Compilare: user.cpp: In function ‘int main()’: user.cpp:122:82: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(biti[x]!=k&&((1<<biti[x])&i)&&hamilton[j][k][i]>hamilton[j][biti[x]][i-(1<<k)]+E[biti[x]][k]) ^ user.cpp:122:103: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(biti[x]!=k&&((1<<biti[x])&i)&&hamilton[j][k][i]>hamilton[j][biti[x]][i-(1<<k)]+E[biti[x]][k]) ^ user.cpp:123:50: warning: array subscript has type ‘char’ [-Wchar-subscripts] hamilton[j][k][i]=hamilton[j][biti[x]][i-(1<<k)]+E[biti[x]][k]; ^ user.cpp:123:71: warning: array subscript has type ‘char’ [-Wchar-subscripts] hamilton[j][k][i]=hamilton[j][biti[x]][i-(1<<k)]+E[biti[x]][k]; ^ user.cpp:141:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(dp[j+1][biti[k]]>dp[i+1][p]+hamilton[biti[x]][biti[k]][conf]+E[p][biti[x]]) ^ user.cpp:141:60: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(dp[j+1][biti[k]]>dp[i+1][p]+hamilton[biti[x]][biti[k]][conf]+E[p][biti[x]]) ^ user.cpp:141:69: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(dp[j+1][biti[k]]>dp[i+1][p]+hamilton[biti[x]][biti[k]][conf]+E[p][biti[x]]) ^ user.cpp:141:89: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(dp[j+1][biti[k]]>dp[i+1][p]+hamilton[biti[x]][biti[k]][conf]+E[p][biti[x]]) ^ user.cpp:142:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[j+1][biti[k]]=dp[i+1][p]+hamilton[biti[x]][biti[k]][conf]+E[p][biti[x]]; ^ user.cpp:142:58: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[j+1][biti[k]]=dp[i+1][p]+hamilton[biti[x]][biti[k]][conf]+E[p][biti[x]]; ^ user.cpp:142:67: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[j+1][biti[k]]=dp[i+1][p]+hamilton[biti[x]][biti[k]][conf]+E[p][biti[x]]; ^ user.cpp:142:87: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[j+1][biti[k]]=dp[i+1][p]+hamilton[biti[x]][biti[k]][conf]+E[p][biti[x]]; ^ user.cpp: In function ‘char nextch()’: user.cpp:10:29: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf,1,MAXBUF,fi); ^