Team Queue(POJ 2259)
题意:有若干个团体,每个团体有若干个元素,他们按次序来排队,如果队列中已经有同一团体的元素在,则可以插队到它后面,模拟这个过程
思路:用map存下元素与团体的关系,并开2个队列,一个存整体队伍的排列(毕竟同一个团体的元素会连在一起),另一个存每个团体内部的排列。
#include<cstdio>
#include<cmath>
#include<iostream>
#include<algorithm>
#include<queue>
#include<map>
using namespace std;
int read(){
char ch=getchar();int f=,t=;
while (ch<''||ch>'') {if (ch=='-') f=-;ch=getchar();}
while (''<=ch&&ch<=''){t=t*+ch-'';ch=getchar();}
return t*f;
}
int main(){
int n,T=;
while (scanf("%d",&n)!=EOF&&n!=){
printf("Scenario #%d\n",++T);
map<int,int>mp;
for (int i=;i<=n;i++){
int x=read();
while (x--){
mp[read()]=i;
}
}
queue<int> qAll,qTeam[];
char s[];
scanf("%s",s);
while (s[]!='S'){
if (s[]=='E'){
int x=read();
int y=mp[x];
if (qTeam[y].empty()) qAll.push(y);
qTeam[y].push(x);
}else if (s[]=='D'){
int x=qAll.front();
printf("%d\n",qTeam[x].front());qTeam[x].pop();
if (qTeam[x].empty()) qAll.pop();
}
scanf("%s",s);
}
printf("\n");
}
}
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