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#include <stdio.h>
int digitCount(int n){
int counts=0;
while(n!=0){
counts++;
n=n/10;
}
return counts;}
int main()
{
int n;
scanf("%d",&n);
int resut=digitCount(n);
if(n==0)
resut=1;
printf("%d",resut);
return 0;
}