#include<iostream> using namespace std; int main(){ int qx=0,xm=0,xy=0,time=0,count=0; bool flag = false; while(qx + xm + xy <30){ flag = false; if(time % 2 ==0 && xm < 10){ xm= xm +1; flag = true; } if(time % 4 ==0 && xy < 10){ xy = xy +1; flag = true; } if(qx < 10){ qx = qx +1; flag = true; } if(flag){ count = count +1; } time ++; } cout<<count; return 0; }