Submission #1104218

#	Time	Username	Problem	Language	Result	Execution time	Memory
1104218		8pete8	Airplane (NOI23_airplane)	C++17	100 / 100	313 ms	43164 KiB

Main

#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<cassert>
#include<unordered_map>
#include <queue>
#include <cstdint>
#include<cstring>
#include<limits.h>
#include<cmath>
#include<set>
#include<algorithm>
#include <iomanip>
#include<numeric>
#include<bitset>
using namespace std;
#define ll long long
#define f first
#define s second
#define pii pair<int,int>
#define ppii pair<int,pii>
#define vi vector<int>
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define F(n) for(int i=0;i<n;i++)
#define lb lower_bound
#define ub upper_bound
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
#pragma GCC optimize ("03,unroll-lopps")
#define int long long
using namespace std;
const int mod=998244353,mxn=5e5+5,inf=1e18,minf=-1e18,lg=20;
//#undef int
int n,k,m,q;
void setIO(string name){		
	ios_base::sync_with_stdio(0); cin.tie(0);		
	freopen((name+".in").c_str(),"r",stdin);		
	freopen((name+".out").c_str(),"w",stdout);	
}
vector<int>adj[mxn+10];
int val[mxn+10];
vector<int>solve(int st){
	vector<int>dist(n+1,inf),last(n+1,-1);
	priority_queue<pii,vector<pii>,greater<pii>>pq;
	pq.push({0,st});
	dist[st]=0;
	while(!pq.empty()){
		int cur=pq.top().s,cost=pq.top().f;
		pq.pop();
		if(dist[cur]!=cost||last[cur]==cost)continue;
		last[cur]=cost;
		for(auto i:adj[cur])if(dist[i]>max(val[i],dist[cur]+1)){
			dist[i]=max(val[i],dist[cur]+1);
			pq.push({dist[i],i});
		}
	}
	return dist;
}
int32_t main(){
	fastio
	cin>>n>>m;
	for(int i=1;i<=n;i++)cin>>val[i];
	for(int i=0;i<m;i++){
		int a,b;cin>>a>>b;
		adj[a].pb(b);
		adj[b].pb(a);
	}
	vector<int>dist1=solve(1),dist2=solve(n);
	int ans=inf;
	for(int i=1;i<=n;i++){
		ans=min(ans,max(dist1[i],dist2[i])*2);
		for(auto j:adj[i])ans=min(ans,max(dist1[i],dist2[j])*2+1);
	}
	cout<<ans;
}
/*

*/

Compilation message (stderr)

Main.cpp:32:40: warning: bad option '-funroll-lopps' to pragma 'optimize' [-Wpragmas]
   32 | #pragma GCC optimize ("03,unroll-lopps")
      |                                        ^
Main.cpp:38:23: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   38 | void setIO(string name){
      |                       ^
Main.cpp:45:24: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   45 | vector<int>solve(int st){
      |                        ^
Main.cpp:62:14: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   62 | int32_t main(){
      |              ^
Main.cpp: In function 'void setIO(std::string)':
Main.cpp:40:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |  freopen((name+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:41:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |  freopen((name+".out").c_str(),"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 22 / 22
• Subtask 2: 10 / 10
• Subtask 3: 31 / 31
• Subtask 4: 37 / 37