Compilare: user.cpp: In function ‘void bkt()’: user.cpp:16:10: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(k>1&&st[k]>lv[st2[k-1]][0]||k==1&&st[k]>pmax) break; ^ user.cpp:22:16: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(k==1||k>1&&!ales[lv[st2[k-1]][st[k]]]) ^ user.cpp: In function ‘int main()’: user.cpp:59:21: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(v[i].l==v[j].l&&abs(v[i].c-v[j].c)==1||v[i].c==v[j].c ^ user.cpp:60:68: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] &&abs(v[i].l-v[j].l)==1||abs(v[i].l-v[j].l)==abs(v[i].c-v[j].c)&&abs(v[i].c-v[j].c)==1) vec[i][j]=vec[j][i]=1; ^ user.cpp:41:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] { freopen("suma3.in","r",stdin); ^ user.cpp:42:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("suma3.out","w",stdout); ^ user.cpp:45:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&m,&n); ^ user.cpp:48:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i][j]); ^