#include <stdio.h> int main () { long int cpf=0, cpf2=0; int a=0, b=1, c=0, d=0, e=0, f=0, g=0, h=0, i=0, j=0; // 123456789 scanf("%ld", &cpf); a = (cpf % 10)*2; b = (((cpf - a/2)/10)%10)*3; c = (((cpf - b/3)/100)%10)*4; d = (((cpf - c/4)/1000)%10)*5; e = (((cpf - d/5)/10000)%10)*6; f = (((cpf - e/6)/100000)%10)*7; g = (((cpf - f/7)/1000000)%10)*8; h = (((cpf - g/8)/10000000)%10)*9; i = (((cpf - h/9)/100000000)%10)*10; // printf ("%d %d %d %d\n", a , b, c, d); int resto1 = (a+b+c+d+e+f+g+h+i)%11; if (resto1==0 || resto1 ==1) { printf ("%d", 0); cpf2 = 10 * cpf; } else { printf("%d", 11- resto1); cpf2 = 10 * cpf + 11 - resto1; } // printf ("\n%ld\n", cpf2); a = (cpf2 % 10)*2; b = (((cpf2 - a/2)/10)%10)*3; c = (((cpf2 - b/3)/100)%10)*4; d = (((cpf2 - c/4)/1000)%10)*5; e = (((cpf2 - d/5)/10000)%10)*6; f = (((cpf2 - e/6)/100000)%10)*7; g = (((cpf2 - f/7)/1000000)%10)*8; h = (((cpf2 - g/8)/10000000)%10)*9; i = (((cpf2 - h/9)/100000000)%10)*10; j = (((cpf2 - h/10)/1000000000)%10)*11; resto1 = (a+b+c+d+e+f+g+h+i+j)%11; if (resto1==0 || resto1 ==1) { printf ("%d\n", 0); // cpf2 = 10 * cpf; } else { printf("%d\n", 11- resto1); // cpf2 = cpf = 10 * cpf + 11 - resto1; } return 0; }