Submission #820142

#	Time	Username	Problem	Language	Result	Execution time	Memory
820142		PurpleCrayon	Dungeon 3 (JOI21_ho_t5)	C++17	0 / 100	4067 ms	4568 KiB

Main

#include <bits/stdc++.h>
using namespace std;

#define sz(v) int(v.size())
#define ar array
typedef long long ll;
const int N = 5e2+10, MOD = 998244353;

void solve() {
    int n, m; cin >> n >> m;
    vector<int> a(n); for (auto& x : a) cin >> x;
    vector<int> b(n); for (auto& x : b) cin >> x;

    while (m--) {
        int l, r, cap; cin >> l >> r >> cap, --l, --r;
        deque<pair<int, int>> st;

        ll ans = 0;
        for (int i = l; i < r; i++) {
            int need = a[i], cost = b[i];
            while (sz(st) && b[st.back().first] >= cost) st.pop_back();
            st.emplace_back(i, cap);

            while (sz(st) && need) {
                int cur = min(st.front().second, need); need -= cur;
                ans += (long long) b[st.front().first] * cur;
                for (auto& [x, y] : st) y -= cur;

                while (sz(st) && st.front().second == 0) st.pop_front();
            }

            if (need) {
                ans = -1;
                break;
            }
        }

        cout << ans << '\n';
    }
}

int main() {
    ios::sync_with_stdio(false); cin.tie(0);
    int T = 1;
    // cin >> T;
    while (T--) solve();
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 14
• Subtask 3: 0 / 31
• Subtask 4: 0 / 44