Compilare: user.cpp: In function ‘long long int solve()’: user.cpp:52:12: warning: array subscript has type ‘char’ [-Wchar-subscripts] L[s1[i]].push_front(info(sp, i)); ^ user.cpp:53:13: warning: array subscript has type ‘char’ [-Wchar-subscripts] sp[s1[i]]++; ^ user.cpp:59:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(L[s2[i]].empty()) { ^ user.cpp:76:34: warning: array subscript has type ‘char’ [-Wchar-subscripts] poz -= max(sp[p], L[s2[i]].back().s[p]); ^ user.cpp:80:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] L[s2[i]].pop_back(); ^ user.cpp:83:13: warning: array subscript has type ‘char’ [-Wchar-subscripts] sp[s2[i]]++; ^ user.cpp: In function ‘void read(char*)’: user.cpp:27:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s); ^ user.cpp: In function ‘long long int solve()’: user.cpp:45:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp: In function ‘int main()’: user.cpp:89:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lru.in", "r", stdin); ^ user.cpp:90:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lru.out", "w", stdout); ^ user.cpp:93:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(scanf("%d", &t); t; t--) { ^