oj.uz

Submission #762334

# Submission time Handle Problem Language Result Execution time Memory
762334 2023-06-21T10:24:52 Z aihay Sky Walking (IOI19_walk) C++14
10 / 100
 2095 ms 213992 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long LL;
#define F first
#define S second
#define PB push_back
#define FR(i,a,b) for(int i=(a);i<(b);i++)
#define FOR(i,n) FR(i,0,n)
#define SZ(x) int(x.size())
const LL MAAX=1e18;
const int MOD=1e9+7;
const int MAX=1e9;

int n,m,s,g,x[100010],h[100010],l[100010],r[100010],y[100010],idxx,tim;
pair<int,int> srtb[100010];
pair<int,pair<int,int>> srts[100010];
LL cst[1000010];
vector<int> v[2000010];
map<pair<int,int>,int> mp;
pair<int,int> inter[2000010];
LL dijk(){
	for(int i=0;i<idxx;i++)
		cst[i]=MAAX;
	priority_queue<pair<LL,int>> pq;
	pq.push({0,1});
	while(pq.size()){
		LL cost=-pq.top().F;
		int idx=pq.top().S;
		pq.pop();
		if(cost>cst[idx])
			continue;
		cst[idx]=cost;
		if(idx==2)
			break;
		for(int i=0;i<v[idx].size();i++){
			int x1=inter[idx].F,x2=inter[v[idx][i]].F;
			int y1=inter[idx].S,y2=inter[v[idx][i]].S;
			LL ncst=cost+abs(x2-x1)+abs(y2-y1);
			int nidx=v[idx][i];
			if(ncst<cst[nidx]){
				cst[nidx]=ncst;
				pq.push({-ncst,nidx});
			}
		}
	}
	if(cst[2]==MAAX)
		cst[2]=-1;
	return cst[2];
}
map<int,vector<int>> vec;
LL min_distance(vector<int> X,vector<int> H,vector<int> L,vector<int> R,vector<int> Y,int S,int G){
	tim=time(0);
	n=X.size();
	m=L.size();
	s=S,g=G;
	for(int i=0;i<n;i++){
		x[i]=X[i];
		h[i]=H[i];
		vec[x[i]].PB(0);
		srtb[i]={-h[i],x[i]};
	}
	sort(srtb,srtb+n);
	idxx++;
	mp[{x[s],0}]=idxx++;
	inter[1]={x[s],0};
	mp[{x[g],0}]=idxx++;
	inter[2]={x[g],0};
	for(int i=0;i<n;i++){
		srtb[i].F*=-1;
		if(mp[{x[i],0}]==0){
			mp[{x[i],0}]=idxx++;
			inter[idxx-1]={x[i],0};
		}
	}
	for(int i=0;i<m;i++){
		l[i]=L[i];
		r[i]=R[i];
		y[i]=Y[i];
		if(r[i]-l[i]>50)
			srts[i]={-y[i],{x[l[i]],x[r[i]]}};
		else{
			srts[i]={1,{-1,-1}};
			int lst=-1;
			for(int j=l[i];j<=r[i];j++){
				if(h[j]<y[i])
					continue;
				int xx=mp[{x[j],y[i]}];
				if(xx==0){
					mp[{x[j],y[i]}]=xx=idxx++;
					inter[idxx-1]={x[j],y[i]};
					vec[x[j]].PB(y[i]);
				}
				if(~lst){
					v[lst].PB(xx);
					v[xx].PB(lst);
				}
				lst=xx;
			}
		}
	}
	sort(srts,srts+m);
	set<int> curst;
	int idx=0;
	for(int i=0;i<m;i++){
		if(srts[i].F==1||time(0)-tim>0)
			break;
		srts[i].F=-srts[i].F;
		while(idx<n&&srtb[idx].F>=srts[i].F)
			curst.insert(srtb[idx++].S);
		int lst=-1;
		for(set<int>::iterator j=curst.lower_bound(srts[i].S.F);j!=curst.end()&&(*j)<=srts[i].S.S;j++){
			int xx=0;
			if(xx==0){
				mp[{(*j),srts[i].F}]=xx=idxx++;
				inter[idxx-1]={(*j),srts[i].F};
				vec[(*j)].PB(srts[i].F);
			}
			if(~lst){
				v[lst].PB(xx);
				v[xx].PB(lst);
			}
			lst=xx;
		}
	}
	for(int i=0;i<n;i++){
		sort(vec[x[i]].begin(),vec[x[i]].end());
		for(int j=1;j<vec[x[i]].size();j++){
			v[mp[{x[i],vec[x[i]][j]}]].PB(mp[{x[i],vec[x[i]][j-1]}]);
			v[mp[{x[i],vec[x[i]][j-1]}]].PB(mp[{x[i],vec[x[i]][j]}]);
		}
	}
	return dijk();
}

