Compilare: user.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import<bits/stdc++.h> ^ user.cpp:2:96: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] std::ifstream f("litere.in");std::ofstream g("litere.out");int n,v[124],i,j;std::string s;main(){f>>n>>s;for(i=0;i<n;++i){v[s[i]]++;for(j=122;j>s[i];j--)v[0]+=v[j];}g<<v[0];} ^ user.cpp: In function ‘int main()’: user.cpp:2:129: warning: array subscript has type ‘char’ [-Wchar-subscripts] std::ifstream f("litere.in");std::ofstream g("litere.out");int n,v[124],i,j;std::string s;main(){f>>n>>s;for(i=0;i<n;++i){v[s[i]]++;for(j=122;j>s[i];j--)v[0]+=v[j];}g<<v[0];} ^