题解
public void FindNumsAppearOnce(int [] array,int num1[] , int num2[]) {
int diff = 0;
for(int num:array) diff ^= num;
diff &= -diff;
for(int num:array){
if((num&diff)==0) num1[0] ^= num;
else num2[0] ^= num;
}
} 
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