Submission #428735

#	Time	Username	Problem	Language	Result	Execution time	Memory
428735		ocarima	Star Trek (CEOI20_startrek)	C++14	7 / 100	1 ms	312 KiB

startrek

#include<bits/stdc++.h>

using namespace std;

#define fastio ios_base::sync_with_stdio(false); cin.tie(0)
#define lli long long
#define rep(i, a, b) for(lli i = (a); i <= (b); ++i)
#define repa(i, a, b) for(lli i = (a); i >= (b); --i)

#define nl "\n"
#define debugsl(x) cout << #x << " = " << x << ", "
#define debug(x) debugsl(x) << nl
#define debugarr(x, a, b) cout << #x << " = ["; rep(ii, a, b){ cout << x[ii] << ", "; } cout << "]" << nl

#define MOD 1000000007

lli n, d;

lli binexp(lli b, lli e){
    lli res = 1;
    while (e > 0){
        if (e & 1) res = (res * b) % MOD;
        e >>= 1;
        b = (b * b) % MOD;
    }
    return res;
}

int main()
{
    fastio;

    cin >> n >> d;

    if (n == 2) cout << binexp(4, d);
    else cout << 0;


    return 0;
}

• 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