Compilare: main.cpp: In member function 'char InParser::read_ch()': main.cpp:24:38: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^ main.cpp: In function 'int main()': main.cpp:168:28: warning: assuming signed overflow does not occur when assuming that (X + c) >= X is always true [-Wstrict-overflow] for (j = l+1; j<=r; j++) ~^~~