Main.cpp:5:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
5 | main(){
| ^~~~
Main.cpp: In function 'int main()':
Main.cpp:6:37: warning: operation on 'i' may be undefined [-Wsequence-point]
6 | cin>>n;while(i<n)cin>>a[i],p[a[i++]]=i;i=0;
| ~^~
Main.cpp:6:37: warning: operation on 'i' may be undefined [-Wsequence-point]
Main.cpp:7:12: warning: left operand of comma operator has no effect [-Wunused-value]
7 | while(i<n,x=a[i])while(i<n&&p[x]>=i)cout<<x<<"\n",i++;
| ~^~
Main.cpp:7:16: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
7 | while(i<n,x=a[i])while(i<n&&p[x]>=i)cout<<x<<"\n",i++;