LeetCode刷题(C++)——Edit Distance(Hard)
Given two words word1 and word2, find the minimum number of steps required to convert word1 to word2. (each operation is counted as 1 step.)
You have the following 3 operations permitted on a word:
a) Insert a character
b) Delete a character
c) Replace a character
class Solution {
public:
int minDistance(string word1, string word2) {
int m = word1.length(), n = word2.length();
vector<vector<int>> dp(m + 1, vector<int>(n + 1));
for (int i = 0; i <= m;++i) {
for (int j = 0; j <= n;++j) {
if (i == 0) {
dp[i][j] = j;
}
else if (j == 0) {
dp[i][j] = i;
}
else {
dp[i][j] = min(dp[i - 1][j - 1] + ((word1[i - 1] == word2[j - 1]) ? 0 : 1),
min(dp[i][j - 1] + 1, dp[i - 1][j] + 1)
);
}
}
}
return dp[m][n];
}
};
还没有评论,来说两句吧...