xylophone.cpp: In function 'void solve(long long int)':
xylophone.cpp:10:17: error: 'query' was not declared in this scope
A[2] = A[1]+query(1,2);
^~~~~
xylophone.cpp:44:9: error: 'answer' was not declared in this scope
answer(i,A[i]);
^~~~~~
xylophone.cpp:44:9: note: suggested alternative: 'assert'
answer(i,A[i]);
^~~~~~
assert
xylophone.cpp:7:10: warning: unused variable 'j' [-Wunused-variable]
ll i,j,k,mn = 1000000000;
^
xylophone.cpp:7:12: warning: unused variable 'k' [-Wunused-variable]
ll i,j,k,mn = 1000000000;
^