63 lines
869 B
Plaintext
63 lines
869 B
Plaintext
var
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f: text;
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n, i: int16;
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a, b: array of int32;
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procedure swp(var x, y: int32);
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var
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tmp: int32;
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begin
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tmp := x;
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x := y;
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y := tmp
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end;
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procedure qsort(l, h: int16);
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var
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i, j: int16;
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tmp: int32;
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begin
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i := l;
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j := h;
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tmp := a[(l + h) div 2];
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repeat
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while a[i] < tmp do
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inc(i);
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while a[j] > tmp do
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dec(j);
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if i <= j then
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begin
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swp(a[i], a[j]);
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swp(b[i], b[j]);
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inc(i);
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dec(j)
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end;
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until i > j;
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if l < j then
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qsort(l, j);
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if i < h then
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qsort(i, h)
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end;
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begin
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assign(f, 'CLB.IN');
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reset(f);
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readln(f, n);
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setlength(a, n);
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setlength(b, n);
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for i := 0 to n - 1 do
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readln(f, a[i], b[i]);
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close(f);
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qsort(0, n - 1);
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for i := 0 to n - 1 do
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writeln(a[i], ' ', b[i])
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end.
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