Difference between revisions of "2020 CCPC Online Contest"
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== Problem B == | == Problem B == | ||
| + | Solved by all 02:24:09(-1) | ||
| + | 每个节点向其某个质因子连边，之后所有素数向 $2$ 连边。答案即为区间自然数和加上区间素数和，用 min25 筛出即可。 | ||
| + | |||
== Problem C == | == Problem C == | ||
== Problem D == | == Problem D == | ||
Revision as of 13:58, 23 September 2020
Problem A
Unsolved.
Problem B
Solved by all 02:24:09(-1) 每个节点向其某个质因子连边，之后所有素数向 $2$ 连边。答案即为区间自然数和加上区间素数和，用 min25 筛出即可。