Compilare: main.cpp: In function 'int query(int, int, int)': main.cpp:81:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(r1 + pas < sumamare[d].size() && sumamare[d][r1 + pas] < l) ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~ main.cpp:90:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(r2 + pas < sumamare[d].size() && sumamare[d][r2 + pas] <= r) ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:31:38: 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); ^