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| #include <cstdio>
#include <bits/stdc++.h>
#define rep(i,a,n) for(int i=a;i<n;++i)
#define per(i,a,n) for(int i=n-1;i>=a;--i)
#define clint(x,a) memset(x,a,sizeof(int)*n)
#define clll(x,a) memset(x,a,sizeof(ll)*n)
#define pb push_back
#define np next_permutation
#define mp make_pair
#define fi first
#define se second
#define INF 0x3f3f3f3f
#define EPS 1e-8
#define PI acos(-1.0)
using namespace std;
const int maxn=1e5+5;
const int maxm=1e5+5;
const int maxl=26;
char ss[maxn];
int nextt[maxn];
int main(){
ios::sync_with_stdio(false);
while(cin>>ss+1){
int last=0,cur=0;
memset(nextt,0,sizeof(nextt));
int len=strlen(ss+1);
rep(i,1,len+1){
if(ss[i]=='['){
cur=0;
}
else if(ss[i]==']') {
cur=last;
}
else {
nextt[i]=nextt[cur];
nextt[cur]=i;
if(cur==last) last=i;
cur=i;
}
}
for(int i=nextt[0];i!=0;i=nextt[i]){
cout<<ss[i];
}
cout<<endl;
}
}
|