Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:9:23: error: ‘N’ was not declared in this scope for (int i = 1; i <= N; i++) phi[i] = i; ^ user.cpp:11:23: error: ‘N’ was not declared in this scope for (int i = 2; i <= N; i++) ^ user.cpp:12:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (phi[i] == i) ^ user.cpp:13:7: error: ‘j’ was not declared in this scope for (j = i; j <= N; j += i) phi[j] *= (i-1)/i ^ user.cpp:15:2: error: expected ‘;’ before ‘for’ for (i = 2; i <= n; i++)x+=phi[i]*2; ^ user.cpp:15:16: warning: statement has no effect [-Wunused-value] for (i = 2; i <= n; i++)x+=phi[i]*2; ^ user.cpp:15:25: error: expected ‘;’ before ‘)’ token for (i = 2; i <= n; i++)x+=phi[i]*2; ^