Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] 1 | #import<fstream> | ^~~~~~ main.cpp:2:61: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] 2 | int g[25][1<<18],n,m,i,j,k=1;std::ifstream o{"stramosi.in"};main(){for(o>>n>>m;i<n;o>>g[0][++i]);for(;1<<k<=n;++k)for(j=1;j<=n;)g[k][j++]=g[k-1][g[k-1][j]];for(std::ofstream s{"stramosi.out"};m--;s<<i<<'\n')for(k=0,o>>i>>j;j;++k,j>>=1)j&1?i=g[k][i]:i;} | ^~~~ main.cpp: In function 'int main()': main.cpp:2:135: warning: operation on 'j' may be undefined [-Wsequence-point] 2 | int g[25][1<<18],n,m,i,j,k=1;std::ifstream o{"stramosi.in"};main(){for(o>>n>>m;i<n;o>>g[0][++i]);for(;1<<k<=n;++k)for(j=1;j<=n;)g[k][j++]=g[k-1][g[k-1][j]];for(std::ofstream s{"stramosi.out"};m--;s<<i<<'\n')for(k=0,o>>i>>j;j;++k,j>>=1)j&1?i=g[k][i]:i;} | ~^~