话不多说
#include <iostream> #include <iomanip> using namespace std; int main() { int a; cin>>a; int b=a%10; a%=10; while(b>10) { a=b; b=a%10; } cout<<a<<endl; return 0; }
话不多说
#include <iostream> #include <iomanip> using namespace std; int main() { int a; cin>>a; int b=a%10; a%=10; while(b>10) { a=b; b=a%10; } cout<<a<<endl; return 0; }