Backtracking Code with Advanced Recursion
#include <bits/stdc++.h> using namespace std; #define nl "\n" #define int long long int #define FAST ios::sync_with_stdio(false); cin.tie(0); cout.tie(0); bool cmp(const pair<char, int>& a, const pair<char, int>& b) { if (a.second != b.second) { return a.second > b.second; } return a.first < b.first; } vector <string> valid; void generate(string &s,int open, int close) { if(open==0 and close==0) { valid.push_back(s); return; } if(open>0) { s.push_back('('); generate(s,open-1,close); s.pop_back(); } if(close>0) { if(open<close) { ...