SP7630 SHOPPERS - SHOPPERS

``` A group of N shoppers go to a supermarket. The supermarket has M items. Each shopper wants to buy only the items he likes.They plan to buy K items in all. A shopper can buy at max only one item. Some shoppers may not buy anything and some items might not be bought. Input First line contains the number of test cases. Each test case contains three integers N , M and K separated by spaces. Then follow N lines containing M characters each.If jth character of ith line is 1 then ith shopper likes item j. 1

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