Compilare: user.cpp: In function ‘int main()’: user.cpp:39:31: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(vec[v[y][i]]!=0&&vec[v[y][i]]>x+vc[y][i]||vec[v[y][i]]==x+vc[y][i]&&vccc[v[y][i]]>vccc[y]) ^ user.cpp:10:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("catun.in","r",stdin); ^ user.cpp:11:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("catun.out","w",stdout); ^ user.cpp:12:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld%lld",&n,&m,&k); ^ user.cpp:14:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&vcc[i]); ^ user.cpp:17:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld%lld",&x,&y,&d); ^