求助大佬哪里错了啊，只有80分qwq

#include <bits/stdc++.h>
using namespace std;
int x,y,z,lian;
int main()
{
    cin>>x>>y>>z;
    if(y<=0||y>315||y>=x||x>1800||z>=1000||z<=100)
    {
        cout<<"Wrong Data";
        return 0;
    }   
    else
    {
        if(z*2<=x)
        {
            cout<<"No";
            return 0;
        }
        else
        {
            cout<<"Yes"<<endl;
            if(z>=x)
            lian=1;
            else
            lian=2;
            if(lian*int(z*0.33)+y>=315)
            {
                cout<<"Great";
                return 0;
            }
            else
            {
                if(lian*int(z*0.5)+y>=315)
                {
                    cout<<"Eh..\nOK";
                    return 0;
                }
                else
                {
                    if(z*lian+y>=315)
                    {
                        cout<<"Oh..\nOh..\nYes , If he can get 5-star.";
                        return 0;
                    }
                    else
                    {
                        cout<<"No\nNo\nNo\n"<<lian*int(z*0.5);
                        return 0;
                    }
                }
            }
        }
    }
}