Submission #1224228

#	Time	Username	Problem	Language	Result	Execution time	Memory
1224228		Ghulam_Junaid	Peru (RMI20_peru)	C++20	18 / 100	1098 ms	32144 KiB

peru

#include <bits/stdc++.h>
#include "peru.h"
// #include "grader.cpp"
using namespace std;

typedef long long ll;

const int N = 2.5e6 + 10, mod = 1e9 + 7;
int n, k, a[N], ngl[N];
ll p[N];

int solve(int nn, int kk, int* v){
    n = nn, k = kk;
    for (int i = 1; i <= n; i ++)
        a[i] = v[i - 1];

    stack<int> st;
    st.push(0);
    for (int i = 1; i <= n; i ++){
        while (!st.empty() and st.top() != 0 and a[st.top()] <= a[i])
            st.pop();
        ngl[i] = st.top();
        st.push(i);
    }

    deque<int> dq1, dq2;
    dq1.push_back(0); dq2.push_back(0);
    for (int i = 1; i <= n; i ++){
        while (!dq1.empty() and a[dq1.back()] <= a[i])
            dq1.pop_back();
        if (!dq1.empty() and dq1[0] <= i - k)
            dq1.pop_front();
        dq1.push_back(i);

        p[i] = 1e18;
        for (int j : dq1)
            p[i] = min(p[i], p[max(i - k, ngl[j])] + a[j]);
    }

    ll pw = 1, res = 0;
    for (int i = n; i > 0; i --, pw = (23ll * pw) % mod)
        res = (res + (1ll * (p[i] % mod) * pw % mod)) % mod;
    return res;
}

• Subtask 1: 18 / 18
• Subtask 2: 0 / 31
• Subtask 3: 0 / 51