class Solution {
public:
int singleNumber(int A[], int n) {
//异或
int elem = 0;
for(int i = 0; i < n ; i++) {
elem = elem ^ A[i];
}
return elem;
}
};
class Solution {
public:
int singleNumber(int A[], int n) {
//异或
int elem = 0;
for(int i = 0; i < n ; i++) {
elem = elem ^ A[i];
}
return elem;
}
};