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- #include<iostream>
- using namespace std;
- int main(){
- int a;
- while(cin>>a){
- for(int i=1;i<=a;i++){
- for(int j=1;j<=a*2;j++){
- cout<<(j>a-i&&j<a+i?"*":" ");
- }
- cout<<endl;
- }
- }
- return 0;
- }
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