Compilare: main.cpp: In function 'bool cup(int)': main.cpp:62:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < cuplaj[x].size(); i++) { ~~^~~~~~~~~~~~~~~~~~ main.cpp:70:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < cuplaj[x].size(); i++) { ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:109:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < q1.size(); i++) { ~~^~~~~~~~~~~ main.cpp:121:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < q2.size(); i++) { ~~^~~~~~~~~~~