Compilare: user.cpp: In function ‘int memo(int, int, int, int)’: user.cpp:19:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a[i][j]=='*') ^ user.cpp:28:52: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[i][j][k][t]|=(memo(i+dx[dir[sir[k-1]]],j+dy[dir[sir[k-1]]],k-1,l)-1); ^ user.cpp:28:72: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[i][j][k][t]|=(memo(i+dx[dir[sir[k-1]]],j+dy[dir[sir[k-1]]],k-1,l)-1); ^ user.cpp:31:50: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[i][j][k][t]|=(memo(i+dx[dir[sir[k]]],j+dy[dir[sir[k]]],k,l)-1); ^ user.cpp:31:68: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[i][j][k][t]|=(memo(i+dx[dir[sir[k]]],j+dy[dir[sir[k]]],k,l)-1); ^ user.cpp: In function ‘int main()’: user.cpp:39:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("cobai.in","r",stdin); ^ user.cpp:40:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("cobai.out","w",stdout); ^ user.cpp:42:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N,&M); ^ user.cpp:44:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", (a[i]+1)); ^ user.cpp:45:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", (sir+1)); ^