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답안 #978814

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
978814 2024-05-09T17:50:39 Z MilosMilutinovic Escape Route 2 (JOI24_escape2) C++14
100 / 100
 1211 ms 242016 KB 
#include<bits/stdc++.h>
 
#define pb push_back
#define fi first
#define se second
#define mp make_pair
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef long double ld;
 
template <typename T> bool chkmin(T &x,T y){return x>y?x=y,1:0;}
template <typename T> bool chkmax(T &x,T y){return x<y?x=y,1:0;}
 
ll readint(){
	ll x=0,f=1; char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
	while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
	return x*f;
}

const int blk=210;
int n,t,q;
int m[100005];
vector<pii> a[100005];
vector<int> nxt[100005];
vector<int> idx[100005][18];
vector<ll> jmp[100005][18];
ll ans[300005],bst[100005];
vector<pii> qs[100005];
vector<ll> dist[100005];
int lg2[100005];
vector<bool> ok[100005];

ll lift(int x,int y,int d){
	ll ret=0;
	while(d){
		ret+=jmp[x][lg2[d]][y];
		y=idx[x][lg2[d]][y];
		x+=(1<<lg2[d]);
		d-=(1<<lg2[d]);
	}
	return ret;
}

int main(){
	n=readint(); t=readint();
	for(int i=1;i<n;i++){
		m[i]=readint();
		a[i].resize(m[i]);
		for(int j=0;j<m[i];j++){
			a[i][j].fi=readint();
			a[i][j].se=readint();
		}
		sort(a[i].begin(),a[i].end());
	}
	for(int i=1;i<n;i++){
		nxt[i]=vector<int>(m[i],-1);
		for(int j=0;j<18;j++){
			jmp[i][j]=vector<ll>(m[i],0);
			idx[i][j]=vector<int>(m[i],0);
		}
		ok[i]=vector<bool>(m[i],true);
		if(i+1==n) break;
		vector<int> ord(m[i]);
		iota(ord.begin(),ord.end(),0);
		sort(ord.begin(),ord.end(),[&](int x,int y){
			if(a[i][x].se!=a[i][y].se) return a[i][x].se<a[i][y].se;
			else return a[i][x].fi<a[i][y].fi;
		});
		int sz=m[i+1];
		vector<int> mn(sz);
		mn[sz-1]=sz-1;
		for(int j=sz-2;j>=0;j--){
			mn[j]=(a[i+1][j].se<=a[i+1][mn[j+1]].se?j:mn[j+1]);
		}
		int ptr=0;
		for(int j=0;j<m[i];j++){
			while(ptr<m[i+1]&&a[i+1][ptr].fi<a[i][ord[j]].se) ptr++;
			nxt[i][ord[j]]=(ptr==m[i+1]?mn[0]:mn[ptr]);
			jmp[i][0][ord[j]]=(a[i][ord[j]].se<=a[i+1][nxt[i][ord[j]]].fi?a[i+1][nxt[i][ord[j]]].fi-a[i][ord[j]].se:t-a[i][ord[j]].se+a[i+1][nxt[i][ord[j]]].fi)+(a[i+1][nxt[i][ord[j]]].se-a[i+1][nxt[i][ord[j]]].fi);
			idx[i][0][ord[j]]=nxt[i][ord[j]];
		}
		for(int j=0;j<m[i];j++) ord[j]=j;
		sort(ord.begin(),ord.end(),[&](int x,int y){
			if(nxt[i][x]!=nxt[i][y]) return nxt[i][x]<nxt[i][y];
			else return jmp[i][0][x]+a[i][x].se-a[i][x].fi<jmp[i][0][y]+a[i][y].se-a[i][y].fi;
		});
		for(int j=0;j<m[i];j++){
			int ptr=j;
			while(ptr+1<m[i]&&nxt[i][ord[j]]==nxt[i][ord[ptr+1]]) ptr++;
			for(int r=j+1;r<=ptr;r++) ok[i][ord[r]]=false;
			j=ptr;
		}
	}
	for(int i=2;i<=n;i++) lg2[i]=lg2[i>>1]+1;
	for(int k=1;k<18;k++){
		for(int i=1;i+1+(1<<k)<=n;i++){
