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var magicNumbers = [1, -1, 0, 0]; var magicIndex = 0; var sum = 0; function foo(n) { for (var i = 0; i < n; ++i) { sum += 10; bar(); } } function bar() { var q = magicNumbers[magicIndex++]; if (q != -1) { sum += 1; foo(q); } } foo(3); assertEq(sum, 43);