Submission #991321

#	Time	Username	Problem	Language	Result	Execution time	Memory
991321		PagodePaiva	Fish 3 (JOI24_fish3)	C++17	9 / 100	1262 ms	7676 KiB

Main

#include<bits/stdc++.h>
#define int long long

using namespace std;

const int N = 3010;
int v[N];
int d, n;

int32_t main(){
    ios::sync_with_stdio(false); cin.tie(0);
    cin >> n >> d;
    for(int i = 1;i <= n;i++)
        cin >> v[i];
    int q;
    cin >> q;
    while(q--){
        int l, r;
        cin >> l >> r;
        int p = v[r];
        int res = 0;
        bool aux = true;
        for(int i = r-1;i >=l;i--){
            if(v[i] <= p) p = v[i];
            else{
                int t = v[i]-p;
                t = (t+d-1)/d;
                res += t;
                if(v[i] < t*d) {
                    aux = false;
                    break;
                }
                p = v[i]-t*d;
            }
        }
        if(!aux){
            cout << -1 << '\n';
            continue;
        }
        cout << res << '\n';
    }
    return 0;
}

• Subtask 1: 9 / 9
• Subtask 2: 0 / 7
• Subtask 3: 0 / 28
• Subtask 4: 0 / 20
• Subtask 5: 0 / 36