oj.uz

Submission #551977

# Submission time Handle Problem Language Result Execution time Memory
551977 2022-04-22T04:40:32 Z aadit_ambadkar Burza (COCI16_burza) C++11
0 / 160
 255 ms 524288 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
 
vector<int> adj[402], q[402];
int n, k, st[402], dr[402], level[402], pz;
 
// void dfs(int u, int p) {
//     if (u==p) return;
//     if (u) {
//         level[u]=level[p]+1;
//     }
//     if (level[u]==k-1) {
//         st[u]=pz++;
//         dr[u]=pz;
//     }
//     st[u]=pz;
//     for (auto i : adj[u]) {
//         if (i!=p) dfs(i, u);
//     }
//     dr[u]=pz;
// }
 
void dfs(int nod, int dad)
{
    if(nod)
        level[nod] = level[dad] + 1;
    if(level[nod] == k-1)
    {
        st[nod] = pz++;
        dr[nod] = pz;
        return;
    }
    st[nod] = pz;
    for(int i = 0; i < adj[nod].size(); ++i)
    {
        int vecin = adj[nod][i];
        if(vecin == dad)
            continue;
        dfs(vecin, dad);
    }
    dr[nod] = pz;
}
 
bool dp[402][(1<<20)];
 
// bool solve() {
//     dp[0][0]=1;
//     for (int i = 1; i < n; i++) {
//         q[st[i]].push_back(i);
//     }
//     for (int i = 0; i < pz; i++) {
//         for (int j = 0; j < (1<<k); j++) {
//             if (!dp[i][j]) continue;
//             for (auto it : q[i]) {
//                 if (!(j >> level[it] & 1)) {
//                     dp[dr[it]][j | (1<<level[it])]=1;
//                 }
//             }
//         }
//     }
//     for (int j = 0; j < (1<<k); j++) {
//         if (dp[pz][j]) return 1;
//     }
//     return 0;
// }
 
bool solve()
{
    dp[0][0] = 1;
    for(int i = 1; i < n; ++i)
        q[st[i]].push_back(i);
 
    for(int i = 0; i < pz; ++i)
    {
        for(int j = 0; j < (1<<k); ++j)
        {
            if (!dp[i][j])
                continue;
            for(int jj = 0; jj < q[i].size(); ++jj)
            {
                int it = q[i][jj];
                if (!(j >> level[it] & 1))
                    dp[dr[it]][j | (1<<level[it])] = 1;
            }
        }
    }
    for(int j = 0; j < (1<<k); ++j)
        if (dp[pz][j])
            return 1;
 
    return 0;
}
 
int main() {
    cin >> n >> k;
    if (k*k >= n) {
        cout << "DA\n";
        return 0;
    }
    for (int i = 1; i < n; i++) {
        int a, b; cin >> a >> b;
        a--; b--;
        adj[a].push_back(b);
        adj[b].push_back(a);
    }
    level[0]=-1;
    dfs(0, -1);
    cout << (solve() ? "DA\n" : "NE\n");
}

Compilation message

burza.cpp: In function 'void dfs(int, int)':
burza.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 < adj[nod].size(); ++i)
      |                    ~~^~~~~~~~~~~~~~~~~
burza.cpp: In function 'bool solve()':
burza.cpp:80:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   80 |             for(int jj = 0; jj < q[i].size(); ++jj)
      |                             ~~~^~~~~~~~~~~~~

Subtask #1
0 / 16.0

# Verdict Execution time Memory Grader output
1 Runtime error 218 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #2
0 / 16.0

# Verdict Execution time Memory Grader output
1 Runtime error 236 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Runtime error 227 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #4
0 / 16.0

# Verdict Execution time Memory Grader output
1 Runtime error 255 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #5
0 / 16.0

# Verdict Execution time Memory Grader output
1 Runtime error 230 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #6
0 / 16.0

# Verdict Execution time Memory Grader output
1 Runtime error 221 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #7
0 / 16.0

# Verdict Execution time Memory Grader output
1 Runtime error 247 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #8
0 / 16.0

# Verdict Execution time Memory Grader output
1 Runtime error 221 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #9
0 / 16.0

# Verdict Execution time Memory Grader output
1 Runtime error 225 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #10
0 / 16.0

# Verdict Execution time Memory Grader output
1 Runtime error 233 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -