class Solution {
public:
int jump(vector<int>& nums) {
int n=nums.size();
int cr=0, cmx=0, j=0;
for(int i=0;i<n-1;i++)
{
if(i+nums[i]>cmx) cmx=i+nums[i];
if(i==cr)
{
j++;
cr=cmx;
}
}
return j;
}
};
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