			for(int j=0;j<m[i];j++){
				jmp[i][k][j]=jmp[i][k-1][j]+jmp[i+(1<<(k-1))][k-1][idx[i][k-1][j]];
				idx[i][k][j]=idx[i+(1<<(k-1))][k-1][idx[i][k-1][j]];
			}
		}
	}
	q=readint();
	for(int i=1;i<=q;i++){
		int l=readint(),r=readint();
		--r;
		qs[l].pb(mp(r,i));
	}
	for(int i=1;i<n;i++){
		dist[i].resize(m[i]);
	}
	for(int i=1;i<=n;i++){
		if(m[i]<=blk){
			for(auto p:qs[i]){
				ans[p.se]=(ll)1e18;
				if(p.fi==i){
					for(int j=0;j<m[i];j++) chkmin(ans[p.se],(ll)a[i][j].se-a[i][j].fi);
				}
			}
			for(int j=0;j<m[i];j++){
				if(!ok[i][j]) continue;
				for(auto p:qs[i]) ans[p.se]=min(ans[p.se],a[i][j].se-a[i][j].fi+lift(i,j,p.fi-i));
			}
			continue;
		}
		int mx=0;
		for(auto p:qs[i]) chkmax(mx,p.fi);
		for(int j=i;j<=mx;j++){
			for(int k=0;k<m[j];k++){
				dist[j][k]=(ll)1e18;
			}
			bst[j]=(ll)1e18;
		}
		priority_queue<pair<ll,pii>> pq;
		for(int j=0;j<m[i];j++){
			dist[i][j]=a[i][j].se-a[i][j].fi;
			pq.push(mp(-dist[i][j],mp(i,j)));
		}
		while(!pq.empty()){
			pair<ll,pii> p=pq.top();
			pq.pop();
			if(dist[p.se.fi][p.se.se]!=-p.fi) continue;
			int x=p.se.fi,y=p.se.se;
			chkmin(bst[x],dist[x][y]);
			if(x>=mx) continue;
			if(dist[x+1][nxt[x][y]]>dist[x][y]+jmp[x][0][y]){
				dist[x+1][nxt[x][y]]=dist[x][y]+jmp[x][0][y];
				pq.push(mp(-dist[x+1][nxt[x][y]],mp(x+1,nxt[x][y])));
			}
		}
		for(auto p:qs[i]) ans[p.se]=bst[p.fi];
	}
	for(int i=1;i<=q;i++) printf("%lld\n",ans[i]);
	return 0;
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 101816 KB Output is correct
2 Correct 64 ms 108272 KB Output is correct
3 Correct 77 ms 111500 KB Output is correct
4 Correct 76 ms 114780 KB Output is correct
5 Correct 81 ms 112468 KB Output is correct
6 Correct 80 ms 114836 KB Output is correct
7 Correct 89 ms 114968 KB Output is correct
8 Correct 63 ms 111584 KB Output is correct
9 Correct 78 ms 114712 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 101816 KB Output is correct
2 Correct 64 ms 108272 KB Output is correct
3 Correct 77 ms 111500 KB Output is correct
4 Correct 76 ms 114780 KB Output is correct
5 Correct 81 ms 112468 KB Output is correct
6 Correct 80 ms 114836 KB Output is correct
7 Correct 89 ms 114968 KB Output is correct
8 Correct 63 ms 111584 KB Output is correct
9 Correct 78 ms 114712 KB Output is correct
10 Correct 23 ms 101724 KB Output is correct
11 Correct 83 ms 111844 KB Output is correct
12 Correct 86 ms 111632 KB Output is correct
13 Correct 86 ms 111740 KB Output is correct
14 Correct 83 ms 111952 KB Output is correct
15 Correct 78 ms 112280 KB Output is correct
16 Correct 59 ms 109352 KB Output is correct
17 Correct 79 ms 113576 KB Output is correct
18 Correct 71 ms 112164 KB Output is correct
19 Correct 71 ms 113492 KB Output is correct
20 Correct 84 ms 112472 KB Output is correct

