#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() using namespace std; int main(){ int a=1,b=1,c=1,h=0,p=0,sum=1; while(a+b+c<30){ p=0; h++; if(a<10){ p=1; a+=1; } if(b<10&&h%2==0){ p=1; b+=1; } if(c<10&&h%4==0){ p=1; c+=1; } if(p==1){ sum+=1; } } cout<<sum; return 0; }