Compilare: main.cpp: In function 'int main()': main.cpp:22:18: warning: array subscript has type 'char' [-Wchar-subscripts] 22 | while(!q[ch].empty() && i-q[ch].front()>k) | ^~ main.cpp:22:37: warning: array subscript has type 'char' [-Wchar-subscripts] 22 | while(!q[ch].empty() && i-q[ch].front()>k) | ^~ main.cpp:23:15: warning: array subscript has type 'char' [-Wchar-subscripts] 23 | q[ch].pop_front(); | ^~ main.cpp:24:15: warning: array subscript has type 'char' [-Wchar-subscripts] 24 | if(!q[ch].empty()) | ^~ main.cpp:25:24: warning: array subscript has type 'char' [-Wchar-subscripts] 25 | dp[i]=dp[q[ch].front()]+1; | ^~ main.cpp:29:18: warning: array subscript has type 'char' [-Wchar-subscripts] 29 | while(!q[ch].empty() && dp[i]>dp[q[ch].back()]) | ^~ main.cpp:29:44: warning: array subscript has type 'char' [-Wchar-subscripts] 29 | while(!q[ch].empty() && dp[i]>dp[q[ch].back()]) | ^~ main.cpp:30:15: warning: array subscript has type 'char' [-Wchar-subscripts] 30 | q[ch].pop_back(); | ^~ main.cpp:33:11: warning: array subscript has type 'char' [-Wchar-subscripts] 33 | q[ch].push_back(i); | ^~