A - Hitachi String
#include <bits/stdc++.h> #define ll long long using namespace std; char s[15]; int main() { //freopen("in.txt","r",stdin); scanf("%s",s); int n=strlen(s); if(n&1) printf("No\n"); else { bool f=true; for(int i=0;i<n;i+=2) { if(s[i]!='h'||s[i+1]!='i') f=false; } printf("%s\n",f?"Yes":"No"); } return 0; }