24 lines
549 B
Swift
24 lines
549 B
Swift
func dfs(_ n:Int, _ m:Int, _ now:Int, _ result:inout [Int]) {
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if result.count == m {
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for n in result {
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print(n, terminator: " ")
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}
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print()
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return
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}
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for next in now...n {
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result.append(next)
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dfs(n,m,next,&result)
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_ = result.popLast()
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}
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}
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if let input = readLine(),
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let nums:[Int] = input.split(separator: " ").compactMap({Int($0)}) as? [Int],
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nums.count==2 {
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let N:Int = nums[0]
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let M:Int = nums[1]
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var result:[Int] = []
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dfs(N,M,1,&result)
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} |