#include <stdio.h>

#define SIZE 10

int main() {
    char coefs[SIZE] = {0} ;
    int x = 0;
    int input;
    int count = 0;
    
    while (input != EOF || input != '\n'){
    	coefs[SIZE] = input;
	count ++;
    }

    printf("%d\n", coefs[SIZE]);


    return 0;
}