Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import<bits/stdc++.h> ^~~~~~ main.cpp: In function 'int main()': main.cpp:2:182: warning: 'r' may be used uninitialized in this function [-Wmaybe-uninitialized] using namespace std;ifstream f("joc5.in");ofstream g("joc5.out");int main(){int i,x,r,j,n;f>>n;while(n){for(i=1;i<=n;++i)for(j=1;j<=n;++j){f>>x;if(j==1&&i==1)r=x;else if(j==i)r^=x;}if(r)g<<"1\n";else g<<"2\n";f>>n;}} ^~