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#include <assert.h>
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int x;
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int *p1;
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int **p2;
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void initialize()
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{
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x = 3;
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p1 = &x;
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p2 = &p1;
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}
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void checkpoint()
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{
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}
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int main()
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{
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initialize();
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checkpoint();
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assert(&p1 == *p2);
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assert(*p2 == p1);
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assert(*p1 == 3);
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assert(*p2 == &x);
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assert(**p2 == x);
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return 0;
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}
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