#include<bits/stdc++.h> #define ff first #define ss second using namespace std; string s; int i,n,x; pair<int,int> solve(){ if(s[x]=='?') return {1,n}; x++; char c=s[x]; pair<int,int> a,b; x+=3; a=solve(); x+=2; b=solve(); x++; if(c=='i'){ return {min(a.ff,b.ff),a.ss+b.ss-n-1}; } return {a.ff+b.ff,max(a.ss,b.ss)}; } int main(){ cin >> s; for(i=0;i<s.size();i++){ if(s[i]=='?') n++; } pair<int,int> ans=solve(); cout << ans.ss-ans.ff+1; }

Main.cpp: In function 'int main()':
Main.cpp:24:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |  for(i=0;i<s.size();i++){
      |          ~^~~~~~~~~