666

好难

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O不OK

#include<bits/stdc++.h> using namespace std; int main(){ int n; cin>>n; char a=''; for(int i=1;i<=n;i++){ for(int j=1;j<=n-i;j++){ cout<<" "; } for(int j=1;j<=2i-1;j++){ cout<<a; } cout<<endl; } for(int i=1;i<=n;i++){ for(int j=1;j<=n-1;j++){ cout<<" "; } cout<<"*"<<endl; } return 0; }