/*
Editor: Abdelrahman Hossam
Nickname: Blobo2_Blobo2
IOI next year isA :)
*/
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,sse4.2,popcnt,abm,mmx,avx2,tune=native")
#pragma GCC optimize("-ffast-math")
#pragma GCC optimize("-funroll-loops")
#pragma GCC optimize("-funroll-all-loops,-fpeel-loops,-funswitch-loops")
#include<bits/stdc++.h>
using namespace std;
//#define int long long
#define endl "\n"
#define all(v) v.begin(),v.end()
#define gen(arr,n,nxt) generate(arr,arr+n,nxt)
#define Blobo2_el_7akim_elly_3ayz_yro7_IOI_w_3ayz_yakol_jilaty ios_base::sync_with_stdio(false);cin.tie(0);
#define EPS 0.00000001
const int mo=1e9+7,INF=1e18;
int nxt(){int x;cin>>x;return x;}
int now=-1;
vector<int>adj[50001];
unordered_set<int>st[50001];
vector<int>path;
bool vis2[50001];
int mx[50001];
int root = 0;
inline void dfs(int u){
if(path.size()+1 == now){
cout<<now<<endl;
exit(0);
}
mx[root]= max(mx[root],(int)path.size());
mx[u]=max(mx[u],(int)path.size());
path.push_back(u);
for(auto v:adj[u]){
bool bos_ana_zh2t=0;
for(int i=0;i<path.size();i++)if(path[i] == v)bos_ana_zh2t = 1;
if(bos_ana_zh2t)continue;
if(!vis2[v]){
bool iwillgothere = 1;
for(int i=0;i<path.size();i++){
if(st[path[i]].find(v) != st[path[i]].end());
else iwillgothere&=0;
}
if(iwillgothere)
dfs(v);
}
}
path.pop_back();
}
signed main(){
Blobo2_el_7akim_elly_3ayz_yro7_IOI_w_3ayz_yakol_jilaty
freopen("in.txt","r",stdin);
int n=nxt(),k=nxt();
for(int i=0;i<n;i++){
int sz = nxt();
for(int j=0;j<sz;j++){
int x=nxt();
adj[i].push_back(x);
st[i].insert(x);
}
}
int ans = -1;
for(ans = k;ans>=1;ans--){
now = ans;
for(int i =0;i<n;i++){
if(mx[i]>=ans){
cout<<ans<<endl;
return 0;
}
root = i;
vis2[i]=1;
dfs(i);
}
for(int i=0;i<n;i++)vis2[i]=0;
}
return 0;
}
Compilation message
politicaldevelopment.cpp:21:24: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+18' to '2147483647' [-Woverflow]
21 | const int mo=1e9+7,INF=1e18;
| ^~~~
politicaldevelopment.cpp: In function 'void dfs(int)':
politicaldevelopment.cpp:31:22: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
31 | if(path.size()+1 == now){
| ~~~~~~~~~~~~~~^~~~~~
politicaldevelopment.cpp:40:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
40 | for(int i=0;i<path.size();i++)if(path[i] == v)bos_ana_zh2t = 1;
| ~^~~~~~~~~~~~
politicaldevelopment.cpp:44:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
44 | for(int i=0;i<path.size();i++){
| ~^~~~~~~~~~~~
politicaldevelopment.cpp: In function 'int main()':
politicaldevelopment.cpp:56:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
56 | freopen("in.txt","r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
4172 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
4172 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
4172 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
4172 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
4172 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
