Submission #921781

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
921781	2024-02-04 10:08:34	Alebn	Fancy Fence (CEOI20_fancyfence)	C++14	0 / 100	1068 ms	2432 KiB

fancyfence

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#include <bits/stdc++.h>
#define int long long
 
using namespace std;
 
const int MOD = 1e9+7, INV = 250000002;
 
int f(int n, int m) {
    return n * m % MOD * (n + 1) % MOD * (m + 1) % MOD * INV % MOD;
}
 
signed main() {
    //input and sum
    int n;
    cin >> n;
    vector<int> h(n), w(n);
    for(int i = 0; i < n; i++) cin >> h[i];
    for(int i = 0; i < n; i++) cin >> w[i];
    //linearily go over and compute result
    int res = 0;
    vector<int> hSorted(n);
    for(int i = 0; i < n; i++) hSorted[i] = h[i];
    sort(hSorted.begin(), hSorted.end());
    for(int i = 0; i < n; i++) {
        int consecutiveW = 0, minH = INT_MAX;
        for(int j = 0; j < n; j++) {
            if(h[j] < hSorted[i]) {
                res = (res + f(minH, consecutiveW)) % MOD;
                if(i != 0) res = (res - f(hSorted[i-1], consecutiveW)) % MOD;
                if(res < 0) res = (res + 10000000070000000) % MOD;
 
 
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• Subtask 1: 0 / 0
• Subtask 2: 0 / 12
• Subtask 3: 0 / 13
• Subtask 4: 0 / 15
• Subtask 5: 0 / 15
• Subtask 6: 0 / 18
• Subtask 7: 0 / 27