Compilare: user.cpp: In function ‘void sol()’: user.cpp:64:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < re.size(); ++j) ^ user.cpp: In function ‘int main()’: user.cpp:76:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.cpp:77:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("parcele2.in", "r", stdin); ^ user.cpp:78:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("parcele2.out", "w", stdout); ^