Compilare: user.cpp: In function ‘int main()’: user.cpp:112:15: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] char *c = "cumainilecurate.in"; ^ user.cpp:130:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v.size(); ++i){ ^ user.cpp:137:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v.size(); ++i){ ^ user.cpp:153:17: warning: unused variable ‘old’ [-Wunused-variable] int old = a[inSort[pos]].first; ^ user.cpp:183:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=start+1; i<v.size(); ++i){ ^ user.cpp:117:9: warning: unused variable ‘st’ [-Wunused-variable] int st = 1; ^ user.cpp: In constructor ‘InputReader::InputReader(const char*)’: user.cpp:67:47: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, SIZE, 1, input_file); ^ user.cpp: In member function ‘void InputReader::advance()’: user.cpp:89:51: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, SIZE, 1, input_file); ^