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int a1=3,a2=5,an=2*a2+a1,n=1;
for(;an>1000000;n++){
  a1=a2; a2=an; an=2*a2+a1;
} printf("%d",n);

Main.java:1: error: class, interface, or enum expected
int a1=3,a2=5,an=2*a2+a1,n=1;
^
Main.java:1: error: class, interface, or enum expected
int a1=3,a2=5,an=2*a2+a1,n=1;
    ^
Main.java:2: error: class, interface, or enum expected
for(;an>1000000;n++){
^
Main.java:2: error: class, interface, or enum expected
for(;an>1000000;n++){
     ^
Main.java:2: error: class, interface, or enum expected
for(;an>1000000;n++){
                ^
Main.java:3: error: class, interface, or enum expected
  a1=a2; a2=an; an=2*a2+a1;
         ^
Main.java:3: error: class, interface, or enum expected
  a1=a2; a2=an; an=2*a2+a1;
                ^
Main.java:4: error: class, interface, or enum expected
} printf("%d",n);
^
8 errors

Standard output is empty