Submission #26492

#	Time	Username	Problem	Language	Result	Execution time	Memory
26492		samir_droubi	Brunhilda’s Birthday (BOI13_brunhilda)	C++14	8.10 / 100	1000 ms	10860 KiB

brunhilda

#include <bits/stdc++.h>
using namespace std;
int n,q;
map<int,int>dp;
const int mxn=(1e5)+5;
int a[mxn];
int mx=0;
int get(int up,int pr)
{
	if(up%pr==0)return -1;
	int dif=up-pr;
	int ans=pr+dif/pr;
	return ans;
}
int calc(int x)
{
	if(x<mx)return 1;
	if(dp.count(x))return dp[x];
	int ans=(1e9);
	for(int i=0;i<n;++i)
	{
		int num=get(x,a[i]);
		if(num==-1)continue;
		ans=min(ans,1+calc(num));
	}
	return dp[x]=ans;
}
int main()
{
	scanf("%d%d",&n,&q);
	for(int i=0;i<n;++i)
	{
		scanf("%d",&a[i]);
		mx=max(mx,a[i]);
	}
	for(int i=0;i<q;++i)
	{
		int x;
		scanf("%d",&x);
		int ans=calc(x);
		if(ans==(1e9))printf("oo\n");
		else printf("%d\n",ans);
	}
	return 0;
}

Compilation message (stderr)

brunhilda.cpp: In function 'int main()':
brunhilda.cpp:30:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&q);
                     ^
brunhilda.cpp:33:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a[i]);
                    ^
brunhilda.cpp:39:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&x);
                 ^

• Subtask 1: 3.3333333333333335 / 20
• Subtask 2: 3.3333333333333335 / 20
• Subtask 3: 1.4285714285714286 / 60