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Create Sum of Variable Length Subarrays.java

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	`1`	`+classSolution {`
	`2`	`+publicintsubarraySum(int[]nums) {`
	`3`	`+intn =nums.length;`
	`4`	`+int[]prefixSum =newint[n];`
	`5`	`+intsum =0;`
	`6`	`+intresult =0;`
	`7`	`+for (inti =0;i <n;i++) {`
	`8`	`+sum +=nums[i];`
	`9`	`+prefixSum[i] =sum;`
	`10`	`+intstart =Math.max(0,i -nums[i]);`
	`11`	`+intsubarraySum =prefixSum[i];`
	`12`	`+if (start >0) {`
	`13`	`+subarraySum -=prefixSum[start -1];`
	`14`	`+ }`
	`15`	`+result +=subarraySum;`
	`16`	`+ }`
	`17`	`+returnresult;`
	`18`	`+ }`
	`19`	`+}`

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