Compilare: user.cpp: In function ‘int main()’: user.cpp:46:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("teams.in", "r", stdin); ^ user.cpp:47:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("teams.out", "w", stdout); ^ user.cpp:49:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d%d", &N, &range1, &range2); ^ user.cpp:52:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &i); ^ user.cpp:57:118: warning: ‘rez’ may be used uninitialized in this function [-Wmaybe-uninitialized] L1 = interval1(i + 1 , N - 1 , range2 - x[i]), L2 = interval2(i + 1, N - 1, range1 - x[i] ), toth += L1 - L2 + 1; ^ user.cpp:57:118: warning: ‘rez’ may be used uninitialized in this function [-Wmaybe-uninitialized]