제출 #405364

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
405364		MeGustaElArroz23	Calvinball championship (CEOI15_teams)	C++14	0 / 100	4 ms	364 KiB

teams

#include<bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int,int> pii;
typedef vector<ll> vi;
typedef vector<vi> vvi;
typedef vector<pii> vii;

const ll mod=1000007;

ll power(int a, int b){
    if (b==0) return 1;
    ll sol=power(a,b/2)%mod;
    if (b%2) sol*=a;
    return sol%mod;
}

int main(){
    int n;
    cin >> n;
    vi v(n);
    for (int i=n-1;i>=0;i--) cin >>v[i];
    ll sol=0;
    for (int i=0;i<n;i++) sol+=power(v[i],i);
    cout << sol%mod<<'\n';
}

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