oj.uz

답안 #472461

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
472461 2021-09-13T15:40:31 Z Blobo2_Blobo2 Political Development (BOI17_politicaldevelopment) C++14
0 / 100
 182 ms 41952 KB 
/*
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];
bool vis[50001];
map<pair<int,int> ,bool>ok;
vector<int>path;
void dfs(int u){
    if(path.size()+1 == now){
        cout<<now<<endl;
        exit(0);
    }
    vis[u] = 1;
    path.push_back(u);
    for(auto v:adj[u]){
        if(!vis[v]){
            bool iwillgothere = 1;
            for(int i=0;i<path.size();i++){
                if(ok[{v,path[i]}]||ok[{path[i],v}]);
                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);
            ok[{i,x}] = 1;
        }
    }
    int ans = -1;
    for(ans = k;ans>=3;ans--){
        now = ans;
        for(int i =0;i<n;i++){
            dfs(i);
            memset(vis,0,sizeof vis);
        }
    }
    if(n==1)cout<<1<<endl;
    else{
        for(int i=0;i<n;i++){
            for(int j=i+1;j<n;j++){
                if(ok[{j,i}]||ok[{i,j}]){
                    cout<<2<<endl;
                    return 0;
                }
            }
        }
        cout<<1<<endl;
    }
    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:29:22: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   29 |     if(path.size()+1 == now){
      |        ~~~~~~~~~~~~~~^~~~~~
politicaldevelopment.cpp:38:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |             for(int i=0;i<path.size();i++){
      |                         ~^~~~~~~~~~~~
politicaldevelopment.cpp: In function 'int main()':
politicaldevelopment.cpp:50:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |     freopen("in.txt","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 172 ms 41896 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 172 ms 41896 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 182 ms 41952 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 172 ms 41896 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 172 ms 41896 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -