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Restructure Subset sum problem to have function return subset or None if not found

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Scripts
- Subset sum problem.py

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`‎Scripts/Subset sum problem.py‎`

Lines changed: 21 additions & 7 deletions

Original file line number	Diff line number	Diff line change
`@@ -28,36 +28,51 @@ def find_subset(weight, req_sum):`
`28`	`28`	`else:`
`29`	`29`	`dp_array[i][j]=dp_array[i-1][j]`
`30`	`30`
`31`		`- print("Subset for sum",req_sum,' :')`
`32`		`-`
`33`	`31`	`#Find out which Numbers should be in the subset`
`34`	`32`	`#give from index 0`
`35`	`33`	`row-=1`
`36`	`34`	`col-=1`
	`35`	`+ sum_subset=[]`
	`36`	`+`
	`37`	`+ #check if the Subset is possible : if not, return None`
	`38`	`+ if dp_array[row][col] != req_sum :`
	`39`	`+ return None`
	`40`	`+`
	`41`	`+ #get the subset`
`37`	`42`	`while col>=0 and row>=0 and req_sum>0:`
`38`	`43`	`#First Row`
`39`	`44`	`if(row==0):`
`40`		`- print(weight[row])`
	`45`	`+ sum_subset.append(weight[row])`
`41`	`46`	`break`
`42`	`47`
`43`	`48`	`#Bottom-Right most ele`
`44`	`49`	`if(dp_array[row][col]!=dp_array[row-1][col]):`
`45`	`50`	`# print(req_sum,' : ',dp_array[row][col],dp_array[row-1][col],' : ',weight[row])`
`46`		`- print(weight[row])`
	`51`	`+ sum_subset.append(weight[row])`
`47`	`52`	`req_sum-=weight[row]`
`48`	`53`	`col-=weight[row]`
`49`	`54`	`row-=1`
`50`	`55`	`else:`
`51`	`56`	`row-=1`
`52`	`57`
	`58`	`+ return sum_subset`
	`59`	`+`
	`60`	`+`
`53`	`61`	`#main`
`54`	`62`	`if __name__=="__main__":`
`55`	`63`	`array=list(map(int,input().split()))`
`56`	`64`	`req_sum=int(input())`
`57`	`65`
`58`	`66`	`#Sort by ascending order`
`59`	`67`	`array.sort()`
`60`		`- find_subset(array,req_sum)`
	`68`	`+ sum_subset = find_subset(array,req_sum)`
	`69`	`+`
	`70`	`+ #If Sum is not possible`
	`71`	`+ if sum_subset is None :`
	`72`	`+ print("Sum :",req_sum,"is not possible")`
	`73`	`+ else:`
	`74`	`+ print("Subset for sum",req_sum,' :')`
	`75`	`+ print(' '.join(str(x) for x in sum_subset))`
`61`	`76`
`62`	`77`	`"""`
`63`	`78`	`Input Explanation :`
`@@ -70,8 +85,7 @@ def find_subset(weight, req_sum):`
`70`	`85`
`71`	`86`	`Output :`
`72`	`87`	`Subset for sum 13 :`
`73`		`-8`
`74`		`-5`
	`88`	`+8 5`
`75`	`89`
`76`	`90`	`"""`
`77`	`91`

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`‎Scripts/Subset sum problem.py‎`

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