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You are given a sequence of n integers a1, a2, ..., an and an integer d.
Find the length of the shortest non-empty contiguous subsequence with sum of elements at least d. Formally, you should find the smallest positive integer k with the following property: there is an integer s (1 ≤ s ≤ N-k+1) such that as + as+1 + ... + as+k-1 ≥ d.
- The first line of the input contains a single integer T denoting the number of test cases. The description of T test cases follows.
- The first line of each test case contains two space-separated integers n and d.
- The second line contains n space-separated integers a1, a2, ..., an.
For each test case, print a single line containing one integer — the length of the shortest contiguous subsequence with sum of elements ≥ d. If there is no such subsequence, print -1 instead.
- 1 ≤ T ≤ 105
- 1 ≤ n ≤ 105
- -109 ≤ d ≤ 109
- -104 ≤ ai ≤ 104
- 1 ≤ sum of n over all test cases ≤ 2 · 105
Input: 2 5 5 1 2 3 1 -5 5 1 1 2 3 1 -5 Output: 2 1
|Tags||binary-search, chemthan, chemthan, cook89, easy-medium, likecs, prefix-sum|
|Time Limit:||1 sec|
|Source Limit:||50000 Bytes|
|Languages:||C, CPP14, JAVA, PYTH, PYTH 3.6, PYPY, CS2, PAS fpc, PAS gpc, RUBY, PHP, GO, NODEJS, HASK, SCALA, D, PERL, FORT, WSPC, ADA, CAML, ICK, BF, ASM, CLPS, PRLG, ICON, SCM qobi, PIKE, ST, NICE, LUA, BASH, NEM, LISP sbcl, LISP clisp, SCM guile, JS, ERL, TCL, PERL6, TEXT, SCM chicken, CLOJ, FS|
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