Compilare: user.cpp: In function ‘int main()’: user.cpp:12:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("100m.in", "r", stdin); ^ user.cpp:13:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("100m.out", "w", stdout); ^ user.cpp:15:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &n); ^ user.cpp:16:16: warning: array subscript is above array bounds [-Warray-bounds] d[1][1]=d[2][1]=1; ^ user.cpp:20:16: warning: array subscript is above array bounds [-Warray-bounds] d[2][j]=(((d[1][j]+d[1][j-1])%mod)*1LL*j)%mod; ^ user.cpp:22:24: warning: array subscript is above array bounds [-Warray-bounds] d[1][j]=d[2][j]; ^