sum of triangular numbers

Правка en1, от Minimalistic, 2018-06-29 05:16:08

you have an an integer n such that 1<=n<= 10^12, find the sum of all triagular numbers that are less than or equal n,

time limit: 1 second

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en1 Английский Minimalistic 2018-06-29 05:16:08 167 Initial revision (published)