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OI-codes/AcWing/727/727.cpp

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