Compilare: main.cpp: In function 'int main()': main.cpp:30:9: warning: unused variable 'm' [-Wunused-variable] 30 | int m,t,i,j; | ^ main.cpp: In function 'void sieve()': main.cpp:14:15: warning: iteration 50001 invokes undefined behavior [-Waggressive-loop-optimizations] 14 | phi[i]=i; | ~~~~~~^~ main.cpp:13:16: note: within this loop 13 | for (i=1; i<=dim; i++) | ^ main.cpp:17:18: warning: iteration 50000 invokes undefined behavior [-Waggressive-loop-optimizations] 17 | if (phi[i]==i) | ~~~~~^ main.cpp:16:16: note: within this loop 16 | for (i=2; i<=dim; i++) | ^ main.cpp:24:15: warning: iteration 50000 invokes undefined behavior [-Waggressive-loop-optimizations] 24 | phi[i]+=phi[i-1]; | ~~~~~~^~~~~~~~~~ main.cpp:23:16: note: within this loop 23 | for (i=2; i<=dim; i++) | ^