Compilare: main.cpp: In function 'int main()': main.cpp:44:13: warning: array subscript has type 'char' [-Wchar-subscripts] p[a[i]].push_back(i); ^ main.cpp:47:16: warning: array subscript has type 'char' [-Wchar-subscripts] f[i][a[i]]++; ^ main.cpp:52:18: warning: array subscript has type 'char' [-Wchar-subscripts] if(ind[b[i]] < p[b[i]].size()) { ^ main.cpp:52:28: warning: array subscript has type 'char' [-Wchar-subscripts] if(ind[b[i]] < p[b[i]].size()) { ^ main.cpp:52:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ind[b[i]] < p[b[i]].size()) { ~~~~~~~~~~^~~~~~~~~~~~~~~~ main.cpp:53:32: warning: array subscript has type 'char' [-Wchar-subscripts] ans += i - solve(p[b[i]].back()); ^ main.cpp:54:15: warning: array subscript has type 'char' [-Wchar-subscripts] p[b[i]].pop_back(); ^ main.cpp:58:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ind[j] < p[j].size() && p[j][ind[j]] < mn) ~~~~~~~^~~~~~~~~~~~~ main.cpp:62:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ind[j] < p[j].size() && p[j][ind[j]] == mn) ~~~~~~~^~~~~~~~~~~~~