제출 #492485

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
492485	2021-12-07 14:12:02	LittleCube	Fancy Fence (CEOI20_fancyfence)	C++14	30 / 100	88 ms	3964 KiB

fancyfence

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#include <bits/stdc++.h>
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define F first
#define S second
using namespace std;
const ll MOD = 1000000007;
const ll inv2 = 500000004;
int N;
ll h[100005], w[100005], ans;
vector<pll> mono = {pll{0, 0}};
signed main()
{
    cin >> N;
    for (int i = 1; i <= N; i++)
        cin >> h[i];
    for (int i = 1; i <= N; i++)
        cin >> w[i];
    N++;
    for (int i = 1; i <= N; i++)
    {
        while (h[i] < mono.back().F)
        {
            ans = (ans + (((((mono.back().S * (mono.back().S + 1) % MOD) * inv2 % MOD) * (mono[mono.size() - 1].F - mono[mono.size() - 2].F) % MOD) * (mono[mono.size() - 1].F + mono[mono.size() - 2].F + 1) % MOD) * inv2 % MOD)) % MOD;
            if (mono.size() == 2)
 
 
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