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README.md

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雙指針

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双指针算法

for(int i = 0, j = 0; i < n; i++) {
	while(j < i && check(j, i)) j++;
	
	// 每道題目的具體邏輯
}

j                    i
|--------------------|

常见问题分类: (1) 对于一个序列,用两个指针维护一段区间 (2) 对于两个序列,维护某种次序,比如归并排序中合并两个有序序列的操作

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