Task: Find the first non repeating character in a stream, The steam is inserted one character at a time from given string. Print first non repeating character in every inserting time if no such character exist print -1. Example: Input: 1 3 a a c Output: a -1 c Here is the Code: Program in C++: #include<iostream> #include<bits/stdc++.h> using namespace std; map<char,int> m; queue<char> q; void fnrcInStream(char *a,int n) { for(int i=0;i<n;i++) { if(m.find(a[i])==m.end()) { q.push(a[i]); } m[a[i]]++; if(m[q.front()]==1) { cout<<q.front()<<" "; } else { while(!q.empty()) { q.pop(); if(m[q.front()]==1) { cout<<q.front()<<" "; break; } } if(q.empty()) {