Compilare: main.cpp: In function 'int32_t main()': main.cpp:206:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int len = 1;len <= s.size();len++) ~~~~^~~~~~~~~~~ main.cpp:211:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = len;i <= s.size();i++) ~~^~~~~~~~~~~ main.cpp:215:47: warning: array subscript has type 'char' [-Wchar-subscripts] ll aux = 1LL * p[k][len] * mapat[s[i - 1]]; ^ main.cpp:240:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = len;i <= s.size();i++) ~~^~~~~~~~~~~ main.cpp:176:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen(PROB_NAME".in", "r", stdin); ^ main.cpp:177:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen(PROB_NAME".out", "w", stdout); ^