Compilare: user.cpp: In function ‘int main()’: user.cpp:58:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("sortare.in", "r", stdin); ^ user.cpp:59:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("sortare.out", "w", stdout); ^ user.cpp:61:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &N), pos[1] = 1; ^ user.cpp:63:56: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d %d", &A[i], &B[i], &C[i]), pos[i] = 1; ^ user.cpp: In function ‘void solve(int, int)’: user.cpp:35:24: warning: ‘pc’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (pa == pb || pb == pc) ^ user.cpp:35:24: warning: ‘pb’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:35:12: warning: ‘pa’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (pa == pb || pb == pc) ^