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水过0ms#include<stdio.h>
#include<math.h>
int main(){
__int64 x,z;
int i,y,p;
while(1){
scanf("%I64d",&x);
if(x==0)break;
if(x==1||x==-1)continue;
p=1;
if(x>0){
for(i=2;;i++){
y=(int)pow(x*1.0,1.0/i);
if(y<2)break;
z=(__int64)pow(y+0.0,i);
if(x==z)p=i;
else{
z=(__int64)pow(y+1.0,i);
if(x==z)p=i;
}
}
}else{
x=-x;
for(i=3;;i+=2){
y=(int)pow(x*1.0,1.0/i);
if(y<2)break;
z=(__int64)pow(y+0.0,i);
if(x==z)p=i;
else{
z=(__int64)pow(y+1.0,i);
if(x==z)p=i;
}
}
}
printf("%d\n",p);
}
return 0;
}
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