# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
278742 | arnold518 | Circus (Balkan15_CIRCUS) | C++14 | 112 ms | 3072 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "circus.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const int MAXN = 3e5;
const int INF = 2e9;
int N, M, P[MAXN+10];
int dist[MAXN+10];
struct Queue
{
int u, w;
bool operator < (const Queue &p) const { return w>p.w; }
};
void init(int _N, int _M, int _P[])
{
N=_N; M=_M;
for(int i=1; i<=N; i++) P[i]=_P[i-1];
sort(P+1, P+N+1);
N=unique(P+1, P+N+1)-P-1;
P[0]=M;
for(int i=0; i<=3*N; i++) dist[i]=INF;
priority_queue<Queue> PQ;
PQ.push({2*N, M-P[N]}); dist[0]=0;
while(!PQ.empty())
{
Queue now=PQ.top(); PQ.pop();
if(dist[now.u]<=now.w) continue;
dist[now.u]=now.w;
if(now.u<=N)
{
int t=upper_bound(P+1, P+N+1, P[now.u]-now.w)-P-1;
if(t!=0) PQ.push({N+t, P[now.u]-P[t]});
t=lower_bound(P+1, P+N+1, P[now.u]+now.w)-P;
if(t!=N+1) PQ.push({N*2+t, P[t]-P[now.u]});
}
else if(now.u<=2*N)
{
PQ.push({now.u-N, now.w});
if(now.u==N+1) continue;
PQ.push({now.u-1, now.w+P[now.u-N]-P[now.u-N-1]});
}
else
{
PQ.push({now.u-2*N, now.w});
if(now.u==3*N) continue;
PQ.push({now.u+1, P[now.u+1-2*N]-P[now.u-2*N]});
}
}
}
int minLength(int D)
{
int ans=M-D;
for(int i=1; i<=N; i++) if(dist[i]<=abs(P[i]-D)) ans=min(ans, abs(P[i]-D));
return ans;
}
Compilation message (stderr)
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