#include<stdio.h>

int main( ) {
	int input_a;
	int input_b;
	int answer_math;
	int count = 0;

	scanf("%d""%d",&input_a ,&input_b);

	answer_math = input_a + input_b;

	while( 1 ) {
		answer_math = answer_math / 10;
		count++;
		if( answer_math <= 0 ) {
			break;
		}
	}
	printf("%d",count);

	return 0;
}