blis.cpp:29: warning: this decimal constant is unsigned only in ISO C90 blis.cpp:64: warning: this decimal constant is unsigned only in ISO C90 blis.cpp: In function 'int main()': blis.cpp:27: warning: comparison between signed and unsigned integer expressions blis.cpp:28: warning: comparison between signed and unsigned integer expressions blis.cpp:35: warning: comparison between signed and unsigned integer expressions blis.cpp:45: warning: comparison between signed and unsigned integer expressions blis.cpp:18: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result blis.cpp:19: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result blis.cpp:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result blis.cpp:21: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/ccegURQW.o: In function `main': blis.cpp:(.text+0xa7): warning: the `gets' function is dangerous and should not be used.