Given an array of integers and an integer k, find out whether there are two distinct indices i and j in the array such that nums[i] = nums[j] and the difference between i and jis at most k.
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class Solution {
public:
bool containsNearbyDuplicate(vector<int> &nums, int k) {
if(nums.size()==0) return false;
map<int, int> maps;
map<int, int>::iterator it;
for(int i=0; i<nums.size(); i++) {
it = maps.find(nums[i]);
if(it != maps.end()) {
int index = it->second;
if(i-index<=k) return true;
}
maps[nums[i]] = i;
}
return false;
}
};
本文介绍了一个算法问题:如何判断一个整数数组中是否存在两个不同的索引 i 和 j,使得 nums[i] = nums[j] 并且 i 和 j 的差的绝对值不超过 k。通过使用 C++ 中 map 数据结构的方法来解决此问题。
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