算法笔记 --- 最短子数组

#include <iostream>
#include <vector>
using namespace std;

class Subsequence {
public:
    int shortestSubsequence(vector<int> A, int n) {
        int var_max = A[0];
        int var_min = A[n-1];
        int index1 = 0, index2 = 0;
        for(int i = 1; i < n; i++){
            if(A[i] >= var_max){
                var_max = A[i];
            }else{
                index1 = i;
            }
        }
        for(int i = n-2; i >=0; i--){
            if(A[i] <= var_min){
                var_min = A[i];
            }else{
                index2 = i;
            }
        }
        if(index1 == 0 && index2 == 0){
            return 0;
        }
        return (index1-index2+1);
    }
};
int main()
{

    vector<int> A;
    //1,4,6,5,9,10
    A.push_back(1), A.push_back(4), A.push_back(6), A.push_back(5), A.push_back(9), A.push_back(10);
    Subsequence sorter;
    int res = sorter.shortestSubsequence(A, 6);

    cout<<res<<endl;
    
    return 0;
}