oj.uz

Submission #675823

# Submission time Handle Problem Language Result Execution time Memory
675823 2022-12-28T04:33:04 Z guagua0407 Railway Trip 2 (JOI22_ho_t4) C++17
16 / 100
 83 ms 59544 KB 
/*
燒雞
 燒雞
  燒雞    好想進選訓
 燒雞
燒雞
*/
#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end() 
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

struct node{
	int mx=-1, mn=1e5+5;
	int stmx=-1, stmn=1e5+5;
};

const int mxn=1e5+5;
pair<int,int> jump[17][mxn];
int n,k,m;
node segtree[17][100005];

void push(int id,int v){
	segtree[id][v*2].mn=min(segtree[id][v*2].mn,segtree[id][v].stmn);
	segtree[id][v*2+1].mn=min(segtree[id][v*2+1].mn,segtree[id][v].stmn);
	segtree[id][v*2].mx=max(segtree[id][v*2].mx,segtree[id][v].stmx);
	segtree[id][v*2+1].mx=max(segtree[id][v*2+1].mx,segtree[id][v].stmx);
	segtree[id][v*2].stmn=min(segtree[id][v*2].stmn,segtree[id][v].stmn);
	segtree[id][v*2+1].stmn=min(segtree[id][v*2+1].stmn,segtree[id][v].stmn);
	segtree[id][v*2].stmx=max(segtree[id][v*2].stmx,segtree[id][v].stmx);
	segtree[id][v*2+1].stmx=max(segtree[id][v*2+1].stmx,segtree[id][v].stmx);
	segtree[id][v].stmn=1e5+5;
	segtree[id][v].stmx=-1;
}

void init(int id,int l=1,int r=n,int v=1){
	segtree[id][v].mn=l,segtree[id][v].mx=r;
	if(l==r){
		return;
	}
	int mid=(l+r)/2;
	init(id,l,mid,v*2);
	init(id,mid+1,r,v*2+1);
}

void update1(int id,int tl,int tr,int val,int l=1,int r=n,int v=1){
	if(tl>tr){
		return;
	}
	if(tl<=l and r<=tr){
		segtree[id][v].stmx=max(segtree[id][v].stmx,val);
		segtree[id][v].mx=max(segtree[id][v].mx,val);
		return;
	}
	push(id,v);
	int mid=(l+r)/2;
	update1(id,tl,min(mid,tr),val,l,mid,v*2);
	update1(id,max(mid+1,tl),tr,val,mid+1,r,v*2+1);
	segtree[id][v].mx=max(segtree[id][v*2].mx,segtree[id][v*2+1].mx);
	segtree[id][v].mn=min(segtree[id][v*2].mn,segtree[id][v*2+1].mn);
}

void update2(int id,int tl,int tr,int val,int l=1,int r=n,int v=1){
	if(tl>tr){
		return;
	}
	if(tl<=l and r<=tr){
		segtree[id][v].stmn=min(segtree[id][v].stmn,val);
		segtree[id][v].mn=min(segtree[id][v].mn,val);
		return;
	}
	push(id,v);
	int mid=(l+r)/2;
	update2(id,tl,min(mid,tr),val,l,mid,v*2);
	update2(id,max(mid+1,tl),tr,val,mid+1,r,v*2+1);
	segtree[id][v].mn=min(segtree[id][v*2].mn,segtree[id][v*2+1].mn);
	segtree[id][v].mx=max(segtree[id][v*2].mx,segtree[id][v*2+1].mx);
}

pair<int,int> query(int id,int tl,int tr,int l=1,int r=n,int v=1){
	if(tl>tr){
		return {n+1,-1};
	}
	if(tl<=l and r<=tr){
		return {segtree[id][v].mn,segtree[id][v].mx};
	}
	push(id,v);
	int mid=(l+r)/2;
	pair<int,int> x=query(id,tl,min(mid,tr),l,mid,v*2);
	pair<int,int> y=query(id,max(mid+1,tl),tr,mid+1,r,v*2+1);
	return {min(x.f,y.f),max(x.s,y.s)};
}

bool ok(int a,int b,int k){
	pair<int,int> cur={a,a};
	for(int i=0;i<17;i++){
		if(k&(1<<i)){
			cur=query(i,cur.f,cur.s);
		}
	}
	return (cur.f<=b and b<=cur.s);
}

