Compilare: user.cpp: In function ‘int main()’: user.cpp:29:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("adunare.in", "r", stdin); ^ user.cpp:30:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("adunare.out", "w", stdout); ^ user.cpp:33:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &n, &p); ^ user.cpp:37:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%lld", &v[i]); ^ user.cpp:81:53: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] dp[i][k] = sum[i] + st[poz].a * part[i] + st[poz].b; ^