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https://leetcode.com/problems/max-chunks-to-make-sorted/
class Solution {
public:
int maxChunksToSorted(vector<int>& arr) {
int res = 0, len = arr.size(), mx = 0;
for(int i=0; i<len; i++){
mx = max(mx, arr[i]);
if(mx==i) res+=1;
}
return res;
}
};