int main() {_
    //setIO("wayne");
	cin>>n>>k;
	cin>>m;
	for(int i=0;i<17;i++){
		init(i);
	}
	for(int i=0;i<m;i++){
		int a,b;
		cin>>a>>b;
		if(a<b){
			int tmp=min(a+k-1,b);
			update1(0,a,tmp,b);
		}
		else{
			int tmp=max(a-k+1,b);
			update2(0,tmp,a,b);
		}
	}
	for(int i=1;i<17;i++){
		for(int j=1;j<=n;j++){
			update1(i,j,j,query(i-1,query(i-1,j,j).f,query(i-1,j,j).s).s);
			update2(i,j,j,query(i-1,query(i-1,j,j).f,query(i-1,j,j).s).f);
		}
	}
	int q;
	cin>>q;
	for(int i=0;i<q;i++){
		int a,b;
		cin>>a>>b;
		//binary search ans
		int l=0,r=n+1;
		while(l<r){
			int mid=(l+r)/2;
			if(ok(a,b,mid)){
				r=mid;
			}
			else{
				l=mid+1;
			}
		}
		cout<<(l==n+1?-1:l)<<'\n';
	}
    return 0;
}
//maybe its multiset not set

Compilation message

Main.cpp: In function 'void setIO(std::string)':
Main.cpp:19:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:20:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 596 KB Output is correct
2 Correct 8 ms 720 KB Output is correct
3 Correct 6 ms 724 KB Output is correct
4 Correct 7 ms 724 KB Output is correct
5 Correct 7 ms 720 KB Output is correct
6 Correct 5 ms 596 KB Output is correct
7 Correct 6 ms 596 KB Output is correct
8 Correct 6 ms 596 KB Output is correct
9 Correct 7 ms 716 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 6 ms 596 KB Output is correct
12 Correct 7 ms 596 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 596 KB Output is correct
2 Correct 8 ms 720 KB Output is correct
3 Correct 6 ms 724 KB Output is correct
4 Correct 7 ms 724 KB Output is correct
5 Correct 7 ms 720 KB Output is correct
6 Correct 5 ms 596 KB Output is correct
7 Correct 6 ms 596 KB Output is correct
8 Correct 6 ms 596 KB Output is correct
9 Correct 7 ms 716 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 6 ms 596 KB Output is correct
12 Correct 7 ms 596 KB Output is correct
13 Correct 83 ms 1612 KB Output is correct
14 Correct 79 ms 1492 KB Output is correct
15 Correct 48 ms 1492 KB Output is correct
16 Correct 61 ms 1520 KB Output is correct
17 Correct 74 ms 1612 KB Output is correct
18 Correct 41 ms 1520 KB Output is correct
19 Correct 54 ms 1492 KB Output is correct
20 Correct 44 ms 1492 KB Output is correct
21 Correct 38 ms 1492 KB Output is correct
22 Correct 64 ms 1520 KB Output is correct
23 Correct 65 ms 1520 KB Output is correct
24 Correct 76 ms 1516 KB Output is correct

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Runtime error 49 ms 59444 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 25.0

# Verdict Execution time Memory Grader output
1 Runtime error 48 ms 59468 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #5
0 / 35.0

# Verdict Execution time Memory Grader output
1 Runtime error 49 ms 59544 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #6
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 596 KB Output is correct
2 Correct 8 ms 720 KB Output is correct
3 Correct 6 ms 724 KB Output is correct
4 Correct 7 ms 724 KB Output is correct
5 Correct 7 ms 720 KB Output is correct
6 Correct 5 ms 596 KB Output is correct
7 Correct 6 ms 596 KB Output is correct
8 Correct 6 ms 596 KB Output is correct
9 Correct 7 ms 716 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 6 ms 596 KB Output is correct
12 Correct 7 ms 596 KB Output is correct
13 Correct 83 ms 1612 KB Output is correct
14 Correct 79 ms 1492 KB Output is correct
15 Correct 48 ms 1492 KB Output is correct
16 Correct 61 ms 1520 KB Output is correct
17 Correct 74 ms 1612 KB Output is correct
18 Correct 41 ms 1520 KB Output is correct
19 Correct 54 ms 1492 KB Output is correct
20 Correct 44 ms 1492 KB Output is correct
21 Correct 38 ms 1492 KB Output is correct
22 Correct 64 ms 1520 KB Output is correct
23 Correct 65 ms 1520 KB Output is correct
24 Correct 76 ms 1516 KB Output is correct
25 Runtime error 49 ms 59444 KB Execution killed with signal 11
26 Halted 0 ms 0 KB -