Compilare: user.cpp: In function ‘void read()’: user.cpp:14:23: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘unsigned char*’ [-Wformat=] scanf("%d", &x); ^ user.cpp:18:23: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘unsigned char*’ [-Wformat=] scanf("%d", &x); ^ user.cpp:12:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &M); ^ user.cpp:14:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ user.cpp:18:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ user.cpp: In function ‘int main()’: user.cpp:59:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cmlsc.in","rt",stdin); ^ user.cpp:60:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cmlsc.out","wt",stdout); ^