HDU 4331 Image Recognition
树状数组+扫描线 官方题解： 本题题目大意在一个01方阵中找出四条边全都是1的正方形的个数，对于正方形内部则没有要求。 一个直观的想法是首先用N^2的时间预处理出每一个是1的点向上下左右四个方向能够延伸的1的最大长度，记为四个数组l, r, u, d。然后我们观察到正方形有一个特征是同一对角线上的两个顶点在原方阵的同一条对角线上。于是我们可以想到枚举原来方阵的每条对角线，然后我们对于每条对角线枚举
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相关文章
- 1. Image/object recognition datasets
- 2. ResNet：Deep Residual for Image Recognition
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- 4. Research of the Image Recognition , Facial Recognition and YOLO algorithm.
- 5. ResNet--Deep Residual Learning for Image Recognition
- 6. [ResNet]Deep Residual Learning for Image Recognition
- 7. Deep Residual Learning for Image Recognition
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- 10. Learning Transferable Architectures for Scalable image recognition