求救 #include<bits/stdc++.h> using namespace std; int main(){ long long int x,y,n; cin>>x>>y>>n; if(n<10)cout<<n*(x-1)<<endl; else{ int a=n*(x-1),b=n%10; int c=(n-b)/10*(y-1)+b*(x-1); if(a<c)cout<<a<<endl; if(c<a)cout<<c<<endl; } return 0; }