Compilare: main.cpp: In function 'void Construct()': main.cpp:25:57: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] if (input[sparse[i][j-1]] < input[sparse[i+(1 << j-1)][j-1]]) ~^~ main.cpp:28:40: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] sparse[i][j] = sparse[i+(1 << j-1)][j-1]; ~^~ main.cpp: In function 'int Query(int, int)': main.cpp:36:15: warning: 'k' is used uninitialized in this function [-Wuninitialized] int k = log2(k); ~~~~^~~