C++ 代码优化：减少循环次数和不必要的计算

#include\n#include\nusing namespace std;\nlong int a[10001],b[10001],i,dnm=0,fa=0,fb=0;\nint n,m; \nint main(){\n cin>>n;\n for(i=1;i<=n;i++){\n cin>>a[i];\n b[i]=a[i]-b[i-1];\n if(i>1){\n b[i]=b[i]-b[i-1];\n }\n }\n for(i=1;i<=n;i++){\n cout<<b[i]<<" ";\n }\n \n return 0;\n}