P61,第九题
#include<bits/stdc++.h>
using namespace std;
int main(){
int n;
string s;
cin >> n;
cin >>s[1] >> s[2];
int FirstMin,SecondMin;
if(s[1]<s[2]){
FirstMin=s[1];
SecondMin=s[2];
}else{
FirstMin=s[2];
SecondMin=s[1];
}
for(int i = 3 ; i <= n ; i ++){
if(s[i]<SecondMin)
if(s[i]<FirstMin){
SecondMin = FirstMin;
FirstMin = s[i];
}else{
SecondMin = s[i];
}
}
cout << FirstMin << " " << SecondMin;
}