#include <stdio.h>
#define size 1000001
struct outer
{
int id;
struct inner
{
int attr,val,priority;
}z[size];
}s[size];
int main(void) {
int n,m,i,p,q,r,x;
for(i=0;i<n;i++)
{
scanf("%d%d%d%d",&p
,&q
,&r
,&x
);
if(s[p].z[q].priority<=x)
{
s[p].z[q].attr=q;
s[p].z[q].val=r;
s[p].z[q].priority=x;
}
}
for(i=0;i<m;i++)
{
}
return 0;
}
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