oj.uz

답안 #675838

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
675838 2022-12-28T06:38:03 Z guagua0407 Railway Trip 2 (JOI22_ho_t4) C++17
16 / 100
 81 ms 71176 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;
int n,k,m;
node segtree[17][1<<17];

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

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 724 KB Output is correct
2 Correct 8 ms 724 KB Output is correct
3 Correct 6 ms 724 KB Output is correct
4 Correct 7 ms 724 KB Output is correct
5 Correct 8 ms 724 KB Output is correct
6 Correct 5 ms 724 KB Output is correct
7 Correct 6 ms 724 KB Output is correct
8 Correct 6 ms 724 KB Output is correct
9 Correct 6 ms 724 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 6 ms 724 KB Output is correct
12 Correct 7 ms 724 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 724 KB Output is correct
2 Correct 8 ms 724 KB Output is correct
3 Correct 6 ms 724 KB Output is correct
4 Correct 7 ms 724 KB Output is correct
5 Correct 8 ms 724 KB Output is correct
6 Correct 5 ms 724 KB Output is correct
7 Correct 6 ms 724 KB Output is correct
8 Correct 6 ms 724 KB Output is correct
9 Correct 6 ms 724 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 6 ms 724 KB Output is correct
12 Correct 7 ms 724 KB Output is correct
13 Correct 81 ms 1656 KB Output is correct
14 Correct 78 ms 1524 KB Output is correct
15 Correct 47 ms 1524 KB Output is correct
16 Correct 58 ms 1492 KB Output is correct
17 Correct 75 ms 1492 KB Output is correct
18 Correct 39 ms 1492 KB Output is correct
19 Correct 53 ms 1492 KB Output is correct
20 Correct 43 ms 1492 KB Output is correct
21 Correct 36 ms 1492 KB Output is correct
22 Correct 58 ms 1540 KB Output is correct
23 Correct 65 ms 1492 KB Output is correct
24 Correct 73 ms 1524 KB Output is correct

Subtask #3
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 56 ms 71176 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 59 ms 71160 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #5
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 56 ms 71136 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #6
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 724 KB Output is correct
2 Correct 8 ms 724 KB Output is correct
3 Correct 6 ms 724 KB Output is correct
4 Correct 7 ms 724 KB Output is correct
5 Correct 8 ms 724 KB Output is correct
6 Correct 5 ms 724 KB Output is correct
7 Correct 6 ms 724 KB Output is correct
8 Correct 6 ms 724 KB Output is correct
9 Correct 6 ms 724 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 6 ms 724 KB Output is correct
12 Correct 7 ms 724 KB Output is correct
13 Correct 81 ms 1656 KB Output is correct
14 Correct 78 ms 1524 KB Output is correct
15 Correct 47 ms 1524 KB Output is correct
16 Correct 58 ms 1492 KB Output is correct
17 Correct 75 ms 1492 KB Output is correct
18 Correct 39 ms 1492 KB Output is correct
19 Correct 53 ms 1492 KB Output is correct
20 Correct 43 ms 1492 KB Output is correct
21 Correct 36 ms 1492 KB Output is correct
22 Correct 58 ms 1540 KB Output is correct
23 Correct 65 ms 1492 KB Output is correct
24 Correct 73 ms 1524 KB Output is correct
25 Runtime error 56 ms 71176 KB Execution killed with signal 11
26 Halted 0 ms 0 KB -