Compilare: user.cpp: In function ‘int main()’: user.cpp:49:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j + 1 < cycle[i].size(); j ++) { ~~~~~~^~~~~~~~~~~~~~~~~ user.cpp:68:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j + 1 < cycle[i].size(); j ++) { ~~~~~~^~~~~~~~~~~~~~~~~ user.cpp:64:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(cycle[i].size() == 3) ^