Compilare: user.cpp: In function ‘int main()’: user.cpp:19:33: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘short int*’ [-Wformat=] scanf("%d", &M[i][j]); ^ user.cpp:26:36: warning: overflow in implicit constant conversion [-Woverflow] for(int i=0;i<=N+1;++i) M[0][i]=INF,M[N+1][i]=INF,M[i][0]=INF,M[N+1][0]=INF; ^ user.cpp:26:50: warning: overflow in implicit constant conversion [-Woverflow] for(int i=0;i<=N+1;++i) M[0][i]=INF,M[N+1][i]=INF,M[i][0]=INF,M[N+1][0]=INF; ^ user.cpp:26:62: warning: overflow in implicit constant conversion [-Woverflow] for(int i=0;i<=N+1;++i) M[0][i]=INF,M[N+1][i]=INF,M[i][0]=INF,M[N+1][0]=INF; ^ user.cpp:26:76: warning: overflow in implicit constant conversion [-Woverflow] for(int i=0;i<=N+1;++i) M[0][i]=INF,M[N+1][i]=INF,M[i][0]=INF,M[N+1][0]=INF; ^ user.cpp:13:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alpin.in","r",stdin); ^ user.cpp:14:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alpin.out","w",stdout); ^ user.cpp:15:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.cpp:19:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &M[i][j]); ^