Run id: 91017

Main.cc: In function 'int f(int, int)':
Main.cc:9:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: error: ld returned 1 exit status