Submission #1101250

#	Time	Username	Problem	Language	Result	Execution time	Memory
1101250		fve5	Star Trek (CEOI20_startrek)	C++17	7 / 100	1 ms	500 KiB

startrek

    #include <bits/stdc++.h>
    using namespace std;
     
    constexpr int MOD = 1e9 + 7;
     
    int main() {
      int N; cin >> N;
      long long D; cin >> D;
      
      long long b = 4;
      long long a = 1;
      do {
        if (D & 1) a = a * b % MOD;
        b = b * b % MOD;
      } while (D >>= 1);
      
      cout << a << '\n';
    }

• Subtask 1: 0 / 0
• Subtask 2: 7 / 7
• Subtask 3: 0 / 8
• Subtask 4: 0 / 15
• Subtask 5: 0 / 15
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20
• Subtask 8: 0 / 15