Cody

# Problem 509. Count photos

Solution 1865890

Submitted on 5 Jul 2019
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### Test Suite

Test Status Code Input and Output
1   Fail
x = 10; y_correct = 45; assert(isequal(photos(x),y_correct))

Undefined function 'combnk' for input arguments of type 'double'. Error in photos (line 2) yy = combnk(1:x,2); Error in Test1 (line 3) assert(isequal(photos(x),y_correct))

2   Fail
x = 100; y_correct = 4950; assert(isequal(photos(x),y_correct))

Undefined function 'combnk' for input arguments of type 'double'. Error in photos (line 2) yy = combnk(1:x,2); Error in Test2 (line 3) assert(isequal(photos(x),y_correct))

3   Fail
x = 1000; y_correct = 499500; assert(isequal(photos(x),y_correct))

Undefined function 'combnk' for input arguments of type 'double'. Error in photos (line 2) yy = combnk(1:x,2); Error in Test3 (line 3) assert(isequal(photos(x),y_correct))

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