Compilare: user.cpp: In function ‘void solve(int)’: user.cpp:20:37: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[i][ii] += a[ s[j] ][ s[j + 1] ]; ^ user.cpp:20:49: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[i][ii] += a[ s[j] ][ s[j + 1] ]; ^ user.cpp:27:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < w[i].size(); j++){ ~~^~~~~~~~~~~~~ user.cpp:35:37: warning: array subscript has type ‘char’ [-Wchar-subscripts] d0 += a[ s[ v[x].f - 1] ][ s[ v[x].f ] ]; ^ user.cpp:35:52: warning: array subscript has type ‘char’ [-Wchar-subscripts] d0 += a[ s[ v[x].f - 1] ][ s[ v[x].f ] ]; ^ user.cpp:36:37: warning: array subscript has type ‘char’ [-Wchar-subscripts] d1 += a[ s[ v[x].f - 1] ][ s[ v[x].s ] ]; ^ user.cpp:36:52: warning: array subscript has type ‘char’ [-Wchar-subscripts] d1 += a[ s[ v[x].f - 1] ][ s[ v[x].s ] ]; ^ user.cpp:38:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] d0 += a[ s[j - 1] ][ s[j] ]; ^ user.cpp:38:43: warning: array subscript has type ‘char’ [-Wchar-subscripts] d0 += a[ s[j - 1] ][ s[j] ]; ^ user.cpp:39:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] d1 += a[ s[j - 1] ][ s[j] ]; ^ user.cpp:39:43: warning: array subscript has type ‘char’ [-Wchar-subscripts] d1 += a[ s[j - 1] ][ s[j] ]; ^ user.cpp:42:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(jj = 1; jj < w[i].size(); jj++){ ~~~^~~~~~~~~~~~~ user.cpp:46:56: warning: array subscript has type ‘char’ [-Wchar-subscripts] e0 = d[y][0] + max(d0 + a[ s[ v[x].s ] ][ s[ v[y].f ] ], d1 + a[ s[ v[x].f ] ][ s[ v[y].f ] ] ); ^ user.cpp:46:71: warning: array subscript has type ‘char’ [-Wchar-subscripts] e0 = d[y][0] + max(d0 + a[ s[ v[x].s ] ][ s[ v[y].f ] ], d1 + a[ s[ v[x].f ] ][ s[ v[y].f ] ] ); ^ user.cpp:46:94: warning: array subscript has type ‘char’ [-Wchar-subscripts] e0 = d[y][0] + max(d0 + a[ s[ v[x].s ] ][ s[ v[y].f ] ], d1 + a[ s[ v[x].f ] ][ s[ v[y].f ] ] ); ^ user.cpp:46:109: warning: array subscript has type ‘char’ [-Wchar-subscripts] e0 = d[y][0] + max(d0 + a[ s[ v[x].s ] ][ s[ v[y].f ] ], d1 + a[ s[ v[x].f ] ][ s[ v[y].f ] ] ); ^ user.cpp:47:56: warning: array subscript has type ‘char’ [-Wchar-subscripts]