Compilare: main.cpp: In function 'int main()': main.cpp:99:12: warning: unused variable 'q' [-Wunused-variable] 99 | int m, n, q, a, b; | ^ main.cpp:111:16: warning: iteration 19 invokes undefined behavior [-Waggressive-loop-optimizations] 111 | pow_cache[i] = 2 * pow_cache[i - 1]; | ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:110:17: note: within this loop 110 | for(int i=1; i < 21; ++i){ | ~~^~~~