unific.cpp: In function 'int main()': unific.cpp:110: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result unific.cpp:111: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result unific.cpp:114: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result unific.cpp:115: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result unific.cpp:112: warning: 'cmax' may be used uninitialized in this function