diff options
Diffstat (limited to 'other/make_array_increasing.cpp')
-rw-r--r-- | other/make_array_increasing.cpp | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/other/make_array_increasing.cpp b/other/make_array_increasing.cpp new file mode 100644 index 0000000..482c0da --- /dev/null +++ b/other/make_array_increasing.cpp @@ -0,0 +1,59 @@ +// 1187. Make Array Strictly Increasing +#include <algorithm> +#include <limits.h> +#include <stdio.h> +#include <unordered_map> +#include <vector> +using namespace std; + +/* + * given two integer arrays 'arr1' and 'arr2', return the minimum number of + * operations (possibly zero) needed to make 'arr1' strictly Increasing in one + * opration, you can choose two indices '0 <= i <= arr1.len' and '0 <= j < + * arr2.len' and do the assignment 'arr1[i] = arr2[j]' if there is no way to + * make 'arr1' strictly increasing, return -1 + */ + +class Solution { + int check(int curr, int left, vector<int> &arr1, vector<int> &arr2, + vector<unordered_map<int, int>> &dp) { + if (curr == arr1.size()) + return 0; + if (dp[curr].find(left) != dp[curr].end()) + return dp[curr][left]; + int exclude, include; + if (arr1[curr] > left) + exclude = check(curr + 1, arr1[curr], arr1, arr2, dp); + else + exclude = INT_MAX; + int rep = upper_bound(arr2.begin(), arr2.end(), left) - arr2.begin(); + if (rep == arr2.size()) + include = INT_MAX; + else + include = check(curr + 1, arr2[rep], arr1, arr2, dp); + if (include == INT_MAX) + dp[curr][left] = exclude; + else + dp[curr][left] = min(exclude, include + 1); + return dp[curr][left]; + } + +public: + int makeArrayIncreasing(vector<int> &arr1, vector<int> &arr2) { + sort(arr2.begin(), arr2.end()); + vector<unordered_map<int, int>> dp(2001); + int val = check(0, INT_MIN, arr1, arr2, dp); + if (val == INT_MAX) + return -1; + return val; + } +}; + +int main() { + Solution obj; + vector<int> a1123 = {1, 5, 3, 6, 7}; + vector<int> a21 = {1, 3, 2, 4}, a22 = {4, 3, 1}, a23 = {1, 6, 3, 3}; + printf("%d\n", obj.makeArrayIncreasing(a1123, a21)); // expect: 1 + printf("%d\n", obj.makeArrayIncreasing(a1123, a22)); // expect: 1 + printf("%d\n", obj.makeArrayIncreasing(a1123, a23)); // expect: 1 +} |