Submission #990828

#	Time	Username	Problem	Language	Result	Execution time	Memory
990828		grt	Fish 3 (JOI24_fish3)	C++17	0 / 100	2062 ms	12428 KiB

Main

#include <bits/stdc++.h>
#define ST first
#define ND second
#define PB push_back

using namespace std;
using ll = long long;
using pi = pair<int, int>;
using vi = vector<int>;

const int nax = 300 * 1000 + 10;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, q, d;
    cin >> n >> d;
    vector<ll> a(n);
    for (ll &x : a) cin >> x;
    cin >> q;

    while (q--) {
        int l, r;
        cin >> l >> r;
        l--, r--;
        ll ans = 0;
        ll open = 0;
        for (int i = r; i >= l; --i) {
            ll dif = (i == l ? a[i] : a[i] - a[i - 1]);
            ll demand = 0;
            if (dif < 0) {
                demand = (abs(dif) - 1) / d + 1;
            } else {
                demand = - (dif / d);
            }
            if (demand > 0) {
                ans += (ll)i * demand;
                open += demand;
            } else {
                ll me = min(-demand, open);
                ans -= me * i;
                open -= me;
            }
        }
        if (open > 0) cout << "-1\n";
        else cout << ans << "\n";

    }
}

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