Submission #1128418

#	Time	Username	Problem	Language	Result	Execution time	Memory
1128418		KasymK	Political Development (BOI17_politicaldevelopment)	C++20	0 / 100	28 ms	20292 KiB

politicaldevelopment

// I want to go high as fuck tonight...
// Music name => (Gyzyl Ysyk)
// Authors: A$OK, SazYelme, Swizzy347 and Ma.Gallery
// Hash your favorite words.
#include "bits/stdc++.h"
using namespace std;
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define ll long long
#define pb push_back
#define pii pair<int, int>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define tr(i, c) for(auto i = c.begin(); i != c.end(); ++i)
#define wr puts("----------------")
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
const int N = 5e4+5;
bitset<N> adj[N];
int answer, n;

void dfs(bitset<N> vis, int mal){
    while(1){
        // bool did=0;
        // for(auto i : vis)
        //     did|=i;
        // if(!did)
        //     break;
        if(!vis.any())
            break;
        // int id=n;
        // for(int i = n-1; i >= 0; --i)
        //     if(vis[i]){
        //         vis[i]=0;
        //         id=i;
        //         break;
        //     }
        int id=vis._Find_first();
        vis[id]=0;
        // vector<bool> is(n, false);
        bitset<N> is=vis&adj[id];
        int cnt=is.count();
        // for(int i = 0; i < n; ++i)
        //     if(vis[i] and adj[id][i])
        //         is[i]=1;
        // int cnt=0;
        // for(int i = 0; i < n; ++i)
        //     cnt+=is[i];
        if(umax(answer, cnt+mal+1))
            dfs(is, mal+1);
    }
}


int main(){
    int k;
    scanf("%d%d", &n, &k);
    for(int i = 0; i < n; ++i){
        int x, ad;
        scanf("%d", &x);
        adj[i][i]=1;
        while(x--)
            scanf("%d", &ad), adj[i][ad]=1;
    }
    bitset<N> vis;
    for(int i = 0; i < n; ++i)
        vis.set(i);
    dfs(vis, 0);
    printf("%d\n", answer);
    return 0;
}

Compilation message (stderr)

politicaldevelopment.cpp: In function 'int main()':
politicaldevelopment.cpp:58:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   58 |     scanf("%d%d", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~
politicaldevelopment.cpp:61:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |         scanf("%d", &x);
      |         ~~~~~^~~~~~~~~~
politicaldevelopment.cpp:64:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |             scanf("%d", &ad), adj[i][ad]=1;
      |             ~~~~~^~~~~~~~~~~

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