Compilare: user.cpp: In function ‘int main()’: user.cpp:129:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < v[nod].size();j++) ^ user.cpp:100:9: warning: unused variable ‘gradMaxim’ [-Wunused-variable] int gradMaxim = 0; ^ user.cpp: In function ‘char read_ch()’: user.cpp:34:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(_in_buff, 1, 4096, _fin); ^ user.cpp: In function ‘int main()’: user.cpp:99:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("gminmax.out", "w", stdout); ^