Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] 1 | #import<fstream> | ^~~~~~ main.cpp:3:91: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] 3 | int a=100001,b=100,n,i,j,k;std::ifstream f("royfloyd.in");std::ofstream o("royfloyd.out");main(){int c[b][b];f>>n;c(i)c(j){f>>c[i][j];if(i!=j&!c[i][j])c[i][j]=a;}c(k)c(i)c(j)c[i][j]=std::min(c[i][j],c[i][k]+c[k][j]);c(i){c(j)o<<(c[i][j]==a?0:c[i][j])<<" ";o<<'\n';}} | ^~~~ main.cpp: In function 'int main()': main.cpp:3:139: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] 3 | int a=100001,b=100,n,i,j,k;std::ifstream f("royfloyd.in");std::ofstream o("royfloyd.out");main(){int c[b][b];f>>n;c(i)c(j){f>>c[i][j];if(i!=j&!c[i][j])c[i][j]=a;}c(k)c(i)c(j)c[i][j]=std::min(c[i][j],c[i][k]+c[k][j]);c(i){c(j)o<<(c[i][j]==a?0:c[i][j])<<" ";o<<'\n';}} | ~^~~