easy.cpp:2:27: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
easy.cpp: In function 'int main()':
easy.cpp:2:43: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
easy.cpp:2:75: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
/tmp/ccDWp4ub.o: In function `main':
easy.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/ccO7O8Rn.o:grader.cpp:(.text.startup+0x0): first defined here
/tmp/ccO7O8Rn.o: In function `main':
grader.cpp:(.text.startup+0x97): undefined reference to `CountPair(int, int*)'
collect2: ld returned 1 exit status
