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history_source/信息学奥赛一本通/2.9.3.2.cpp

@@ -0,0 +1,32 @@
+#include<cstdio>
+#include<string.h>
+char a[1010],b[1010];
+int dp[1010][1010];
+#define min(a,b) ((a)<(b)?(a):(b))
+#define max(a,b) ((a)>(b)?(a):(b))
+int answer()
+{
+	int len_a=strlen(a),len_b=strlen(b);
+	for(int i=1;i<=len_a;i++) dp[i][0]=i;
+	for(int i=1;i<=len_b;i++) dp[0][i]=i;
+	for(int i=1;i<=len_a;i++)
+		for(int j=1;j<=len_b;j++)
+			if(a[i-1]==b[j-1]) dp[i][j]=dp[i-1][j-1];
+			else 
+				dp[i][j]=
+				min(min(dp[i-1][j-1],dp[i-1][j]),dp[i][j-1])+1;
+	return dp[len_a][len_b];
+}
+int main()
+{
+	int n;
+	scanf("%d",&n);
+	int ans[n];
+	for(int i=0;i<n;i++)
+	{
+		scanf("%s%s",a,b);
+		ans[i]=answer();
+	}
+	for(int i=0;i<n;i++) printf("%d\n",ans[i]);
+	return 0;
+}