document.write('
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  1. #include <stdio.h>
  2.  
  3. int main( void )
  4. {
  5.     int n, i, j, cnt = 1;
  6.  
  7.     fputs("입력 : ", stdout);
  8.     scanf("%d", &n);
  9.  
  10.     for( i = 0; i < n; i++ ) {
  11.         for( j = 0; j < n; j++ )
  12.             printf("%3d ", cnt++);
  13.         puts("");
  14.     }
  15.  
  16.     return 0;
  17. }
');