Compilare: user.cpp: In function ‘int main()’: user.cpp:102:37: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(l[vy[1]]<l[vx[i]]&&r[vx[i]]<r[vy[1]]||vx[i]==vy[1]); ^ user.cpp:110:37: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(l[vy[2]]<l[vx[i]]&&r[vx[i]]<r[vy[2]]||vx[i]==vy[2]); ^ user.cpp:118:37: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(l[vz[1]]<l[vx[i]]&&r[vx[i]]<r[vz[1]]||vx[i]==vz[1]); ^ user.cpp:126:37: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(l[vz[2]]<l[vx[i]]&&r[vx[i]]<r[vz[2]]||vx[i]==vz[2]); ^ user.cpp:138:37: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(l[vz[1]]<l[vy[i]]&&r[vy[i]]<r[vz[1]]||vy[i]==vz[1]); ^ user.cpp:146:37: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(l[vz[2]]<l[vy[i]]&&r[vy[i]]<r[vz[2]]||vy[i]==vz[2]); ^ user.cpp:72:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbxyz.in","r",stdin); ^ user.cpp:73:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbxyz.out","w",stdout); ^ user.cpp:75:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.cpp:77:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&n,&x,&y,&z); ^ user.cpp:91:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^