Compilare: main.cpp: In function 'int main()': main.cpp:32:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sir1.size(); i++) ~~^~~~~~~~~~~~~ main.cpp:56:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sir1.size(); i++) ~~^~~~~~~~~~~~~ main.cpp:69:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = sir1.size(); i < sir2.size(); i++) ~~^~~~~~~~~~~~~ main.cpp:88:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sol.size(); i++) ~~^~~~~~~~~~~~