LeetCode---Majority Element

class Solution {
public:
int majorityElement(vector<int>& nums) {
vector<int>::iterator pos;
map<int,int> intint;
for(pos=nums.begin();pos!=nums.end();++pos){
intint[*pos]++;
}
map<int,int>::iterator pos1;
for(pos1=intint.begin();pos1!=intint.end();++pos1){
if(pos1->second>(nums.size()/2)) return pos1->first;
}
return 0;
}
};