文章作者：Tyan
博客：noahsnail.com | CSDN | 简书
1. Description
Largest Number At Least Twice of Others
2. Solution
- Version 1
class Solution {
public:
int dominantIndex(vector<int>& nums) {
int index = 0;
for(int i = 1; i < nums.size(); i++) {
if(nums[i] > nums[index]) {
index = i;
}
}
for(int i = 0; i < nums.size(); i++) {
if(index != i && nums[i] * 2 > nums[index]) {
return -1;
}
}
return index;
}
};
- Version 2
class Solution {
public:
int dominantIndex(vector<int>& nums) {
if(nums.size() == 1) {
return 0;
}
int index = 0;
int second = 1;
for(int i = 1; i < nums.size(); i++) {
if(nums[i] > nums[index]) {
second = index;
index = i;
}
else if(nums[i] > nums[second]) {
second = i;
}
}
if(nums[second] * 2 > nums[index]) {
return -1;
}
return index;
}
};
