Submission #155728

#	Time	Username	Problem	Language	Result	Execution time	Memory
155728		souhhcong	Brunhilda’s Birthday (BOI13_brunhilda)	C++14	23.65 / 100	1101 ms	212472 KiB

brunhilda

#include <iostream>
#include <string.h>
using namespace std;

const int N = 1e5+5, MAXN = 1e7+7, INF = 1e9+9;
int n, q, x, p[N], dp[MAXN], mx = 0;

int solve(int x)
{
    //cout << x << endl;
    if (dp[x] != -1)
        return dp[x];
    int mn = INF;
    for (int i = 0; i < n; i++)
    {
        if (!(x-x/p[i]*p[i])) continue;
        mn = min(mn,solve(x/p[i]*p[i])+1);
    }
    dp[x] = mn;
    return dp[x];
}

int main()
{
    memset(dp,-1,sizeof dp);
    scanf("%d %d",&n,&q);
    for (int i = 0; i < n; i++)
    {
        scanf("%d",&p[i]);
        mx = max(mx,p[i]);
    }
    for (int i = 1; i < mx; i++)
        dp[i] = 1;
    while(q--)
    {
        scanf("%d",&x);
        solve(x);
        if (dp[x] == INF) printf("oo\n");
        else printf("%d\n",dp[x]);
    }
}

Compilation message (stderr)

brunhilda.cpp: In function 'int main()':
brunhilda.cpp:26:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d",&n,&q);
     ~~~~~^~~~~~~~~~~~~~~
brunhilda.cpp:29:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&p[i]);
         ~~~~~^~~~~~~~~~~~
brunhilda.cpp:36:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&x);
         ~~~~~^~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 2.2222222222222223 / 20
• Subtask 3: 1.4285714285714286 / 60