Compilare: main.cpp: In function 'int main()': main.cpp:13:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<t.size(); i++) { ~^~~~~~~~~ main.cpp:14:50: warning: array subscript has type 'char' [-Wchar-subscripts] long long aux = ((long long)i*(i+1)/2-vf[t[i]]) % modulo; ^ main.cpp:17:12: warning: array subscript has type 'char' [-Wchar-subscripts] vf[t[i]] = (vf[t[i]] + i + 1) % modulo; ^ main.cpp:17:24: warning: array subscript has type 'char' [-Wchar-subscripts] vf[t[i]] = (vf[t[i]] + i + 1) % modulo; ^