题解 | 数组中出现次数超过一半的数字
数组中出现次数超过一半的数字
https://www.nowcoder.com/practice/e8a1b01a2df14cb2b228b30ee6a92163
class Solution {
public:
/**
* 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
*
*
* @param numbers int整型vector
* @return int整型
*/
int MoreThanHalfNum_Solution(vector<int>& numbers) {
//target超过一半《==》others之和少于一半
//移项得等价条件no of target-no of others>0
//==》selected +1,others-1,从开头遍历换selected，最后留下来的selected就是target
if(numbers.empty())return 0;
int selected = numbers[0];
int count=1;
for(size_t i=1;i<numbers.size();i++)
{
if(count==0)
{
selected=numbers[i];
count=1;
}else if(numbers[i]==selected)
{
count++;
}else {
count--;
}
}
return selected;
}
};
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