Submission #476143

#	Time	Username	Problem	Language	Result	Execution time	Memory
476143		Blobo2_Blobo2	Political Development (BOI17_politicaldevelopment)	C++14	39 / 100	3073 ms	30480 KiB

politicaldevelopment

/*
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")
#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;
inline void dfs(int u){
    if(path.size()+1 == now){
        cout<<now<<endl;
        exit(0);
    }
    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;
        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
    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++)
            dfs(i);
    }
    return 0;
}

Compilation message (stderr)

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:28:22: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   28 |     if(path.size()+1 == now){
      |        ~~~~~~~~~~~~~~^~~~~~
politicaldevelopment.cpp:35:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |         for(int i=0;i<path.size();i++)if(path[i] == v)bos_ana_zh2t = 1;
      |                     ~^~~~~~~~~~~~
politicaldevelopment.cpp:38:22: 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++){
      |                     ~^~~~~~~~~~~~

• Subtask 1: 4 / 4
• Subtask 2: 12 / 12
• Subtask 3: 23 / 23
• Subtask 4: 0 / 38
• Subtask 5: 0 / 23