Compilare: main.cpp: In function 'int main()': main.cpp:50:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s.size();i++) ~^~~~~~~~~ main.cpp:54:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=s.size();i++) ~^~~~~~~~~~ main.cpp:61:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=1;k<=s.size()-1;k++) ~^~~~~~~~~~~~ main.cpp:49:39: warning: unused variable 'dist' [-Wunused-variable] unsigned long long fact=1,fact1=1,dist=0; ^~~~