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Given four positive integers M, D, L, R, your task is to find the minimal non-negative integer x which satisfies L ≤ ( D × x mod M ) ≤ R, where mod is the remainder operation
The first line contains one number N -- the number of test cases.(1 ≤ N ≤ 100)
Each of the following N lines contains four integers M, D, L, R ( 1≤ M, D, L, R ≤ 2,000,000,000)
For each test case, print the minimal x. If there is no such x, print "-1" instead.
4 4 3 1 1 4 2 1 1 4 2 2 4 4 4 4 4
3 -1 1 -1
| 时间上限 | 内存上限 |
| 1000 | 131072 |