Submission #971500

#	Time	Username	Problem	Language	Result	Execution time	Memory
971500		gutzzy	Political Development (BOI17_politicaldevelopment)	C++14	16 / 100	3088 ms	340344 KiB

politicaldevelopment

#include <bits/stdc++.h>
using namespace std;
#define int unsigned short

int32_t main(){
    int n, k, d, a;
    cin >> n >> k;
    vector<vector<bool>> ady(n,vector<bool>(n,0));
    set<set<int>> last;
    for(int i=0;i<n;i++){
        last.insert({i});
        cin >> d;
        for(int j=0;j<d;j++){
            cin >> a;
            ady[min(i,a)][max(i,a)] = 1;
        }
    }
    int cur = 2;
    bool optim = false;
    while(cur<=k){
        int s = last.size();
        set<set<int>> nw;
        for(auto li:last){
            if(optim) break;
            // last[i] --> completed graphs of cur-1 nodes
            for(int x=0;x<n;x++){
                if (optim) break;
                bool found = true;
                for(auto p:li){
                    if(ady[min(x,p)][max(x,p)]==0){
                        found = false;
                        break;
                    }
                }
                if(found){
                    set<int> temp = li;
                    temp.insert(x);
                    nw.insert(temp);
                    //for(int kk=0;kk<last[i].size();kk++) cout << last[i][kk] << " ";
                    //cout << x << endl;
                    if(cur==k) optim = true;
                }
            }
        }
        if(nw.size()==0) break;
        else{
            last = nw;
            cur++;
        }
    }
    cout << cur-1 << endl;
}

Compilation message (stderr)

politicaldevelopment.cpp: In function 'int32_t main()':
politicaldevelopment.cpp:21:13: warning: unused variable 's' [-Wunused-variable]
   21 |         int s = last.size();
      |             ^

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