Commitf92337a

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refactor 1570

1 parentd1a1547 commitf92337aCopy full SHA for f92337a

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Original file line number	Diff line number	Diff line change
`@@ -2,6 +2,9 @@`
`2`	`2`
`3`	`3`	`publicclass_1570 {`
`4`	`4`	`publicstaticclassSolution1 {`
	`5`	`+/**This is a brute force but accepted solution.`
	`6`	`+ * More optimal solution:`
	`7`	`+ * use a map to store only non-zero values and use the smaller vector to do multiplication to reduce space and save time.*/`
`5`	`8`	`classSparseVector {`
`6`	`9`	`int[]vector;`
`7`	`10`

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