Compilare: user.cpp: In function ‘void solve()’: user.cpp:42:47: warning: operation on ‘nr’ may be undefined [-Wsequence-point] v2[++nr] = cmmmc(v2[nr-1], v[tmp]); ^ user.cpp: In function ‘int main()’: user.cpp:54:28: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(in, "r", stdin); ^ user.cpp:55:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(out, "w", stdout); ^ user.cpp:56:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%d", &n, &m); ^ user.cpp:57:50: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int i = 1; i<= m; ++i) scanf("%d", &v[i]); ^