2.1.23—线性表—Single Number
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描述
Given an array of integers, every element appears twice except for one. Find that single one.
Note: Your algorithm should have a linear runtime complexity. Could you implement it without using
Given an array of integers, every element appears twice except for one. Find that single one.
Note: Your algorithm should have a linear runtime complexity. Could you implement it without using
extra memory?
#include<iostream>using namespace std;int main(){const int n = 11;int a[n] = { 1, 3, 5, 7, 9, 7, 5, 3, 9, 1, 4 };int res = 0;for (int i = 0; i < n; i++)res = res^a[i];cout << res << endl;}
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