Compilare: user.cpp: In function ‘void read()’: user.cpp:10:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rsir.in", "r", stdin); ^ user.cpp:11:82: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d %d %d %d %d %lld", &t0, &t1, &a, &b, &x, &y, &z, &mod, &n); ^ user.cpp: In function ‘void write()’: user.cpp:107:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rsir.out", "w", stdout); ^ user.cpp: In function ‘void solve()’: user.cpp:88:5: warning: ‘pos’ is used uninitialized in this function [-Wuninitialized] if (pos > k) ^