Compilare: main.cpp: In function 'void print(int, int)': main.cpp:73:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < res[last].size(); ++i) ~~^~~~~~~~~~~~~~~~~~ main.cpp:83:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = res[last].size() - p; i < res[last].size(); ++i) ~~^~~~~~~~~~~~~~~~~~ main.cpp: At global scope: main.cpp:87:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] main() ^