Submission #421060

#	Time	Username	Problem	Language	Result	Execution time	Memory
421060		LouayFarah	Horses (IOI15_horses)	C++14	17 / 100	83 ms	96200 KiB

horses

#include "bits/stdc++.h"
#include "horses.h"
using namespace std;
 
const int MOD = 1e9+7;

int n;
vector<int> x, y;
vector<vector<int>> dp(1001, vector<int>(10001, -1));

int solve(int h, int i, int curr)
{
    if(i==n)
    {
        return dp[h][curr] = curr;
    }

    if(h==0)
        return dp[h][curr] = curr;

    if(dp[h][curr]!=-1)
        return dp[h][curr];

    int t = h*x[i];

    int maxi = curr;
    int j = 0;
    maxi = max(maxi, solve(t - j, i+1, (curr%MOD + ((j%MOD)*(y[i])%MOD)%MOD))%MOD);

    j = t;
    maxi = max(maxi, solve(t - j, i+1, (curr%MOD + ((j%MOD)*(y[i])%MOD)%MOD))%MOD);

    j = t-1;
    maxi = max(maxi, solve(t - j, i+1, (curr%MOD + ((j%MOD)*(y[i])%MOD)%MOD))%MOD);

    j = 1;
    maxi = max(maxi, solve(t - j, i+1, (curr%MOD + ((j%MOD)*(y[i])%MOD)%MOD))%MOD);

    return maxi;
}

int init(int N, int X[], int Y[])
{
    n = N;
    x.assign(n, 0);
    y.assign(n, 0);

    for(int i = 0; i<n; i++)
    {
        x[i] = X[i];
        y[i] = Y[i];
    }

    int res = solve(1, 0, 0);
    return res;
}

int updateX(int pos, int val)
{
    x[pos] = val;
    int res = solve(1, 0, 0);
    return res;
}

int updateY(int pos, int val)
{
    y[pos] = val;
    int res = solve(1, 0, 0);
    return res;
}

• Subtask 1: 17 / 17
• Subtask 2: 0 / 17
• Subtask 3: 0 / 20
• Subtask 4: 0 / 23
• Subtask 5: 0 / 23