Problem 1771. Polygonal numbers

Solution 2059020

Submitted on 16 Dec 2019

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Test	Status	Code Input and Output
1	Pass	assert(P(4,3)==9) y = 9
2	Pass	s=3; n=1:5; y_correct=[1 3 6 10 15]; assert(isequal(P(s,n),y_correct)) y = 1 3 6 10 15
3	Pass	s=3:6; n=4; Y_correct=[10 16 22 28]; assert(isequal(P(s,n),Y_correct)) y = 10 16 22 28
4	Pass	s=randi([3 1000],1,10); n=1; y_correct=ones(1,10); assert(isequal(P(s,n),y_correct)) y = 1 1 1 1 1 1 1 1 1 1
5	Pass	s=randi(1000,1,10)+2; n=5; y_correct=10*s-15; assert(isequal(P(s,n),y_correct)) y = 3365 3155 8725 1575 5365 8705 4175 7495 6045 7505
6	Fail	s=[5 6 7]'; n=[2 8 9]; y_correct=[5 92 117;6 120 153;7 148 189]; assert(isequal(P(s,n),y_correct)) y = 314 Assertion failed.
7	Fail	% for M.Z. s=[5 6 7]'; n=[2 8 9]; y_correct=[5 92 117;6 120 153;7 148 189]; assert(isequal(P(flipud(s),n),flipud(y_correct))) y = 244 Assertion failed.
8	Pass	s=randi([3,1000]); n=randi([3,1000]); assert(P(s+1,n+1)-P(s,n+1)==P(3,n)) y = 129182472 y = 129046491 y = 135981