Compilare: main.cpp: In function 'int main()': main.cpp:20:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<cuv.size();++i) ~^~~~~~~~~~~ main.cpp:24:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<s.size();++i) ~^~~~~~~~~ main.cpp:26:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<cuv.size();++i) ~^~~~~~~~~~~ main.cpp:28:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1;j<s.size();++j) ~^~~~~~~~~ main.cpp:32:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1;j<s.size();++j) { ~^~~~~~~~~ main.cpp:38:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1;j<s.size();++j) { ~^~~~~~~~~