Compilare: main.cpp: In function 'void findch()': main.cpp:41:17: warning: array subscript has type 'char' [-Wchar-subscripts] frec=n1*f[ch]+n2*f[caps(ch)]+upper_bound(poz[s[y]].begin(), poz[s[y]].end(), y)-poz[s[y]].begin(); ^ main.cpp:41:32: warning: array subscript has type 'char' [-Wchar-subscripts] frec=n1*f[ch]+n2*f[caps(ch)]+upper_bound(poz[s[y]].begin(), poz[s[y]].end(), y)-poz[s[y]].begin(); ^ main.cpp:41:54: warning: array subscript has type 'char' [-Wchar-subscripts] frec=n1*f[ch]+n2*f[caps(ch)]+upper_bound(poz[s[y]].begin(), poz[s[y]].end(), y)-poz[s[y]].begin(); ^ main.cpp:41:73: warning: array subscript has type 'char' [-Wchar-subscripts] frec=n1*f[ch]+n2*f[caps(ch)]+upper_bound(poz[s[y]].begin(), poz[s[y]].end(), y)-poz[s[y]].begin(); ^ main.cpp:41:93: warning: array subscript has type 'char' [-Wchar-subscripts] frec=n1*f[ch]+n2*f[caps(ch)]+upper_bound(poz[s[y]].begin(), poz[s[y]].end(), y)-poz[s[y]].begin(); ^ main.cpp: In function 'int main()': main.cpp:51:15: warning: array subscript has type 'char' [-Wchar-subscripts] f[s[i]]++; ^ main.cpp:52:17: warning: array subscript has type 'char' [-Wchar-subscripts] poz[s[i]].push_back(i); ^ main.cpp:45:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("caps.in","r",stdin); ^ main.cpp:46:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("caps.out","w",stdout); ^ main.cpp:47:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld\n",&len,&q); ^ main.cpp:48:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s",s); ^ main.cpp:57:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&k); ^