Compilare: main.cpp: In function 'int main()': main.cpp:11:18: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 11 | for(int i=2;i<=N;i++){ | ~^~~ main.cpp:16:28: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 16 | for(int j=i*i;j<=N;j+=i){ | ~^~~ main.cpp:21:18: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 21 | for(int i=0;i<=N;++i){ | ~^~~ main.cpp:7:20: warning: unused variable 'x' [-Wunused-variable] 7 | unsigned int N,x,contor=0; | ^