Compilare: user.cpp: In function ‘char solve(char, char, char, char, char, char)’: user.cpp:8:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(u[a][b][c][d][e]) return u[a][b][c][d][e]; ^ user.cpp:8:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(u[a][b][c][d][e]) return u[a][b][c][d][e]; ^ user.cpp:8:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(u[a][b][c][d][e]) return u[a][b][c][d][e]; ^ user.cpp:8:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(u[a][b][c][d][e]) return u[a][b][c][d][e]; ^ user.cpp:8:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(u[a][b][c][d][e]) return u[a][b][c][d][e]; ^ user.cpp:8:36: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(u[a][b][c][d][e]) return u[a][b][c][d][e]; ^ user.cpp:8:39: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(u[a][b][c][d][e]) return u[a][b][c][d][e]; ^ user.cpp:8:42: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(u[a][b][c][d][e]) return u[a][b][c][d][e]; ^ user.cpp:8:45: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(u[a][b][c][d][e]) return u[a][b][c][d][e]; ^ user.cpp:8:48: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(u[a][b][c][d][e]) return u[a][b][c][d][e]; ^ user.cpp:9:8: warning: array subscript has type ‘char’ [-Wchar-subscripts] u[a][b][c][d][e]=1; ^ user.cpp:9:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] u[a][b][c][d][e]=1; ^ user.cpp:9:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] u[a][b][c][d][e]=1; ^ user.cpp:9:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] u[a][b][c][d][e]=1; ^ user.cpp:9:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] u[a][b][c][d][e]=1; ^ user.cpp:12:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] u[a][b][c][d][e]=4-solve(a, b, d-1, c, e+2, f-1); ^ user.cpp:12:19: warning: array subscript has type ‘char’ [-Wchar-subscripts]