oj.uz

Submission #867059

# Submission time Handle Problem Language Result Execution time Memory
867059 2023-10-27T15:49:32 Z HossamHero7 The Xana coup (BOI21_xanadu) C++14
5 / 100
 150 ms 278788 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define endl '\n'
void solve(){
    int n;
    cin>>n;
    vector<vector<int>> adj(n);
    for(int i=0;i<n-1;i++){
        int a,b;
        cin>>a>>b;
        a -- , b --;
        adj[a].push_back(b);
        adj[b].push_back(a);
    }
    int mask = 0;
    for(int i=0;i<n;i++){
        int x;
        cin>>x;
        if(!x) mask |= (1<<i);
    }
    queue<int> q;
    vector<int> dep((1<<n),-1);
    q.push(mask);
    dep[mask] = 0;
    while(q.size()){
        int mask = q.front();       q.pop();
        for(int i=0;i<n;i++){
            int nmask = mask ^ (1<<i);
            for(auto ch : adj[i]) nmask ^= (1<<ch);
            if(~dep[nmask]) continue;
            q.push(nmask);
            dep[nmask] = dep[mask] + 1;
        }
    }
    if(~dep[(1<<n)-1]) cout<<dep[(1<<n)-1]<<endl;
    else cout<<"impossible"<<endl;
}
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);      cout.tie(0);
    int t=1;
    //cin>>t;
    while(t--){
        solve();
    }
    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 860 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 37 ms 4928 KB Output is correct
4 Correct 83 ms 5456 KB Output is correct
5 Correct 35 ms 4952 KB Output is correct

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 860 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 37 ms 4928 KB Output is correct
4 Correct 83 ms 5456 KB Output is correct
5 Correct 35 ms 4952 KB Output is correct
6 Correct 4 ms 860 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 42 ms 4956 KB Output is correct
9 Correct 75 ms 5364 KB Output is correct
10 Correct 35 ms 4956 KB Output is correct
11 Runtime error 1 ms 600 KB Execution killed with signal 11
12 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 149 ms 278752 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Runtime error 150 ms 278788 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 860 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 37 ms 4928 KB Output is correct
4 Correct 83 ms 5456 KB Output is correct
5 Correct 35 ms 4952 KB Output is correct
6 Correct 4 ms 860 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 42 ms 4956 KB Output is correct
9 Correct 75 ms 5364 KB Output is correct
10 Correct 35 ms 4956 KB Output is correct
11 Runtime error 1 ms 600 KB Execution killed with signal 11
12 Halted 0 ms 0 KB -