C++ :
#include<bits/stdc++.h> using namespace std; string s[100]; int n,sum; int main() { cin>>n; for(int i=0;i<n;i++) cin>>s[i]; for(int i=0;i<n;i++) for(int j=0;j<s[i].size();j++) if(s[i][j]=='a') {sum++;break;} cout<<sum; return 0; }
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