Compilare: user.cpp: In function ‘int main()’: user.cpp:39:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < seg.size(); i++){ ^ user.cpp:46:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < seg.size(); i++){ ^ user.cpp:54:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < C[k].size() - 1; i++) ^ user.cpp:55:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i + 1; j < C[k].size(); j++) ^ user.cpp:58:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < C[k].size(); i+= 2) ^ user.cpp:69:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < trees.size(); i++) g << trees[i] << " "; ^