Compilare: main.cpp: In function 'void divideetimpera(int, int)': main.cpp:123:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h = 0; h < active[i].size(); h++){ ~~^~~~~~~~~~~~~~~~~~ main.cpp:142:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h = 0; h < active[i].size(); h++){ ~~^~~~~~~~~~~~~~~~~~ main.cpp:151:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h = 0; h < active[i].size(); h++) ~~^~~~~~~~~~~~~~~~~~ main.cpp:158:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h = 0; h < active[i].size(); h++) ~~^~~~~~~~~~~~~~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:17:29: 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); ^