Compilare: user.cpp: In function ‘int solve(int, int, char)’: user.cpp:9:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(dp[lin][col][dir]>0) ^ user.cpp:10:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] return dp[lin][col][dir]; ^ user.cpp:19:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[lin][col][dir]=1; ^ user.cpp:21:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[lin][col][dir]=solve(lin+dl[poz],col+dc[poz],(poz+2)%4)+1; ^ user.cpp:22:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] return dp[lin][col][dir]; ^ user.cpp: In function ‘int main()’: user.cpp:61:9: warning: ‘dir’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(i!=dir&&mat[l][c]>=mat[l+dl[i]][c+dc[i]]&&min>mat[l][c]-mat[l+dl[i]][c+dc[i]]){ ^ user.cpp:57:23: warning: ‘c’ may be used uninitialized in this function [-Wmaybe-uninitialized] while(!(l==0&&c==0)){ ^ user.cpp:57:23: warning: ‘l’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:48:10: warning: ‘d’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(p!=d) ^