private static int calu(int number) { var sum = 0; if (number % 2 == 0) sum = -(number / 2); else sum = -(number - 1) / 2 + number; return sum; }
private static void main(string[] args) { console.writeline(calu(1)); console.writeline(calu(2)); console.writeline(calu(3)); console.writeline(calu(4)); console.writeline(calu(5)); console.writeline(calu(6)); console.readline(); }
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