Compilare: user.cpp: In function ‘int main()’: user.cpp:12:18: warning: unused variable ‘sum’ [-Wunused-variable] int sol = 0, sum, p, q, j; ^ user.cpp:12:23: warning: unused variable ‘p’ [-Wunused-variable] int sol = 0, sum, p, q, j; ^ user.cpp:12:26: warning: unused variable ‘q’ [-Wunused-variable] int sol = 0, sum, p, q, j; ^ user.cpp:13:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ferma.in", "r", stdin); ^ user.cpp:14:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ferma.out", "w", stdout); ^ user.cpp:15:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &k); ^ user.cpp:17:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^