Compilare: user.cpp: In function ‘void C(int, int)’: user.cpp:36:15: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(j>r||(i<=m&&a[i]<a[j]||(a[i]==a[j]&&b[i]<b[j]))) ^ user.cpp: In function ‘int main()’: user.cpp:46:24: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:46:24: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:46:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:48:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a[i],&b[i]),poz[i]=i; ^ user.cpp:55:49: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&x[i],&y[i],&z[i]),w[i]=i; ^