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package cap3
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func Work4(n int) [][]int {
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matrix := make([][]int, n)
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// 逐行长度递减的上三角矩阵
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for i := range matrix {
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matrix[i] = make([]int, n-i)
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}
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// 沿右上方向斜向上填充
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num := 1
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for i := 0; i < n; i++ {
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for j := 0; j <= i; j++ {
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matrix[i-j][j] = num
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num++
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}
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}
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return matrix
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}
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