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