Submission #936340

#	Time	Username	Problem	Language	Result	Execution time	Memory
936340		VMaksimoski008	Fancy Fence (CEOI20_fancyfence)	C++14	15 / 100	59 ms	3156 KiB

fancyfence

#include <bits/stdc++.h>

#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
//#define int long long

using namespace std;

using ll = long long;
using ull = unsigned long long;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int mod = 1e9 + 7;
const int inv = 500000004;
const int LOG = 20;
const int maxn = 1e5 + 5;
const double eps = 1e-9;

int32_t main() {
    int n;
    cin >> n;
    set<int> diff;

    vector<int> h(n), w(n);
    for(int &x : h) cin >> x, diff.insert(x);
    for(int &x : w) cin >> x;

    if(diff.size() == 1) {
        ll W = 0;
        for(int &x : w) W += x, W %= mod;
        ll p1 = W * (W + 1) % mod * inv % mod;
        ll p2 = 1ll * h[0] * (h[0] + 1) % mod * inv % mod;
        cout << (p1 * p2) % mod << '\n';
    }

    return 0;
}

• 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