Compilare: user.cpp: In function ‘int main()’: user.cpp:24:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(!cont[s[i]]) k--; ^ user.cpp:25:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] cont[s[i]]++; ^ user.cpp:34:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(!cont[s[i]]){ ^ user.cpp:37:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] cont[c]--; ^ user.cpp:38:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(!cont[c]) break; ^ user.cpp:41:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] cont[s[i]]++; ^ user.cpp:44:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ans < Q.size()){ ^ user.cpp:15:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("teatru.in","r",stdin); ^ user.cpp:16:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("teatru.out","w",stdout); ^ user.cpp:18:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld",&n,&k); ^ user.cpp:19:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",s+1); ^