Subtask #3
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 101816 KB Output is correct
2 Correct 64 ms 108272 KB Output is correct
3 Correct 77 ms 111500 KB Output is correct
4 Correct 76 ms 114780 KB Output is correct
5 Correct 81 ms 112468 KB Output is correct
6 Correct 80 ms 114836 KB Output is correct
7 Correct 89 ms 114968 KB Output is correct
8 Correct 63 ms 111584 KB Output is correct
9 Correct 78 ms 114712 KB Output is correct
10 Correct 449 ms 210916 KB Output is correct
11 Correct 533 ms 241688 KB Output is correct
12 Correct 589 ms 241768 KB Output is correct
13 Correct 531 ms 238964 KB Output is correct
14 Correct 550 ms 241968 KB Output is correct
15 Correct 576 ms 241684 KB Output is correct
16 Correct 415 ms 211020 KB Output is correct
17 Correct 616 ms 242016 KB Output is correct
18 Correct 332 ms 220768 KB Output is correct
19 Correct 353 ms 220304 KB Output is correct
20 Correct 320 ms 220688 KB Output is correct
21 Correct 336 ms 220712 KB Output is correct

Subtask #4
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 101816 KB Output is correct
2 Correct 64 ms 108272 KB Output is correct
3 Correct 77 ms 111500 KB Output is correct
4 Correct 76 ms 114780 KB Output is correct
5 Correct 81 ms 112468 KB Output is correct
6 Correct 80 ms 114836 KB Output is correct
7 Correct 89 ms 114968 KB Output is correct
8 Correct 63 ms 111584 KB Output is correct
9 Correct 78 ms 114712 KB Output is correct
10 Correct 23 ms 101724 KB Output is correct
11 Correct 83 ms 111844 KB Output is correct
12 Correct 86 ms 111632 KB Output is correct
13 Correct 86 ms 111740 KB Output is correct
14 Correct 83 ms 111952 KB Output is correct
15 Correct 78 ms 112280 KB Output is correct
16 Correct 59 ms 109352 KB Output is correct
17 Correct 79 ms 113576 KB Output is correct
18 Correct 71 ms 112164 KB Output is correct
19 Correct 71 ms 113492 KB Output is correct
20 Correct 84 ms 112472 KB Output is correct
21 Correct 449 ms 210916 KB Output is correct
22 Correct 533 ms 241688 KB Output is correct
23 Correct 589 ms 241768 KB Output is correct
24 Correct 531 ms 238964 KB Output is correct
25 Correct 550 ms 241968 KB Output is correct
26 Correct 576 ms 241684 KB Output is correct
27 Correct 415 ms 211020 KB Output is correct
28 Correct 616 ms 242016 KB Output is correct
29 Correct 332 ms 220768 KB Output is correct
30 Correct 353 ms 220304 KB Output is correct
31 Correct 320 ms 220688 KB Output is correct
32 Correct 336 ms 220712 KB Output is correct
33 Correct 325 ms 145824 KB Output is correct
34 Correct 364 ms 145844 KB Output is correct
35 Correct 303 ms 145644 KB Output is correct
36 Correct 294 ms 145644 KB Output is correct
37 Correct 349 ms 157420 KB Output is correct
38 Correct 327 ms 178040 KB Output is correct
39 Correct 394 ms 198920 KB Output is correct
40 Correct 223 ms 144976 KB Output is correct
41 Correct 331 ms 175440 KB Output is correct
42 Correct 413 ms 199248 KB Output is correct
43 Correct 288 ms 158480 KB Output is correct
44 Correct 312 ms 161036 KB Output is correct
45 Correct 265 ms 183120 KB Output is correct
46 Correct 169 ms 148564 KB Output is correct

