Compilare: main.cpp: In function 'void join(int, int, int)': main.cpp:92:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<arbint[left].size() && j<arbint[right].size()){ ~^~~~~~~~~~~~~~~~~~~~ main.cpp:92:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<arbint[left].size() && j<arbint[right].size()){ ~^~~~~~~~~~~~~~~~~~~~~ main.cpp:102:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<arbint[left].size()){ ~^~~~~~~~~~~~~~~~~~~~ main.cpp:106:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<arbint[right].size()){ ~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'char read_ch()': main.cpp:36:33: 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); ^