Compilare: main.cpp: In function 'int main()': main.cpp:18:28: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 18 | for(int j=2*i;j<n;j+=i) | ~^~ main.cpp:15:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] 15 | for(i=2;i<n;++i) | ^~~ main.cpp:22:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for' 22 | fout<<s; | ^~~~