Compilare: user.cpp: In function ‘int main()’: user.cpp:28:22: warning: unused variable ‘pro’ [-Wunused-variable] long long lc,pro; ^ user.cpp:19:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("suman.in", "r", stdin); ^ user.cpp:20:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("suman.out", "w", stdout); ^ user.cpp:22:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &k); ^ user.cpp:24:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^ user.cpp:44:17: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(nr%2 == 0){ ^ user.cpp:42:20: warning: ‘lc’ may be used uninitialized in this function [-Wmaybe-uninitialized] lcm[i] = lc; ^