dominant.cpp: In function 'int main()': dominant.cpp:15: warning: operation on 'n' may be undefined dominant.cpp:17: warning: operation on 'n' may be undefined dominant.cpp:7: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result dominant.cpp:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result dominant.cpp:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result