View Compilation Error

0_0_18224531_610.cpp: In function 'int main()':
0_0_18224531_610.cpp:4:5: error: 'LL' was not declared in this scope
     LL n,m;
     ^
0_0_18224531_610.cpp:5:29: error: 'n' was not declared in this scope
     while(scanf("%lld%lld",&n,&m) != EOF ) puts(((n/2)*(n-(n/2)) <= m ? "T" : "F");
                             ^
0_0_18224531_610.cpp:5:32: error: 'm' was not declared in this scope
     while(scanf("%lld%lld",&n,&m) != EOF ) puts(((n/2)*(n-(n/2)) <= m ? "T" : "F");
                                ^