Submission #1113733

#	Time	Username	Problem	Language	Result	Execution time	Memory
1113733		thelegendary08	Fire (BOI24_fire)	C++17	31 / 100	2068 ms	6240 KiB

Main

#include<bits/stdc++.h>
#define pb push_back
#define int long long
#define vi vector<int>
#define vvi vector<vector<int>>
#define pii pair<int, int>
#define vpii vector<pair<int, int>>
#define vc vector<char>
#define vb vector<bool>
#define mii map<int,int>
#define f0r(i,n) for(int i=0;i<n;i++)
#define FOR(i,k,n) for(int i=k;i<n;i++)
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define in(a) int a; cin>>a
#define in2(a,b) int a,b; cin>>a>>b
#define in3(a,b,c) int a,b,c; cin>>a>>b>>c
#define in4(a,b,c,d) int a,b,c,d; cin>>a>>b>>c>>d
#define vin(v,n); vi v(n); f0r(i,n){cin>>v[i];}
#define out(a) cout<<a<<'\n'
#define out2(a,b) cout<<a<<' '<<b<<'\n'
#define out3(a,b,c) cout<<a<<' '<<b<<' '<<c<<'\n'
#define out4(a,b,c,d) cout<<a<<' '<<b<<' '<<c<<' '<<d<<'\n'
#define vout(v) for(auto u : v){cout<<u<<' ';} cout<<'\n'
#define dout(a) cout<<a<<' '<<#a<<'\n'
#define dout2(a,b) cout<<a<<' '<<#a<<' '<<b<<' '<<#b<<'\n'
#define yn(x); if(x){cout<<"YES"<<'\n';}else{cout<<"NO"<<'\n';}
const int leg = 1e9 + 7;
const int mod = 998244353;
using namespace std;
signed main(){
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	//ifstream cin(".in");
	//ofstream cout(".out");
	in2(n,m);
	vpii v;
	f0r(i,n){
		in2(a,b);
		v.pb({a,b});
	}
	sort(all(v));
	int ans = 4e18;
	f0r(i,n){
		vpii w;
		int st = v[i].first;
		f0r(j, n){
			int a = v[j].first;
			int b = v[j].second;
			if(v[j].first > v[j].second)b += m;
			if(a < st){
				a += m;
				b += m;
			}
			w.pb({a,b});
		}
		f0r(j,n){
			//cout<<w[j].first<<' '<<w[j].second<<'\n';
		}
		vvi adj(n);
		f0r(j, n){
			FOR(k, j+1, n){
				pii a = w[j];
				pii b = w[k];
				if(a.first > b.first)swap(a, b);
				if(a.second >= b.first){
					adj[j].pb(k);
					adj[k].pb(j);
				}
			}
		}
		queue<int>q;
		q.push(i);
		vi dist(n, 4e18);
		dist[i] = 1;
		while(!q.empty()){
			int node = q.front();
			q.pop();
			for(auto u : adj[node]){
				if(dist[u] > dist[node] + 1){
					dist[u] = dist[node] + 1;
					q.push(u);
				}
			}
		}
		//vout(dist);
		int mn = 4e18;
		f0r(j, n){
			if(w[j].second >= st + m){
				mn = min(mn, dist[j]);
			}
		}
		ans = min(ans, mn);
		//out("");
	}
	if(ans == 4e18)out(-1);
	else out(ans);
}

• Subtask 1: 14 / 14
• Subtask 2: 17 / 17
• Subtask 3: 0 / 9
• Subtask 4: 0 / 13
• Subtask 5: 0 / 21
• Subtask 6: 0 / 26