rj.cpp: In function 'int main()': rj.cpp:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result rj.cpp:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result rj.cpp:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result rj.cpp:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result rj.cpp:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result rj.cpp:48: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result rj.cpp:14: warning: 'lpr' may be used uninitialized in this function rj.cpp:14: warning: 'cpr' may be used uninitialized in this function rj.cpp:14: warning: 'lpj' may be used uninitialized in this function rj.cpp:14: warning: 'cpj' may be used uninitialized in this function rj.cpp:14: warning: 'lmin' may be used uninitialized in this function rj.cpp:14: warning: 'cmin' may be used uninitialized in this function