#include <stdio.h>

int main(void)
{
   int CurrentNum;
   int NextNum;
   int EventCount;
   int FiboCurrent;

   CurrentNum = 1;
   NextNum = 1;
   
   while(1) {
      
   FiboCurrent = NextNum+CurrentNum;

   if(FiboCurrent%2==0) EventCount+=FiboCurrent;
   if(FiboCurrent>=4000000) break;

   CurrentNum = NextNum;
   NextNum=FiboCurrent;
 
}
  
  printf("%d", EventCount);

 return 0;
}

4613732