Compilare: main.cpp: In function 'void build_RMQ(int)': main.cpp:45:15: warning: unused variable 'x' [-Wunused-variable] int i, j, x; ^ main.cpp: In function 'int main()': main.cpp:67:21: warning: unused variable 'j' [-Wunused-variable] int n, m, p, i, j, x, y, node, val, a, b, c, d, length, st, dr, answer; ^ main.cpp:67:53: warning: unused variable 'length' [-Wunused-variable] int n, m, p, i, j, x, y, node, val, a, b, c, d, length, st, dr, answer; ^~~~~~