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Re:其实这道题可以用这个公式In Reply To:Re:其实这道题可以用这个公式 Posted by:AB38017032 at 2012-07-30 15:44:52 先打表,再算
#include <stdio.h>
#include <math.h>
int a[10000001]={0};
int main()
{
int n,len,j,m;
double i,sum=0.0;
for(i=1.0;i<10000001;i++)
{
sum+=log10(i);
a[(int)(i)]=(int)(sum)+1;
}
scanf("%d",&n);
/*sum=0.0;
for(i=1.0;i<=(double)(n);i++)
sum+=log10(i);
len=(int)(sum)+1;*/
for(j=0;j<n;j++)
{
scanf("%d",&m);
printf("%d\n",a[m]);
}
return 0;
}
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