Compilare: user.cpp: In function ‘int main()’: user.cpp:28:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<comp.size();i++){ ^ user.cpp:37:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<comp.size();j++) ^ user.cpp:40:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j==comp.size()) ^ user.cpp:43:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<comp.size();j++) ^ user.cpp:46:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j==comp.size()) ^ user.cpp:48:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<comp.size();i++){ ^ user.cpp:55:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<comp.size();j++) ^ user.cpp: In function ‘void build_cc(int)’: user.cpp:69:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<comp.size();i++){ ^ user.cpp:72:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<G[x].size();j++){ ^ user.cpp:78:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<comp.size();i++){ ^