Compilare: main.cpp: In function 'int main()': main.cpp:22:13: warning: array subscript has type 'char' [-Wchar-subscripts] f[s[i]]++; ^ main.cpp:23:20: warning: array subscript has type 'char' [-Wchar-subscripts] v[i] = f[s[i]]; ^ main.cpp:40:44: warning: array subscript has type 'char' [-Wchar-subscripts] printf("%lld\n", p2 / 2 * (f[s[r]] + f[rev(s[r])]) + v[s[r]]); ^ main.cpp:40:70: warning: array subscript has type 'char' [-Wchar-subscripts] printf("%lld\n", p2 / 2 * (f[s[r]] + f[rev(s[r])]) + v[s[r]]); ^ main.cpp:50:32: warning: array subscript has type 'char' [-Wchar-subscripts] p2 = p2 / 2 * (f[s[r]] + f[rev(s[r])]) + v[r]; ^ main.cpp:55:41: warning: array subscript has type 'char' [-Wchar-subscripts] printf("%lld\n", p2 + f[s[i]]); ^ main.cpp:61:44: warning: array subscript has type 'char' [-Wchar-subscripts] printf("%lld\n", p2 / 2 * (f[s[r]] + f[rev(s[r])]) + v[r]); ^ main.cpp:71:32: warning: array subscript has type 'char' [-Wchar-subscripts] p2 = p2 / 2 * (f[s[r]] + f[rev(s[r])]) + v[r]; ^ main.cpp:76:41: warning: array subscript has type 'char' [-Wchar-subscripts] printf("%lld\n", p2 + f[s[i]]); ^ main.cpp:16:35: 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:17:37: 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:19:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld ", &n, &k); ^ main.cpp:21:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c", &s[i]); ^ main.cpp:26:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &x); ^