题解 | #删数#
星际穿越
http://www.nowcoder.com/practice/53e4c208b8cf497086ecd65ef45349bb
include<stdio.h>
include<math.h>
int main()
{
long h;
while(scanf("%ld",&h)!=EOF)
{
for(long i=sqrt(h);i>0;i--)
{
if(h==1)
{
printf("0\n");
}
if((i*i+i)<=h)
{
printf("%ld\n",i);
break;
}
}
}
return 0;}