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import 'dart:io'; void printPattern() { int size = 11; for (int i = 0; i < size; i++) { for (int j = 0; j < size - i; j++) { stdout.write(' '); } for (int k = 0; k <= i; k++) { int num = (k + i) % 10; stdout.write('$num '); } for (int l = i - 1; l >= 0; l--) { int num = (l + i) % 10; stdout.write('$num '); } stdout.write('\n'); } for (int i = size -2; i >= 0; i--) { for (int j = 0; j < size - i; j++) { stdout.write(' '); } for (int k = 0; k <= i; k++) { int num = (k + i) % 10; stdout.write('$num '); } for (int l = i - 1; l >= 0; l--) { int num = (l + i) % 10; stdout.write('$num '); } stdout.write('\n'); } } void main() { printPattern(); }
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