Compilare: main.cpp: In function 'int main()': main.cpp:21:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<s.size();++j) ~^~~~~~~~~ main.cpp:24:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s.at(j)=='*' && j<s.size()) ~^~~~~~~~~ main.cpp:101:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<s.size();++j) ~^~~~~~~~~ main.cpp:111:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k==s.size()) ~^~~~~~~~~~ main.cpp:117:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k==s.size()) ~^~~~~~~~~~ main.cpp:135:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<s.size();++j) ~^~~~~~~~~ main.cpp:145:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k==s.size()) ~^~~~~~~~~~ main.cpp:151:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k==s.size()) ~^~~~~~~~~~