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#include<stdio.h>
#include<iostream>
#include<stack>
#include<string>
#include<algorithm>
using namespace std;
int main(){
string s;
while(cin>>s){
int len = s.length();
char * c = new char[len+1];
c[len] = '\0';
stack<char> St;
for(int i=0; i<len; i++){
if(isalpha(s[i])) c[i]=' ';
else if(s[i]=='('){
St.push(s[i]);
c[i] = ' ';
}else i...
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