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K. Topological Sort
time limit per test
8.0 s
memory limit per test
256 MB
input
standard input
output
standard output
Consider a directed graph G of N nodes and all edges (u→v) such that u < v. It is clear that this graph doesn’t contain any cycles.
Your task is to find the lexicographically largest topological sort of the graph after removing a given list of edges.
A topological sort of a directed graph is a sequence that contains all nodes from 1 to N in some order such that each node appears in the sequence before all nodes reachable from it.
Input
The first line of input contains a single integer T, the number of test cases.
The first line of each test case contains two integers N and M (1 ≤ N ≤ 105)
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