Compilare: main.cpp: In member function 'void DSU::clear()': main.cpp:46:22: warning: iteration 91808 invokes undefined behavior [-Waggressive-loop-optimizations] 46 | t[i] = i, used[i] = 0; | ~~~~~~~~^~~ main.cpp:45:20: note: within this loop 45 | for(int i = 1; i <= NMAX * NMAX; i++) | ~~^~~~~~~~~~~~~~ main.cpp: In function 'void __static_initialization_and_destruction_0(int, int)': main.cpp:24:9: warning: iteration 91808 invokes undefined behavior [-Waggressive-loop-optimizations] 24 | t[i] = i; | ~~~~~^~~ main.cpp:23:20: note: within this loop 23 | for(int i = 1; i <= NMAX * NMAX; i++) | ~~^~~~~~~~~~~~~~ In member function 'void DSU::clear()', inlined from 'int main()' at main.cpp:94:11: main.cpp:46:22: warning: 'void* __builtin_memset(void*, int, long unsigned int)' forming offset 91809 is out of the bounds [0, 91809] of object 'used' with type 'bool [91809]' [-Warray-bounds] 46 | t[i] = i, used[i] = 0; | ~~~~~~~~^~~ main.cpp: In function 'int main()': main.cpp:10:6: note: 'used' declared here 10 | bool used[NMAX * NMAX], answered[QMAX]; | ^~~~