oj.uz

Submission #762342

# Submission time Handle Problem Language Result Execution time Memory
762342 2023-06-21T10:28:44 Z aihay Sky Walking (IOI19_walk) C++14
10 / 100
 1533 ms 537856 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=clock();
	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]>150)
			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||clock()-tim>1600)
			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 21 ms 47316 KB Output is correct
2 Correct 23 ms 47228 KB Output is correct
3 Correct 21 ms 47212 KB Output is correct
4 Correct 21 ms 47316 KB Output is correct
5 Correct 21 ms 47376 KB Output is correct
6 Correct 21 ms 47364 KB Output is correct
7 Correct 21 ms 47308 KB Output is correct
8 Correct 25 ms 47348 KB Output is correct
9 Correct 20 ms 47316 KB Output is correct
10 Correct 24 ms 47324 KB Output is correct
11 Correct 21 ms 47300 KB Output is correct
12 Correct 21 ms 47316 KB Output is correct
13 Correct 20 ms 47220 KB Output is correct
14 Correct 21 ms 47316 KB Output is correct
15 Correct 20 ms 47316 KB Output is correct
16 Correct 20 ms 47256 KB Output is correct
17 Correct 22 ms 47420 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 47232 KB Output is correct
2 Correct 20 ms 47200 KB Output is correct
3 Correct 1074 ms 135820 KB Output is correct
4 Correct 1533 ms 157204 KB Output is correct
5 Incorrect 1148 ms 143516 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 126 ms 58752 KB Output is correct
2 Runtime error 1513 ms 537856 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 126 ms 58752 KB Output is correct
2 Runtime error 1513 ms 537856 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 47316 KB Output is correct
2 Correct 23 ms 47228 KB Output is correct
3 Correct 21 ms 47212 KB Output is correct
4 Correct 21 ms 47316 KB Output is correct
5 Correct 21 ms 47376 KB Output is correct
6 Correct 21 ms 47364 KB Output is correct
7 Correct 21 ms 47308 KB Output is correct
8 Correct 25 ms 47348 KB Output is correct
9 Correct 20 ms 47316 KB Output is correct
10 Correct 24 ms 47324 KB Output is correct
11 Correct 21 ms 47300 KB Output is correct
12 Correct 21 ms 47316 KB Output is correct
13 Correct 20 ms 47220 KB Output is correct
14 Correct 21 ms 47316 KB Output is correct
15 Correct 20 ms 47316 KB Output is correct
16 Correct 20 ms 47256 KB Output is correct
17 Correct 22 ms 47420 KB Output is correct
18 Correct 21 ms 47232 KB Output is correct
19 Correct 20 ms 47200 KB Output is correct
20 Correct 1074 ms 135820 KB Output is correct
21 Correct 1533 ms 157204 KB Output is correct
22 Incorrect 1148 ms 143516 KB Output isn't correct
23 Halted 0 ms 0 KB -