//Determine the number of positive integers x, where x is
//less than equal to 9,999,999 and the sum of the digits in x is 31.
#include <iostream>
using namespace std;

int main()
{


int a=0;
int b=0;
int c=0;
int d=0;
int e=0;
int f=0;
int g=0;
int solution=0;

while (1000000*a+100000*b+10000*c+1000*d+100*e+10*f+g<=9999999){
if (a+b+c+d+e+f+g==31){
        solution++;
    if (g<9)
       g++;
    else{
    if (f<9)
            f++;
    else{
            f=0;
            if (e<9)
                e++;
            else{
                e=0;
                if (d<9)
                    d++;
                else{
                    d=0;
                    if (c<9)
                        c++;
                    else{
                        c=0;
                        if (b<9)
                            b++;
                        else{
                            b=0;
                            if (a<9){
                                a++;}}}}}}}}}
cout << solution;
return 0;
}