oj.uz

Submission #98531

# Submission time Handle Problem Language Result Execution time Memory
98531 2019-02-23T20:52:34 Z dalgerok Burza (COCI16_burza) C++17
0 / 160
 142 ms 1016 KB 
#include<bits/stdc++.h>
using namespace std;


const int M = 405, N = 20;




int n, k, d[M];
int tin[M], tout[M], timer;
vector < int > g[M], q[M];
bitset < (1 << N) > dp[M];

void dfs(int v, int pr = -1){
    if(d[v] == k){
        tin[v] = timer++;
        tout[v] = timer;
        return;
    }
    tin[v] = timer;
    for(int to : g[v]){
        if(to != pr){
            d[to] = d[v] + 1;
            dfs(to, v);
        }
    }
    tout[v] = timer;
}

int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin >> n >> k;
    if(k * k >= n){
        return cout << "DA", 0;
    }
    for(int i = 1; i < n; i++){
        int x, y;
        cin >> x >> y;
        x -= 1;
        y -= 1;
        g[x].push_back(y);
        g[y].push_back(x);
    }
    dfs(0);
    for(int i = 0; i < n; i++){
        if(d[i] == 0){
            continue;
        }
        d[i] -= 1;
        if(d[i] == 0){
            dp[tin[i]][0] = true;
        }
        q[tin[i]].push_back(i);
    }
    for(int i = 0; i < timer; i++){
        for(int j = 0; j < (1 << k); j++){
            if(dp[i][j] == true){
                for(auto it : q[i]){
                    if(!((j >> d[it]) & 1)){
                        dp[tout[it]][j | (1 << d[it])] = true;
                    }
                }
            }
        }
    }
    for(int i = 0; i < (1 << k); i++){
        if(dp[timer][i] == true){
            return cout << "DA", 0;
        }
    }
    cout << "NE";
}

Subtask #1
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 13 ms 640 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 117 ms 1016 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 142 ms 888 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 31 ms 640 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 80 ms 860 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 94 ms 972 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 123 ms 932 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 35 ms 640 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 640 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #10
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 50 ms 696 KB Output isn't correct
2 Halted 0 ms 0 KB -