24 lines
386 B
C#
24 lines
386 B
C#
using System;
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class ArithmeticProgression : Progression
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{
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private int a0;
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private int b;
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public ArithmeticProgression(int a0, int b)
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{
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this.a0 = a0;
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this.b = b;
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}
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public override int GetElement(int k)
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{
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return a0 + (k - 1) * b;
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}
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public override int Sum(int n)
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{
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return (2 * a0 + (n - 1) * b) * n / 2;
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}
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}
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