C :

#include "stdio.h"
int main()
{
    int n=31;
    printf("%d\n",n);
}

C++ :

#include<bits/stdc++.h>
using namespace std;
int main()
{cout<<31;
}

Pascal :

var i,j,k,l,h,g,sum:longint;
f:array[0..42] of boolean;
begin
for i:=0 to 1 do
     for j:=0 to 1 do
         for k:=0 to 1 do
             for l:=0 to 1 do
                 for h:=0 to 1 do
                     for g:=0 to 1 do
                          f[i*2+j*3+k*5+l*7+h*10+g*15]:=true;
for i:=1 to 42 do
     if f[i] then
        inc(sum);
     writeln(sum);
end.