Compilare: main.cpp: In function 'void connect_cc()': main.cpp:47:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < comp.size() - 1; ++i) { ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void connect2()': main.cpp:64:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < izo.size() - 1; ++i) { ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int searchNode()': main.cpp:76:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < comp.size(); ++i) { ~~^~~~~~~~~~~~~ main.cpp: In function 'void connect1()': main.cpp:88:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < izo.size(); ++i) { ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:115:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(freeNodes >= izo.size()) { ~~~~~~~~~~^~~~~~~~~~~~~