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@@ -0,0 +1,27 @@
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+#include<bits/stdc++.h>
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+
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+using namespace std;
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+const int N = 21;
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+int a[N][N];
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+
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+int main() {
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+ int n;
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+ while (cin >> n) {
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+ for (int i = 0; i <= n; i++) {
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+ a[i][i] = a[i][0] = 1;
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+ }
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+ for (int i = 1; i <= n; i++)
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+ for (int j = 1; j < i; j++) {
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+ a[i][j] = a[i - 1][j - 1] + a[i - 1][j];
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+ }
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+ for (int i = 0; i < n; i++) {
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+ for (int j = 0; j <= i; j++) {
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+ if (j)cout << " ";
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+ cout << a[i][j];
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+ }
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+ cout << endl;
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+ }
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+ cout << endl;
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+ }
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+ return 0;
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+}
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