#include <stdio.h>
void main(void){
	int fruits[3];

	for(int i = 0;i < 3;i++){
		scanf("%d",&fruits[i]);
	}
	if(fruits[0] == fruits[1] && fruits[0] == fruits[2]){
		printf("1");
	}else if(fruits[0] != fruits[1] && fruits[0] != fruits[2] && fruits[1] != fruits[2]){
		printf("0");
	}else{
		printf("2");
	}
}