Compilare: user.cpp: In function ‘int main()’: user.cpp:73:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < b[p[i]].size(); ++j) ^ user.cpp:25:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("minlcm.in", "r", stdin); ^ user.cpp:26:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("minlcm.out", "w", stdout); ^ user.cpp:27:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &test); ^ user.cpp:62:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:65:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i]); ^ user.cpp:93:48: warning: ‘x2’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%lld", x1*x2 / (long long )gcd(x1, x2)); ^ user.cpp:93:48: warning: ‘x1’ may be used uninitialized in this function [-Wmaybe-uninitialized]