Compilare: user.cpp: In function ‘int main()’: user.cpp:39:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("monezi.in", "r", stdin); ^ user.cpp:40:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("monezi.out", "w", stdout); ^ user.cpp:41:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &s); ^ user.cpp:43:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^ user.cpp: In function ‘void solve()’: user.cpp:29:62: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] if((j > nr && (d[i][j - nr] || d[prev][j - nr])) || d[prev][j]) ^ user.cpp:25:26: warning: ‘pos’ may be used uninitialized in this function [-Wmaybe-uninitialized] int prev = i - (1<<pos); ^