[leetcode]jump game

class Solution {

public:

    bool canJump(int A[], int n) {

        // Start typing your C/C++ solution below

        // DO NOT write int main() function

        if(n == 0) return false;

        if(n == 1) return true;

        

        int range = A[0];

        for(int i = 1; i < n; i++){

            if(range >= n-1) return true;

            if(i <= range){

                range = max(range, A[i] + i);

            }

        }

        return false;

        

    }

};