Compilare: main.cpp: In function 'int main()': main.cpp:29:9: warning: unused variable 'm' [-Wunused-variable] int m,t,i,j; ^ main.cpp: In function 'void sieve()': main.cpp:23:24: warning: iteration 50000 invokes undefined behavior [-Waggressive-loop-optimizations] phi[i]+=phi[i-1]; ^ main.cpp:22:16: note: within this loop for (i=2; i<=dim; i++) ^ main.cpp:16:18: warning: iteration 50000 invokes undefined behavior [-Waggressive-loop-optimizations] if (phi[i]==i) ~~~~~^ main.cpp:15:16: note: within this loop for (i=2; i<=dim; i++) ^ main.cpp:13:15: warning: iteration 50001 invokes undefined behavior [-Waggressive-loop-optimizations] phi[i]=i; ~~~~~~^~ main.cpp:12:16: note: within this loop for (i=1; i<=dim; i++) ^