Eroare de compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import<fstream> ^~~~~~ main.cpp:2:38: error: size of array 'v' has non-integral type 'double' std::ifstream q{"perm2.in"};int v[1e5],n,i,m,o,p,s=1;main(){q>>n;while(i<n)q>>v[i++];for(i=0;i<n;++i)if(v[i]){p=i,m=0;while(v[p])++m,o=v[p],v[p]=0,p=o;s*=m/__gcd(s,m);}std::ofstream{"perm2.out"}<<s;} ^ main.cpp:2:59: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] std::ifstream q{"perm2.in"};int v[1e5],n,i,m,o,p,s=1;main(){q>>n;while(i<n)q>>v[i++];for(i=0;i<n;++i)if(v[i]){p=i,m=0;while(v[p])++m,o=v[p],v[p]=0,p=o;s*=m/__gcd(s,m);}std::ofstream{"perm2.out"}<<s;} ^ main.cpp: In function 'int main()': main.cpp:2:166: error: '__gcd' was not declared in this scope std::ifstream q{"perm2.in"};int v[1e5],n,i,m,o,p,s=1;main(){q>>n;while(i<n)q>>v[i++];for(i=0;i<n;++i)if(v[i]){p=i,m=0;while(v[p])++m,o=v[p],v[p]=0,p=o;s*=m/__gcd(s,m);}std::ofstream{"perm2.out"}<<s;} ^ Non zero exit status: 1