Compilare: user.cpp: In function ‘void solve()’: user.cpp:102:5: warning: unused variable ‘sum1’ [-Wunused-variable] LL sum1 = 0, sum2 = 0; ^ user.cpp:102:15: warning: unused variable ‘sum2’ [-Wunused-variable] LL sum1 = 0, sum2 = 0; ^ user.cpp: In function ‘int main()’: user.cpp:162:50: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen((fileInput + ".in").c_str(), "r", stdin); ^ user.cpp:163:52: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen((fileInput + ".out").c_str(), "w", stdout); ^