Compilare: main.cpp: In function 'void solve()': main.cpp:21:16: warning: array subscript has type 'char' [-Wchar-subscripts] fq[suits[1]]++; ^ main.cpp:24:20: warning: array subscript has type 'char' [-Wchar-subscripts] fq[suits[i]]++; ^ main.cpp:25:23: warning: array subscript has type 'char' [-Wchar-subscripts] if(fq[suits[i]]==1) ^ main.cpp:30:29: warning: array subscript has type 'char' [-Wchar-subscripts] fq[suits[st]]--; ^ main.cpp:31:33: warning: array subscript has type 'char' [-Wchar-subscripts] if(!fq[suits[st]]) ^ main.cpp:20:9: warning: unused variable 'len' [-Wunused-variable] int len=1,lenMax=1,st=1,indS=1,indD=1,dif=1; ^~~