Submission #990861

#	Time	Username	Problem	Language	Result	Execution time	Memory
990861		LucaIlie	Fancy Fence (CEOI20_fancyfence)	C++17	12 / 100	3 ms	376 KiB

fancyfence

#include <iostream>

using namespace std;

#define nmax 10000
#define mod 1000000007
int w[nmax], h[nmax];

int comb2( int x ) {
    long long rez = 0;
    rez = rez + x + ((long long) x - 1) * x / 2;
    return rez % mod;
}

int main() {
    int i, j, n, minn;
    long long rez = 0;
    cin >> n;
    for( i = 0; i < n; i++ )
        cin >> h[i];
    for( i = 0; i < n; i++ )
        cin >> w[i];
    for( i = 0; i < n; i++ ) {
        minn = h[i];
        rez = ( rez + comb2(w[i] ) * comb2(h[i] ) ) % mod;
        //cout << rez << " ";
        for( j = i + 1; j < n; j++ ) {
            minn = min( minn, h[j] );
            rez = ( rez + w[i] * w[j] % mod * comb2( minn ) ) % mod;
            //cout << rez << " ";
        }
        //cout << "\n";
    }
    cout << rez;
    return 0;
}

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