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GitBook: [greyireland#111] No subject

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suan-fa-si-wei
- sampling-fang-fa.md

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`‎suan-fa-si-wei/sampling-fang-fa.md‎`

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Original file line number	Diff line number	Diff line change
`@@ -6,5 +6,20 @@`
`6`	`6`
`7`	`7`	```cpp
`8`	`8`	`// Some cc++`
`9`		`-`
	`9`	`+// transfer rand7 to rand10.`
	`10`	`+class Solution {`
	`11`	`+public:`
	`12`	`+ int rand10() {`
	`13`	`+`
	`14`	`+ // [1 7] (rand7()-1) * 7 + rand7() -1 [ 0 48] >=40. descard.`
	`15`	`+ int random = 49;`
	`16`	`+ while(random>=40)`
	`17`	`+ {`
	`18`	`+ random = (rand7()-1)*7 + rand7() -1;`
	`19`	`+ }`
	`20`	`+`
	`21`	`+ return random%10+1;`
	`22`	`+`
	`23`	`+ }`
	`24`	`+};`
`10`	`25`	```

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