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								23/10/Q2652.h
									
									
									
									
									
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								23/10/Q2652.h
									
									
									
									
									
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//
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// Created by 李洋 on 2023/10/17.
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//
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#ifndef LEECODE_C_Q2652_H
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#define LEECODE_C_Q2652_H
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class Q2652 {
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public:
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    int f(int n, int m) {
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        return (m + n / m * m) * (n / m) / 2;
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    }
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    int sumOfMultiples(int n) {
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        return f(n, 3) + f(n, 5) + f(n, 7) - f(n, 3 * 5) - f(n, 3 * 7) - f(n, 5 * 7) + f(n, 3 * 5 * 7);
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    }
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};
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#endif //LEECODE_C_Q2652_H
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