Compilare: main.cpp: In function 'int main()': main.cpp:51:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0 ; i < stv.size() ; i++) ~~^~~~~~~~~~~~ main.cpp:52:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = i + 1 ; j < stv.size() ; j++) ~~^~~~~~~~~~~~ main.cpp:56:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0 ; i < stv.size() ; i++) ~~^~~~~~~~~~~~ main.cpp:62:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0 ; i < stv.size() ; i++) ~~^~~~~~~~~~~~