
ll random(ll a, ll b){
return a + rng() % (b - a + 1);
}
#ifndef LOCAL
#define cerr if(false) cerr
#endif
#define dbg(x) cerr << #x << " : " << x << endl;
#define dbgs(x,y) cerr << #x << " : " << x << " / " << #y << " : " << y << endl;
#define dbgv(v) cerr << #v << " : " << "[ "; for(auto it : v) cerr << it << ' '; cerr << ']' << endl;
#define here() cerr << "here" << endl;
void IO() {
#ifdef LOCAL
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#endif
}
/////////////////////////ONLY CLEAN CODES ALLOWED/////////////////////////
int N;
vi adj[MX];
void Init(int N){
::N=N;
}
void Link(int u, int v){
adj[u].pb(v);
adj[v].pb(u);
}
bool check(int x){
vi adj2[N];
FOR(i,0,N) if(i!=x){
int cnt=0;
for(auto u: adj[i]) if(u!=x){
cnt++;
adj2[i].pb(u);
}
if(cnt>2) return 0;
}
vi vis(N,0);
FOR(i,0,N) if(i!=x && !vis[i]){
int u=i;
while(1){
vis[u]=1;
int nxt=-1;
for(auto v: adj2[u]) if(!vis[v]){
nxt=v;
}
if(nxt==-1 && sz(adj[u])==2) return 0;
if(nxt==-1) break;
u=nxt;
}
vis[u]=0;
u=i;
while(1){
vis[u]=1;
int nxt=-1;
for(auto v: adj2[u]) if(!vis[v]){
nxt=v;
}
if(nxt==-1 && sz(adj[u])==2) return 0;
if(nxt==-1) break;
u=nxt;
}
}
return 1;
}
int CountCritical(){
if(N==1) return 1;
int ans=0;
FOR(i,0,N) if(check(i)) ans++;
return ans;
}
#ifdef LOCAL
int main() {
boost; IO();
int N; cin>>N;
Init(N);
int Q; cin>>Q;
while(Q--){
int t; cin>>t;
if(!t){
int u,v; cin>>u>>v;
Link(u,v);
}
else cout << CountCritical() << endl;
}
return 0;
}
#endif
//Change your approach
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
4 ms |
4940 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
8 ms |
10036 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
4 ms |
4940 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
4 ms |
4940 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
4 ms |
4940 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
