Submission #639278

#	Time	Username	Problem	Language	Result	Execution time	Memory
639278		blue	Peru (RMI20_peru)	C++17	0 / 100	1 ms	340 KiB

peru

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

using vi = vector<int>;
using pii = pair<int, int>;
using ll = long long;
using vll = vector<ll>;

const ll inf = 1'000'000'000'000'000'000LL;
const ll mod = 1'000'000'007;

ll mul(ll a, ll b)
{
    return (a*b)%mod;
}

ll ad(ll a, ll b)
{
    return (a+b)%mod;
}

int solve(int N, int K, int* v)
{
    vll dp(1+N, inf);
    dp[0] = 0;
    for(int i = 1; i <= N; i++)
    {
        int rmx = 0;
        for(int j = i-1; j >= i-K && j >= 0; j--)
        {
            rmx = max(rmx, v[j+1 - 1]);
            dp[i] = min(dp[i], dp[j] + rmx);
        }

        // cerr << i << " : " << dp[i] << '\n';
    }

    ll res = 0;
    ll coeff = 1;
    for(int i = N; i >= 1; i--)
    {
        res = ad(res, mul(dp[i], coeff));
        coeff = mul(coeff, 23);
    }

    return res;
}

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