Compilation message

walk.cpp: In function 'LL dijk()':
walk.cpp:35:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |   for(int i=0;i<v[idx].size();i++){
      |               ~^~~~~~~~~~~~~~
walk.cpp: In function 'LL min_distance(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, int, int)':
walk.cpp:127:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  127 |   for(int j=1;j<vec[x[i]].size();j++){
      |               ~^~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 47188 KB Output is correct
2 Correct 25 ms 47244 KB Output is correct
3 Correct 22 ms 47316 KB Output is correct
4 Correct 22 ms 47316 KB Output is correct
5 Correct 23 ms 47288 KB Output is correct
6 Correct 23 ms 47284 KB Output is correct
7 Correct 22 ms 47316 KB Output is correct
8 Correct 23 ms 47392 KB Output is correct
9 Correct 26 ms 47424 KB Output is correct
10 Correct 23 ms 47432 KB Output is correct
11 Correct 22 ms 47224 KB Output is correct
12 Correct 23 ms 47296 KB Output is correct
13 Correct 22 ms 47292 KB Output is correct
14 Correct 22 ms 47260 KB Output is correct
15 Correct 23 ms 47216 KB Output is correct
16 Correct 21 ms 47236 KB Output is correct
17 Correct 22 ms 47436 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 47316 KB Output is correct
2 Correct 20 ms 47316 KB Output is correct
3 Correct 1125 ms 135836 KB Output is correct
4 Correct 1600 ms 157192 KB Output is correct
5 Incorrect 1141 ms 143480 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 121 ms 58820 KB Output is correct
2 Incorrect 2095 ms 213992 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 121 ms 58820 KB Output is correct
2 Incorrect 2095 ms 213992 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 47188 KB Output is correct
2 Correct 25 ms 47244 KB Output is correct
3 Correct 22 ms 47316 KB Output is correct
4 Correct 22 ms 47316 KB Output is correct
5 Correct 23 ms 47288 KB Output is correct
6 Correct 23 ms 47284 KB Output is correct
7 Correct 22 ms 47316 KB Output is correct
8 Correct 23 ms 47392 KB Output is correct
9 Correct 26 ms 47424 KB Output is correct
10 Correct 23 ms 47432 KB Output is correct
11 Correct 22 ms 47224 KB Output is correct
12 Correct 23 ms 47296 KB Output is correct
13 Correct 22 ms 47292 KB Output is correct
14 Correct 22 ms 47260 KB Output is correct
15 Correct 23 ms 47216 KB Output is correct
16 Correct 21 ms 47236 KB Output is correct
17 Correct 22 ms 47436 KB Output is correct
18 Correct 20 ms 47316 KB Output is correct
19 Correct 20 ms 47316 KB Output is correct
20 Correct 1125 ms 135836 KB Output is correct
21 Correct 1600 ms 157192 KB Output is correct
22 Incorrect 1141 ms 143480 KB Output isn't correct
23 Halted 0 ms 0 KB -