Compilare: main.cpp: In function 'bool solve(ush, std::vector<std::pair<short unsigned int, short unsigned int> >, ush)': main.cpp:46:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < aux.size(); ++i ){ ~~^~~~~~~~~~~~ main.cpp:65:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < aux.size(); ++i ){ ~~^~~~~~~~~~~~ main.cpp:84:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < aux.size(); ++i ){ ~~^~~~~~~~~~~~ main.cpp:103:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < aux.size(); ++i ){ ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:141:40: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread( buffer, DIM, 1, fin ), p = 0; ^ main.cpp: In function 'void citeste(ush&)': main.cpp:130:48: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread( buffer, DIM, 1, fin ), p = 0; ^ main.cpp:136:48: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread( buffer, DIM, 1, fin ), p = 0; ^