Compilare: main.cpp: In function 'int main()': main.cpp:2:107: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 2 | using namespace std;int i,t,p,j;string s,w,r;vector<string>c{{}},k;int main(){ifstream("arh.in")>>s;for(;i<s.size();i++)if(isdigit(s[i])){w={};while(isdigit(s[i]))w+=s[i++];i--,k.push_back(w);}else if(strchr("([",s[i]))c.push_back({}),t++;else if(s[i]==41){p=stoi(k.back()),k.pop_back(),r={};while(p--)r+=c.back();c.pop_back(),c.back()+=r;}else if(s[i]==93){string n=c.back(),r(n.rbegin(),n.rend());if(s[i-1]==42)n.pop_back();c.pop_back(),c.back()+=n+r;}else if(s[i]!=42)c.back()+=s[i];ofstream("arh.out")<<t<<'\n'<<c.back();} | ~^~~~~~~~~