Submission #155738

#	Time	Username	Problem	Language	Result	Execution time	Memory
155738		souhhcong	Brunhilda’s Birthday (BOI13_brunhilda)	C++14	2.22 / 100	86 ms	40212 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];

int solve(int x)
{
    //cout << x << endl;
    if (dp[x] != -1)
        return dp[x];
    int mn = INF;
    for (int i = n-1; i >= 0; i--)
    {
        if (!(x%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]);
    }
    for (int i = 1; i < p[n-1]; i++)
        dp[i] = 1;
    while(q--)
    {
        scanf("%d",&x);
        if (x < p[n-1]) printf("%d\n",dp[x]);

        int tmp = 1;
        for (int i = 0; i < n-1; i++)
        {
            tmp *= p[i];
            if (tmp > x) break;
        }
        if (tmp > x)
        {
            if (x % p[n-1] == 0)
            {
                printf("%d\n",2*x/p[n-1]);
            }
            else
            {
                printf("%d\n",2*x/p[n-1]+1);
            }
        }
        else
        {
            bool check = 1;
            for (int i = 0; i < n-1; i++)
            {
                if (x % p[i] != 0) check = 0;
            }
            if (check) printf("oo\n");
            else
            {
                if (x % p[n-1] == 0)
                {
                    printf("%d\n",2*(x/p[n-1]));
                }
                else
                {
                    printf("%d\n",2*(x/p[n-1])+1);
                }
            }
        }
    }
}

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:35:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&x);
         ~~~~~^~~~~~~~~

• Subtask 1: 0 / 20
• Subtask 2: 2.2222222222222223 / 20
• Subtask 3: 0 / 60