#include <stdio.h>
int custom_strlen(const char *str) {
int length = 0;
while (str[length] != '\0') {
length++; // Count until null terminator
}
return length;
}
int main() {
char str[101];
fgets(str, 20, stdin);
/* Remove newline if present
int i = 0;
while (str[i] != '\0') {
if (str[i] == '\n') {
str[i] = '\0';
break;
}
i++;
}*/
printf("%d", custom_strlen(str));
return 0;
}