Uvalive 4954 Lawn mower

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstring>
using namespace std;

int N,M;
double W,x[1010],y[1010];
bool f1,f2;
int main(){
while(scanf("%d%d%lf",&N,&M,&W)!=EOF){
if(N==0&&M==0&&W==0){
break;
}
//cout<<"test: "<<N<<" "<<M<<" "<<W<<"\n";
f1=f2=true;
for(int i=1;i<=N;i++){
scanf("%lf",&x[i]);
}
x[0]=-W/2;
x[N+1]=75+W/2;
//cout<<"test: "<<x[0]<<" "<<x[N+1]<<"\n";
sort(x,x+N+2);
//
//for(int i=0;i<N+2;i++) cout<<x[i]<<" ";
//cout<<"\n";
//
for(int i=0;i<N+1;i++){
if(x[i+1]-x[i]>W){
f1=false;
break;
}
}
for(int i=1;i<=M;i++){
scanf("%lf",&y[i]);
}
y[0]=-W/2;
y[M+1]=100+W/2;
//cout<<"test: "<<y[0]<<" "<<y[M+1]<<"\n";
sort(y,y+M+2);
//
//for(int i=0;i<M+2;i++) cout<<y[i]<<" ";
//cout<<"\n";
//
for(int i=0;i<M+1;i++){
if(y[i+1]-y[i]>W){
f2=false;
break;
}
}
if(f1&&f2){
printf("YES\n");
}
else printf("NO\n");

}
}