class Solution {
public:
bool Find(int target, vector<vector<int> > array) {
int i = 0;
int j = array[0].size()-1;
while(i<array.size() && j>=0){
if(target > array[i][j]){
i++;
} else if (target < array[i][j]){
j--;
} else{
return true;
}
}
return false;
}
};
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