Given scores of N athletes, find their relative ranks and the people with the top three highest scores, who will be awarded medals: "Gold Medal", "Silver Medal" and "Bronze Medal".

pair的用法和优先队列的使用

class Solution {
public:
    vector<string> findRelativeRanks(vector<int>& nums) {
        priority_queue<pair<int,int> > pq;
        for(int i=0;i<nums.size();i++)
        {
            pq.push(make_pair(nums[i],i));
        }
        vector<string> res(nums.size(),"");
        int count = 1;
        for(int i=0; i<nums.size();i++)
        {
            if(count==1) {res[pq.top().second] = "Gold Medal"; count++;}
            else if(count==2) {res[pq.top().second] = "Silver Medal"; count++;}
            else if(count==3) {res[pq.top().second] = "Bronze Medal"; count++;}
            else {res[pq.top().second] = to_string(count); count++;}
            pq.pop();
        }
        return res;
    }
};