59. Spiral Matrix II
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Spiral Matrix II
对比上一题 此题的题意:
其实跟上一题一样 同样使用四个for循环 主要注意不要搞混变量 不然很烦
代码
public class Solution { public int[][] generateMatrix(int n) { int[][] ret = new int[n][n]; int top = 0,left = 0; int right = n - 1, down = n - 1; int count = 1; while(left <= right){ for(int i = left; i <= right; i++){//先从左到右 ret[top][i] = count++; } top++; for(int i = top; i <= down; i++){//再从上向下 ret[i][right] = count++; } right--; for(int i = right; i >= left; i--){//然后从左到右 ret[down][i] = count++; } down--; for(int i = down; i >= top; i--){//最后从下向上 ret[i][left] = count++; } left++; } return ret; }}
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- 59.Spiral Matrix II
- 59. Spiral Matrix II
- 59. Spiral Matrix II
- 59. Spiral Matrix II
- 59. Spiral Matrix II
- 59. Spiral Matrix II
- 59. Spiral Matrix II
- 59. Spiral Matrix II
- 59. Spiral Matrix II
- 59. Spiral Matrix II
- 59. Spiral Matrix II
- 59. Spiral Matrix II
- 59. Spiral Matrix II
- 59. Spiral Matrix II
- 59. Spiral Matrix II
- 59. Spiral Matrix II
- 59. Spiral Matrix II
- 59. Spiral Matrix II
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