Compilare: main.cpp: In function 'int ciu()': main.cpp:14:18: warning: iteration 499999 invokes undefined behavior [-Waggressive-loop-optimizations] 14 | if(ciur[i] == 0) { | ~~~~~~^ main.cpp:13:22: note: within this loop 13 | for(int i = 2; i <= 500001; i++) { | ~~^~~~~~~~~ main.cpp:22:18: warning: iteration 499999 invokes undefined behavior [-Waggressive-loop-optimizations] 22 | if(ciur[i] == 0) { | ~~~~~~^ main.cpp:21:22: note: within this loop 21 | for(int i = 2; i <= 500001; i++) { | ~~^~~~~~~~~