Submission #1320338

#	Time	Username	Problem	Language	Result	Execution time	Memory
1320338		vaishakhv	Star Trek (CEOI20_startrek)	C++20	0 / 100	1 ms	332 KiB

startrek

// Source: https://usaco.guide/general/io

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define eb emplace_back // faster than push_back xD

// pbds UwU
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
#define oset tree<ll, null_type,less<ll>, rb_tree_tag,tree_order_statistics_node_update> // use pair for ms

// my io library :D
#define m1(x) template<class T, class... U> void x(T&& a, U&&... b)
#define m2(x) (ll[]){(x forward<U>(b),0)...}

m1(pr){cout << forward<T>(a);  m2(cout << " " <<); cout << "\n";}
m1(re){cin >> forward<T>(a); m2(cin >>);}

const ll MOD = 1e9+7;

int main() {
	ios::sync_with_stdio(0);
    cin.tie(0);

    ll n, d; re(n, d);
    for (ll i{}; i < n-1; i++){
        ll u, v; re(u, v);
    }

    ll ans = 1;
    for (ll i{}; i < n; i++){
        ans *= 2;
        ans %= MOD;
    }

    pr(ans);
}

• 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