Compilare: user.cpp: In function ‘int solve(lld)’: user.cpp:49:19: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] int ans = ((2 - n & 1) * solve((n - 1) / 2) * 1LL * solve(n - 1 - (n - 1) / 2)) % MOD; ^ user.cpp: In function ‘int main()’: user.cpp:58:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(inputFile.c_str(), "r", stdin); ^ user.cpp:59:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(outputFile.c_str(), "w", stdout); ^ user.cpp:62:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &Q); ^ user.cpp:65:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &N); ^