delete pics to save space

2.11988.cpp

@@ -0,0 +1,34 @@
+#include<cstdio>
+#include<cstring>
+const int maxn=100000+5;
+int last,cur,next[maxn];
+char s[maxn];
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	while(scanf("%s",s+1)==1)
+	{
+		int n=strlen(s+1);
+		last=cur=0;
+		next[0]=0;
+		for(int i=1;i<=n;i++)
+		{
+			char ch=s[i];
+			if(ch=='[') cur=0;
+			else if(ch==']') cur=last;
+			else
+			{
+				next[i]=next[cur];
+				next[cur]=i;
+				if(cur==last) last=i;
+				cur=i;
+			}
+		}
+		for(int i=next[0];i!=0;i=next[i])
+			printf("%c",s[i]);
+		printf("\n");
+	}
+	return 0;
+}