delete pics to save space

2.1626.cpp

@@ -0,0 +1,71 @@
+#include<cstdio>
+#include<cstring>
+#include<algorithm>
+using namespace std;
+const int maxn=100+5;
+char S[maxn];
+int n,d[maxn][maxn];
+inline bool match(const char& a,const char& b)
+{
+	return (a=='('&&b==')')||(a=='['&&b==']');
+}
+void dp()
+{
+	for(int i = 0; i < n; i++)
+	{
+		d[i+1][i] = 0;
+		d[i][i] = 1;
+	}
+	for(int i = n-2; i >= 0; i--)
+		for(int j = i+1; j < n; j++)
+		{
+			d[i][j] = n;
+			if(match(S[i], S[j])) d[i][j] = min(d[i][j], d[i+1][j-1]);
+			for(int k = i; k < j; k++)
+				d[i][j] = min(d[i][j], d[i][k] + d[k+1][j]);
+		}
+}
+
+void print(int i, int j)
+{
+	if(i > j) return;
+	if(i == j)
+	{
+		if(S[i] == '(' || S[i] == ')') printf("()");
+		else printf("[]");
+		return;
+	}
+	int ans = d[i][j];
+	if(match(S[i], S[j]) && ans == d[i+1][j-1])
+	{
+		printf("%c", S[i]); print(i+1, j-1);
+		printf("%c", S[j]);
+		return;
+	}
+	for(int k = i; k < j; k++)
+		if(ans == d[i][k] + d[k+1][j])
+		{
+			print(i,k);
+			print(k+1,j);
+			return;
+		}
+}
+int main()
+{
+	int T;
+	fgets(S,maxn,stdin);
+	sscanf(S,"%d",&T);
+	fgets(S,maxn,stdin);
+	while(T--)
+	{
+		fgets(S,maxn,stdin);
+		n=strlen(S)-1;
+		memset(d, -1, sizeof(d));
+		dp();
+		print(0, n-1);
+		printf("\n");
+		if(T) printf("\n");
+		fgets(S,maxn,stdin);
+	}
+	return 0;
+}