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Submission #641616

# Submission time Handle Problem Language Result Execution time Memory
641616 2022-09-17T10:05:25 Z Itamar Star Trek (CEOI20_startrek) C++14
0 / 100
 1 ms 2644 KB 
using namespace std;
#include <iostream>
#include <vector>
#define pi pair<int,int>
#define vi vector<int>
#define ll long long

vector<vi> f(1e5);
ll m = 1e9 + 7;
ll powe(ll a, ll b) {
    if (b == 0)
        return 1;
    ll ans = powe(a, b / 2);
    ans = (ans * ans) % m;
    if (b % 2) {
        ans = (ans * a) % m;
    }
    return ans;
}
int main()
{
    ll n,d;
    cin >> n >> d;

    for (int i = 0; i < n-1; i++) {
        int a, b;
        cin >> a >> b;
        a--, b--;
        f[a].push_back(b);
        f[b].push_back(a);
    }
    cout << powe(4, d) - 1;
}

Subtask #1
0 / 0.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2644 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2644 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2644 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2644 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2644 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2644 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2644 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2644 KB Output isn't correct
2 Halted 0 ms 0 KB -