HDU 1873 is waiting for medical treatment

Priority queue, water question.

Three doctors should have three priority queues.

Priority queue should be initialized for multiple groups of data

#include<cstdio>#include<cstring>#include<string>#include<queue>#include<algorithm>#include<map>#include<stack>#include<iostream>#include<list>#include<set>#include<vector>#include<cmath>#define INF 0x7fffffff#define eps 1e-8#define LL long long#define PI 3.141592654#define CLR(a,b) memset(a,b,sizeof(a))#define FOR(i,a,b) for(int i=a;i<b;i++)#define FOR0(i,a,b) for(int i=a;i>=b;i--)#define pb push_back#define debug puts("==fuck==")#define acfun std::ios::sync_with_stdio(false)#define SIZE 20+10using namespace std;struct lx{    int value;    int ID;    friend bool operator <( lx a,lx b)    {        if(a.value==b.value)            return a.ID>b.ID;        return a.value<b.value;    }};int main(){    int t;    priority_queue<lx> q[4];    int Id=1;    while(scanf("%d",&t)!=EOF)    {        char head[11];        scanf("%s",head);        if(strcmp(head,"OUT")==0)        {            int value;            scanf("%d",&value);            if(q[value].empty())                puts("EMPTY");            else            {                lx now;                now=q[value].top();                q[value].pop();                printf("%d\n",now.ID);            }        }        else if(strcmp(head,"IN")==0)        {            int value;            lx now;            scanf("%d%d",&value,&now.value);            now.ID=Id++;            q[value].push(now);        }        t--;        if(t==0)        {            FOR(i,1,4)            {                while(!q[i].empty())                    q[i].pop();            }            Id=1;        }    }}

HDU 1873 is waiting for medical treatment