Eroare de compilare: main.cpp:2:42: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] int g[25][250001],n,m,p,q,i,j,k,e{};main(){std::ifstream o{"stramosi.in"};is>>n>>m;for(i=1;i<=n;++i)o>>g[0][i];for(k=1;(1<<k)<=n;++k)for(j=1;j<=n;++j)g[k][j]=g[k-1][g[k-1][j]];std::ofstream s{"stramosi.out"};for(i=1;i<=m;++i){o>>q>>p;while(p){if(p&1)q=g[e][q];++e;p>>=1;}s<<q<<'\n';}} ^ main.cpp: In function 'int main()': main.cpp:2:75: error: 'is' was not declared in this scope int g[25][250001],n,m,p,q,i,j,k,e{};main(){std::ifstream o{"stramosi.in"};is>>n>>m;for(i=1;i<=n;++i)o>>g[0][i];for(k=1;(1<<k)<=n;++k)for(j=1;j<=n;++j)g[k][j]=g[k-1][g[k-1][j]];std::ofstream s{"stramosi.out"};for(i=1;i<=m;++i){o>>q>>p;while(p){if(p&1)q=g[e][q];++e;p>>=1;}s<<q<<'\n';}} ^~ Non zero exit status: 1