兔清风的博客

题目链接：http://codeforces.com/contest/731/problem/B #include #define MX 200007 using namespace std; int ar[MX]; int main() { bool flag=1; int n; cin>>n; for(int i = 1;i>ar[i];

题目链接：http://codeforces.com/contest/731/problem/A #include #include using namespace std; char a[26]; int main() { string s; for(int i = 0; i < 26; i++) a[i] = 'a'+i; while(cin