Compilare: main.cpp: In function 'int main()': main.cpp:24:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s.size();i++) ~^~~~~~~~~ main.cpp:88:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<fp.size()) ~^~~~~~~~~~ main.cpp:20:16: warning: unused variable 'cnt' [-Wunused-variable] char x,a,b,cnt=0; ^~~ main.cpp: In function 'int pr(char)': main.cpp:12:1: warning: control reaches end of non-void function [-Wreturn-type] } ^