Submission #534902

#	Time	Username	Problem	Language	Result	Execution time	Memory
534902		leinad2	Star Trek (CEOI20_startrek)	C++17	0 / 100	1 ms	204 KiB

startrek

#include<bits/stdc++.h>
using namespace std;
int n, i, j, k, a, b, c, d, mod=1e9+7;
int f(int a, int b)
{
    if(b==0)return 1;
    int p=f(a, b/2);
    if(b%2)return ((1LL*p*p)%mod*a)%mod;
    else return (1LL*p*p)%mod;
}
main()
{
    cin>>a>>a;
    cout<<f(4, a)-1;
}

Compilation message (stderr)

startrek.cpp:11:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   11 | main()
      | ^~~~

• Subtask 1: 0 / 0
• Subtask 2: 0 / 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