#include<stdio.h> #include<string.h> int main() { char str1[1001] = {0}; char str2[1001] = {0}; scanf("%s\n%s", &str1, &str2); int len1 = strlen(str1); int len2 = strlen(str2); int dp[1000][1000] = {0}; for (int i = 0; i <= len1; i++) dp[0][i] = i; for (int i = 0; i <= len2; i++) dp[i][0] = i; int min = 0; for (int i = 1; i <= len2; i++) for (int j = 1; j <= len1; j++) { if (str1[j - 1] == str2[i - 1]) dp[i][j] = dp[i - 1][j - 1]; else { min = dp[i - 1][j - 1] + 1; if (min > (dp[i][j - 1] + 1)) min = (dp[i][j - 1] + 1); if (min > (dp[i - 1][j] + 1)) min = (dp[i - 1][j] + 1); dp[i][j] = min; } } printf("%d", dp[len2][len1]); return 0; }