oj.uz

Submission #762355

# Submission time Handle Problem Language Result Execution time Memory
762355 2023-06-21T10:35:50 Z aihay Sky Walking (IOI19_walk) C++14
10 / 100
 2212 ms 538284 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]||clock()-tim>2000000)
			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>1000000)
			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 24 ms 47316 KB Output is correct
2 Correct 25 ms 47212 KB Output is correct
3 Correct 25 ms 47316 KB Output is correct
4 Correct 24 ms 47316 KB Output is correct
5 Correct 25 ms 47344 KB Output is correct
6 Correct 24 ms 47380 KB Output is correct
7 Correct 26 ms 47300 KB Output is correct
8 Correct 24 ms 47316 KB Output is correct
9 Correct 23 ms 47220 KB Output is correct
10 Correct 25 ms 47316 KB Output is correct
11 Correct 24 ms 47236 KB Output is correct
12 Correct 24 ms 47280 KB Output is correct
13 Correct 24 ms 47316 KB Output is correct
14 Correct 24 ms 47316 KB Output is correct
15 Correct 23 ms 47316 KB Output is correct
16 Correct 24 ms 47292 KB Output is correct
17 Correct 25 ms 47316 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 47316 KB Output is correct
2 Correct 25 ms 47180 KB Output is correct
3 Correct 1114 ms 136072 KB Output is correct
4 Correct 1704 ms 157584 KB Output is correct
5 Correct 1129 ms 148556 KB Output is correct
6 Correct 1016 ms 139784 KB Output is correct
7 Correct 1135 ms 148684 KB Output is correct
8 Correct 1439 ms 159052 KB Output is correct
9 Correct 1280 ms 140932 KB Output is correct
10 Incorrect 2212 ms 191724 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 155 ms 58824 KB Output is correct
2 Runtime error 1521 ms 538284 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 155 ms 58824 KB Output is correct
2 Runtime error 1521 ms 538284 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 24 ms 47316 KB Output is correct
2 Correct 25 ms 47212 KB Output is correct
3 Correct 25 ms 47316 KB Output is correct
4 Correct 24 ms 47316 KB Output is correct
5 Correct 25 ms 47344 KB Output is correct
6 Correct 24 ms 47380 KB Output is correct
7 Correct 26 ms 47300 KB Output is correct
8 Correct 24 ms 47316 KB Output is correct
9 Correct 23 ms 47220 KB Output is correct
10 Correct 25 ms 47316 KB Output is correct
11 Correct 24 ms 47236 KB Output is correct
12 Correct 24 ms 47280 KB Output is correct
13 Correct 24 ms 47316 KB Output is correct
14 Correct 24 ms 47316 KB Output is correct
15 Correct 23 ms 47316 KB Output is correct
16 Correct 24 ms 47292 KB Output is correct
17 Correct 25 ms 47316 KB Output is correct
18 Correct 23 ms 47316 KB Output is correct
19 Correct 25 ms 47180 KB Output is correct
20 Correct 1114 ms 136072 KB Output is correct
21 Correct 1704 ms 157584 KB Output is correct
22 Correct 1129 ms 148556 KB Output is correct
23 Correct 1016 ms 139784 KB Output is correct
24 Correct 1135 ms 148684 KB Output is correct
25 Correct 1439 ms 159052 KB Output is correct
26 Correct 1280 ms 140932 KB Output is correct
27 Incorrect 2212 ms 191724 KB Output isn't correct
28 Halted 0 ms 0 KB -