题解 | 找出缺失的整数

class Finder {
public:
    int findMissing(vector<vector<int> > numbers, int n) {
        // write code here
        int flag = 1;
        int idx=0;
        for( ;idx< numbers.size();idx++){
            if(  flag == numbers[idx][0] ) return idx;
            flag = numbers[idx][0];
        }
        return idx;
    }
};