#include<bits/stdc++.h> using namespace std; int main() { int n,i,j,z,s=0; cin>>n; n*=10; for(i=1;i<n;i++){ for(j=1;j<n;j++){ for(z=1;z<n;z++){ if(i+j+z>30&&i*8+j*2+z==n){ s++; } } } } cout<<s; return 0; } /************************************************************** Problem: 1024 User: zzz Language: C++ Result: Accepted Time:15 ms Memory:2072 kb ****************************************************************/