easy.c: In function 'main':
easy.c:7:7: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
easy.c:10:8: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
easy.c:21:1: warning: control reaches end of non-void function [-Wreturn-type]
/tmp/ccUkTUIq.o: In function `main':
easy.c:(.text.startup+0x0): multiple definition of `main'
/tmp/ccfrI6gh.o:grader.c:(.text.startup+0x0): first defined here
/tmp/ccfrI6gh.o: In function `main':
grader.c:(.text.startup+0x97): undefined reference to `CountPair'
collect2: ld returned 1 exit status