Subtask #5
36.0 / 36.0

# 결과 실행 시간 메모리 Grader output
1 Correct 22 ms 101724 KB Output is correct
2 Correct 22 ms 101828 KB Output is correct
3 Correct 881 ms 127220 KB Output is correct
4 Correct 880 ms 127316 KB Output is correct
5 Correct 1006 ms 127088 KB Output is correct
6 Correct 1030 ms 127076 KB Output is correct
7 Correct 1033 ms 127068 KB Output is correct
8 Correct 97 ms 127316 KB Output is correct
9 Correct 76 ms 127316 KB Output is correct
10 Correct 63 ms 127560 KB Output is correct
11 Correct 353 ms 220844 KB Output is correct
12 Correct 267 ms 182892 KB Output is correct
13 Correct 171 ms 148504 KB Output is correct
14 Correct 129 ms 140788 KB Output is correct
15 Correct 132 ms 140808 KB Output is correct
16 Correct 125 ms 141028 KB Output is correct
17 Correct 146 ms 140792 KB Output is correct
18 Correct 93 ms 128140 KB Output is correct
19 Correct 136 ms 127512 KB Output is correct
20 Correct 491 ms 193656 KB Output is correct
21 Correct 420 ms 194104 KB Output is correct
22 Correct 399 ms 158768 KB Output is correct
23 Correct 420 ms 158868 KB Output is correct
24 Correct 172 ms 159268 KB Output is correct
25 Correct 153 ms 158848 KB Output is correct
26 Correct 183 ms 159664 KB Output is correct
27 Correct 321 ms 220192 KB Output is correct
28 Correct 343 ms 220816 KB Output is correct
29 Correct 320 ms 220936 KB Output is correct
30 Correct 109 ms 131424 KB Output is correct
31 Correct 86 ms 126820 KB Output is correct
32 Correct 100 ms 128592 KB Output is correct
33 Correct 92 ms 127504 KB Output is correct
34 Correct 97 ms 127328 KB Output is correct

