Compilare: main.cpp: In function 'int main()': main.cpp:29:16: warning: array subscript has type 'char' [-Wchar-subscripts] 29 | fr[ch]++; | ^~ main.cpp:25:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] 25 | for(int i=1;i<=m;i++) | ^~~ main.cpp:32:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for' 32 | for(int i=m;i<=n;i++) | ^~~