Submission #1046159

#	Time	Username	Problem	Language	Result	Execution time	Memory
1046159		ByeWorld	Fancy Fence (CEOI20_fancyfence)	C++14	15 / 100	46 ms	6740 KiB

fancyfence

#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#define int long long
#define ll long long
#define pb push_back
#define fi first
#define se second
#define lf (id<<1)
#define rg ((id<<1)|1)
#define md ((l+r)>>1)
#define ld long double
using namespace std;
typedef pair<int,int> pii;
typedef pair<int,pii> ipii;
typedef pair<ld,ld> pll;
const int MAXN = 3e5+15;
const int INF = 3e18+10;
const int MX = 2e18;
const int MOD = 1e9+7;
void chmn(int &a, int b){ a = min(a, b); }
void chsum(int &a, int b){ a = (a+b)%MOD; }
void chmul(int &a, int b){ a = (a*b)%MOD; }
int mul(int a, int b){ return (a*b)%MOD; }
int sum(int a, int b){ return (a+b)%MOD; }
int expo(int a, int b){
    if(b==0) return 1;
    int te = expo(a, b/2); te = mul(te, te);
    return (b%2 ? mul(te, a) : te);
}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int n;
int h[MAXN], w[MAXN];
int two;

signed main(){
    // ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n;
    two = expo(2, MOD-2);
    for(int i=1; i<=n; i++) cin >> h[i];
    int sum = 0;
    for(int i=1; i<=n; i++){ cin >> w[i]; sum += w[i]; sum %= MOD; }
    cout << mul(mul(mul(sum, sum+1), two), mul(h[1], mul(h[1]+1, two))) << '\n';
}

• Subtask 1: 0 / 0
• Subtask 2: 0 / 12
• Subtask 3: 0 / 13
• Subtask 4: 15 / 15
• Subtask 5: 0 / 15
• Subtask 6: 0 / 18
• Subtask 7: 0 / 27