HBC54304ICPC StandingsFractions题解

冷夕颜 算法基础篇 20 0
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You are given a positive integer n. Find a sequence of fractions ai / bi, i = 1…k for some k such that: bi divides n, 1 < bi < n for i = 1…k 1 ≤ ai < bi for i = 1…

You are given a positive integer n. Find a sequence of fractions ai / bi, i = 1…k (where ai and bi are positive integers) for some k such that: bi divides n, 1 < bi < n for i = 1…k 1 ≤ ai < bi for i = 1…k ∑i=1kaibi=1−1nsum_{i=1}^kfrac{a_i}{b_i}=1-frac1n∑i=1k​bi​ai​​=1−n1​

HBC54304ICPC StandingsFractions题解
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