Subtask #6
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 101816 KB Output is correct
2 Correct 64 ms 108272 KB Output is correct
3 Correct 77 ms 111500 KB Output is correct
4 Correct 76 ms 114780 KB Output is correct
5 Correct 81 ms 112468 KB Output is correct
6 Correct 80 ms 114836 KB Output is correct
7 Correct 89 ms 114968 KB Output is correct
8 Correct 63 ms 111584 KB Output is correct
9 Correct 78 ms 114712 KB Output is correct
10 Correct 23 ms 101724 KB Output is correct
11 Correct 83 ms 111844 KB Output is correct
12 Correct 86 ms 111632 KB Output is correct
13 Correct 86 ms 111740 KB Output is correct
14 Correct 83 ms 111952 KB Output is correct
15 Correct 78 ms 112280 KB Output is correct
16 Correct 59 ms 109352 KB Output is correct
17 Correct 79 ms 113576 KB Output is correct
18 Correct 71 ms 112164 KB Output is correct
19 Correct 71 ms 113492 KB Output is correct
20 Correct 84 ms 112472 KB Output is correct
21 Correct 449 ms 210916 KB Output is correct
22 Correct 533 ms 241688 KB Output is correct
23 Correct 589 ms 241768 KB Output is correct
24 Correct 531 ms 238964 KB Output is correct
25 Correct 550 ms 241968 KB Output is correct
26 Correct 576 ms 241684 KB Output is correct
27 Correct 415 ms 211020 KB Output is correct
28 Correct 616 ms 242016 KB Output is correct
29 Correct 332 ms 220768 KB Output is correct
30 Correct 353 ms 220304 KB Output is correct
31 Correct 320 ms 220688 KB Output is correct
32 Correct 336 ms 220712 KB Output is correct
33 Correct 325 ms 145824 KB Output is correct
34 Correct 364 ms 145844 KB Output is correct
35 Correct 303 ms 145644 KB Output is correct
36 Correct 294 ms 145644 KB Output is correct
37 Correct 349 ms 157420 KB Output is correct
38 Correct 327 ms 178040 KB Output is correct
39 Correct 394 ms 198920 KB Output is correct
40 Correct 223 ms 144976 KB Output is correct
41 Correct 331 ms 175440 KB Output is correct
42 Correct 413 ms 199248 KB Output is correct
43 Correct 288 ms 158480 KB Output is correct
44 Correct 312 ms 161036 KB Output is correct
45 Correct 265 ms 183120 KB Output is correct
46 Correct 169 ms 148564 KB Output is correct
47 Correct 22 ms 101724 KB Output is correct
48 Correct 22 ms 101828 KB Output is correct
49 Correct 881 ms 127220 KB Output is correct
50 Correct 880 ms 127316 KB Output is correct
51 Correct 1006 ms 127088 KB Output is correct
52 Correct 1030 ms 127076 KB Output is correct
53 Correct 1033 ms 127068 KB Output is correct
54 Correct 97 ms 127316 KB Output is correct
55 Correct 76 ms 127316 KB Output is correct
56 Correct 63 ms 127560 KB Output is correct
57 Correct 353 ms 220844 KB Output is correct
58 Correct 267 ms 182892 KB Output is correct
59 Correct 171 ms 148504 KB Output is correct
60 Correct 129 ms 140788 KB Output is correct
61 Correct 132 ms 140808 KB Output is correct
62 Correct 125 ms 141028 KB Output is correct
63 Correct 146 ms 140792 KB Output is correct
64 Correct 93 ms 128140 KB Output is correct
65 Correct 136 ms 127512 KB Output is correct
66 Correct 491 ms 193656 KB Output is correct
67 Correct 420 ms 194104 KB Output is correct
68 Correct 399 ms 158768 KB Output is correct
69 Correct 420 ms 158868 KB Output is correct
70 Correct 172 ms 159268 KB Output is correct
71 Correct 153 ms 158848 KB Output is correct
72 Correct 183 ms 159664 KB Output is correct
73 Correct 321 ms 220192 KB Output is correct
74 Correct 343 ms 220816 KB Output is correct
75 Correct 320 ms 220936 KB Output is correct
76 Correct 109 ms 131424 KB Output is correct
77 Correct 86 ms 126820 KB Output is correct
78 Correct 100 ms 128592 KB Output is correct
79 Correct 92 ms 127504 KB Output is correct
80 Correct 97 ms 127328 KB Output is correct
81 Correct 942 ms 135612 KB Output is correct
82 Correct 1047 ms 135608 KB Output is correct
83 Correct 1110 ms 135324 KB Output is correct
84 Correct 952 ms 135336 KB Output is correct
85 Correct 962 ms 135544 KB Output is correct
86 Correct 353 ms 135852 KB Output is correct
87 Correct 105 ms 136452 KB Output is correct
88 Correct 831 ms 136160 KB Output is correct
89 Correct 795 ms 136272 KB Output is correct
90 Correct 303 ms 136528 KB Output is correct
91 Correct 88 ms 134320 KB Output is correct
92 Correct 212 ms 152772 KB Output is correct
93 Correct 223 ms 152520 KB Output is correct
94 Correct 206 ms 152548 KB Output is correct
95 Correct 266 ms 152012 KB Output is correct
96 Correct 186 ms 137164 KB Output is correct
97 Correct 315 ms 136020 KB Output is correct
98 Correct 1211 ms 202480 KB Output is correct
99 Correct 986 ms 203348 KB Output is correct
100 Correct 723 ms 168516 KB Output is correct
101 Correct 684 ms 168696 KB Output is correct
102 Correct 223 ms 169232 KB Output is correct
103 Correct 190 ms 167724 KB Output is correct
104 Correct 229 ms 168256 KB Output is correct
105 Correct 130 ms 139160 KB Output is correct
106 Correct 141 ms 134548 KB Output is correct
107 Correct 171 ms 137736 KB Output is correct
108 Correct 148 ms 136008 KB Output is correct
109 Correct 154 ms 136020 KB Output is correct