20 lines
352 B
C++
20 lines
352 B
C++
#include <iostream>
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int main()
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{
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int square = 1, increment = 3;
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for (int door = 1; door <= 100; ++door)
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{
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std::cout << "door #" << door;
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if (door == square)
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{
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std::cout << " is open." << std::endl;
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square += increment;
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increment += 2;
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}
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else
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std::cout << " is closed." << std::endl;
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}
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return 0;
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}
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