Compilare: user.cpp: In function ‘void prec()’: user.cpp:32:59: warning: unused variable ‘F1’ [-Wunused-variable] int f2 = t1, s2 = t1, f1 = t0, s1 = t0, i = 1, j = 1, F1, F2; ^ user.cpp:32:63: warning: unused variable ‘F2’ [-Wunused-variable] int f2 = t1, s2 = t1, f1 = t0, s1 = t0, i = 1, j = 1, F1, F2; ^ 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:77:37: 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); ^