oj.uz

Submission #762325

# Submission time Handle Problem Language Result Execution time Memory
762325 2023-06-21T10:17:35 Z aihay Sky Walking (IOI19_walk) C++14
24 / 100
 2039 ms 537964 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;
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){
	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]>300)
			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)
			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=mp[{(*j),srts[i].F}];
			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:126:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  126 |   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 47320 KB Output is correct
2 Correct 22 ms 47276 KB Output is correct
3 Correct 21 ms 47280 KB Output is correct
4 Correct 23 ms 47232 KB Output is correct
5 Correct 26 ms 47316 KB Output is correct
6 Correct 24 ms 47360 KB Output is correct
7 Correct 24 ms 47372 KB Output is correct
8 Correct 23 ms 47300 KB Output is correct
9 Correct 24 ms 47268 KB Output is correct
10 Correct 24 ms 47384 KB Output is correct
11 Correct 23 ms 47228 KB Output is correct
12 Correct 23 ms 47308 KB Output is correct
13 Correct 23 ms 47316 KB Output is correct
14 Correct 23 ms 47316 KB Output is correct
15 Correct 22 ms 47296 KB Output is correct
16 Correct 21 ms 47316 KB Output is correct
17 Correct 23 ms 47432 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 47264 KB Output is correct
2 Correct 21 ms 47204 KB Output is correct
3 Correct 1050 ms 135744 KB Output is correct
4 Correct 1458 ms 157280 KB Output is correct
5 Correct 1117 ms 148268 KB Output is correct
6 Correct 994 ms 139564 KB Output is correct
7 Correct 1179 ms 148424 KB Output is correct
8 Correct 1345 ms 158588 KB Output is correct
9 Correct 1243 ms 140420 KB Output is correct
10 Correct 2039 ms 190968 KB Output is correct
11 Correct 664 ms 101888 KB Output is correct
12 Correct 544 ms 98952 KB Output is correct
13 Correct 1798 ms 176856 KB Output is correct
14 Correct 477 ms 101988 KB Output is correct
15 Correct 535 ms 103500 KB Output is correct
16 Correct 569 ms 101776 KB Output is correct
17 Correct 564 ms 96476 KB Output is correct
18 Correct 394 ms 98736 KB Output is correct
19 Correct 36 ms 49888 KB Output is correct
20 Correct 213 ms 74280 KB Output is correct
21 Correct 504 ms 92576 KB Output is correct
22 Correct 532 ms 98984 KB Output is correct
23 Correct 643 ms 111684 KB Output is correct
24 Correct 581 ms 101828 KB Output is correct
25 Correct 528 ms 95572 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 122 ms 58828 KB Output is correct
2 Runtime error 1465 ms 537964 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 122 ms 58828 KB Output is correct
2 Runtime error 1465 ms 537964 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 47320 KB Output is correct
2 Correct 22 ms 47276 KB Output is correct
3 Correct 21 ms 47280 KB Output is correct
4 Correct 23 ms 47232 KB Output is correct
5 Correct 26 ms 47316 KB Output is correct
6 Correct 24 ms 47360 KB Output is correct
7 Correct 24 ms 47372 KB Output is correct
8 Correct 23 ms 47300 KB Output is correct
9 Correct 24 ms 47268 KB Output is correct
10 Correct 24 ms 47384 KB Output is correct
11 Correct 23 ms 47228 KB Output is correct
12 Correct 23 ms 47308 KB Output is correct
13 Correct 23 ms 47316 KB Output is correct
14 Correct 23 ms 47316 KB Output is correct
15 Correct 22 ms 47296 KB Output is correct
16 Correct 21 ms 47316 KB Output is correct
17 Correct 23 ms 47432 KB Output is correct
18 Correct 21 ms 47264 KB Output is correct
19 Correct 21 ms 47204 KB Output is correct
20 Correct 1050 ms 135744 KB Output is correct
21 Correct 1458 ms 157280 KB Output is correct
22 Correct 1117 ms 148268 KB Output is correct
23 Correct 994 ms 139564 KB Output is correct
24 Correct 1179 ms 148424 KB Output is correct
25 Correct 1345 ms 158588 KB Output is correct
26 Correct 1243 ms 140420 KB Output is correct
27 Correct 2039 ms 190968 KB Output is correct
28 Correct 664 ms 101888 KB Output is correct
29 Correct 544 ms 98952 KB Output is correct
30 Correct 1798 ms 176856 KB Output is correct
31 Correct 477 ms 101988 KB Output is correct
32 Correct 535 ms 103500 KB Output is correct
33 Correct 569 ms 101776 KB Output is correct
34 Correct 564 ms 96476 KB Output is correct
35 Correct 394 ms 98736 KB Output is correct
36 Correct 36 ms 49888 KB Output is correct
37 Correct 213 ms 74280 KB Output is correct
38 Correct 504 ms 92576 KB Output is correct
39 Correct 532 ms 98984 KB Output is correct
40 Correct 643 ms 111684 KB Output is correct
41 Correct 581 ms 101828 KB Output is correct
42 Correct 528 ms 95572 KB Output is correct
43 Correct 122 ms 58828 KB Output is correct
44 Runtime error 1465 ms 537964 KB Execution killed with signal 11
45 Halted 0 ms 0 KB -