Submission #750611

#	Time	Username	Problem	Language	Result	Execution time	Memory
750611		dmot	Rabbit Carrot (LMIO19_triusis)	C++17	0 / 100	1 ms	212 KiB

triusis

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pi = pair<int, int>;

int main() {
    cin.tie(0)->sync_with_stdio(0);
    cin.exceptions(cin.failbit);
    
    int n; cin >> n;
    ll m; cin >> m;
    vector<ll> a(n+1);
    for (int i = 1; i <= n; ++i) cin >> a[i];
    vector<ll> dp(n+1, -1e7);
    dp[0] = 0;

    vector<pair<ll, int>> st;

    st.push_back({0, 0});

    for (int i = 1; i <= n; ++i) {

        while (st.size() && ((st.front().first + m * (i - st.front().second)) < a[i])) {
            st.pop_back();
        }

        if (!st.size()) {
            // need to change all of them
            // cerr << "i : " << i << endl;
            dp[i] = i;
            st.push_back({m * i, i});
        } else {
            dp[i] = 1 + dp[st.front().second];
            st.push_back({a[i], i});
        }
    }
    cout << dp[n] << endl; 
    return 0;
}

• Subtask 1: 0 / 14
• Subtask 2: 0 / 21
• Subtask 3: 0 / 28
• Subtask 4: 0 / 37