【优先队列】洛谷 P2827 蚯蚓
2021-03-31 20:59:00 # ACM

题链

最长的蚯蚓被砍两截之后,其余的蚯蚓长度会增加,与其加其余蚯蚓不如对这两只蚯蚓操作,可定义一个$buff$表示其余蚯蚓需要增加多少长度,当拿出最长的那只蚯蚓时,就需要加上$buff$,当然被剪断的变成两条就需要减去当前$buff$再压入队列,保证下次拿出来时加上$buff$是应有的长度;

一个队列存原数组,另外两个队列分别存砍断的蚯蚓的两部分,可知这两个队列是递减的,所以普通队列就行;

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//#pragma GCC optimize("O2")
#include <bits/stdc++.h>
using namespace std;
//#include<ext/rope>
//using namespace __gnu_cxx;
//#include <ext/pb_ds/priority_queue.hpp>
//using namespace __gnu_pbds;
#define Combine Pair, greater<Pair>, pairing_heap_tag
#define LL long long
#define ll long long
#define Pair pair<double,LL>
#define ULL unsigned long long
#define ls rt<<1
#define rs rt<<1|1
#define one first
#define two second
#define MS 7000009
#define INF 1e9
#define DBINF 1e100
#define Pi acos(-1.0)
#define eps 1e-9
#define mod 1000000007
#define mod1 39989
#define mod2 1000000000

LL n,m;
LL ac[MS];
LL p[MS];
priority_queue<LL,vector<LL>,less<LL> > QQ;
queue<LL> Q[3];
stack<LL > sta;

int which(){
if(Q[1].empty() && Q[2].empty()) return 0;
if(!Q[0].empty() && Q[0].front() >= max(Q[2].front(),Q[1].front())) return 0;
else if(Q[1].front() >= Q[2].front()) return 1;
return 2;
}

int main() {
ios::sync_with_stdio(false);
LL num,u,v,t;
cin >> n >> m >> num >> u >> v >> t;
for(int i=1;i<=n;i++){
cin >> p[i];
}
sort(p+1,p+n+1);
for(int i=n;i>=1;i--){
Q[0].push(p[i]);
}
LL buff = 0;
for(int i=1;i<=m;i++){
int wh = which();
ac[i] = Q[wh].front()+buff;
LL t1 = ac[i]*u/v;
LL t2 = ac[i]-t1;
Q[wh].pop();
buff += num;
Q[1].push(t2-buff);
Q[2].push(t1-buff);
}
for(int i=1;i<=m;i++){
if(i%t == 0) cout << ac[i] << " ";
}
cout << endl;
for(int i=0;i<=2;i++)
while(!Q[i].empty()){
QQ.push(Q[i].front());
Q[i].pop();
}
for(int i=1;!QQ.empty();i++){
if(i%t == 0) cout << QQ.top()+buff << " ";
QQ.pop();
}
cout << endl;


return 0;
}
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