Compilare: user.cpp: In function ‘int main()’: user.cpp:18:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bombo.in","r",stdin); ^ user.cpp:19:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bombo.out","w",stdout); ^ user.cpp:21:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&N,&M); ^ user.cpp:26:61: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&B[i[1]][i[2]].first,&B[i[1]][i[2]].second); ^ user.cpp:37:13: warning: array subscript is below array bounds [-Warray-bounds] D[0][left[1]][left[2]][left[3]][left[4]]=0; ^