Compilare: main.cpp: In function 'int main()': main.cpp:48:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < s.size(); i++) ~~^~~~~~~~~~ main.cpp:52:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < s.size(); i++) ~~^~~~~~~~~~ main.cpp:46:9: warning: unused variable 'dim' [-Wunused-variable] int dim, i, comp = 0, nr; ^~~