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141MS险过,谨记1!+2!+......n!<(n+1)!就行!虽然一次AC,但效率不高,贴上代码仅供参考,如有优化感激不尽#include <stdio.h>
int find(int n)
{
if(n==0)
return 1;
else
return n*find(n-1);
}
int solve(int n,int k)
{
int i,flag=0;
for(i=9; i>=0; i--)
{
if(n==find(i)&&i<k)
{
flag=1;
break;
}
else if(n>find(i)&&i<k)
{
k=i;
break;
}
}
if(flag==0&&k>0)
solve(n-find(k),k);
else
return flag;
}
int main()
{
int n,i;
while(scanf("%d",&n),n>=0)
{
if(solve(n,10)==1)
printf("YES\n");
else
printf("NO\n");
}
return 0;
}
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