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#include <iostream> #include <vector> #include <cstring> using namespace std; string s1, s2; int dp[5005][5005]; int rec(int i, int j) { if(i == -1) { return j + 1; } if(j == -1) { return i + 1; } if(dp[i][j] != -1) { return dp[i][j]; } int result = 2e9; if(s1[i] == s2[j]) { result = min(result, rec(i - 1, j - 1)); } result = min(result, rec(i - 1, j) + 1); result = min(result, rec(i, j - 1) + 1); result = min(result, rec(i - 1, j - 1) + 1); return dp[i][j] = result; } int main() { cin >> s1 >> s2; memset(dp, -1, sizeof dp); cout << rec(s1.size() - 1, s2.size() - 1) << endl; return 0; }
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