Compilare: main.cpp: In function 'int main()': main.cpp:128:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < Stanga[i].size(); ++j) { ~~^~~~~~~~~~~~~~~~~~ main.cpp:132:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < Dreapta[i].size(); ++j) { ~~^~~~~~~~~~~~~~~~~~~ main.cpp:139:17: warning: ignoring return value of 'int system(const char*)', declared with attribute warn_unused_result [-Wunused-result] system("PAUSE"); ^