oj.uz

Submission #762358

# Submission time Handle Problem Language Result Execution time Memory
762358 2023-06-21T10:37:41 Z aihay Sky Walking (IOI19_walk) C++14
10 / 100
 2280 ms 537928 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]>200)
			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 47188 KB Output is correct
2 Correct 23 ms 47236 KB Output is correct
3 Correct 22 ms 47220 KB Output is correct
4 Correct 26 ms 47228 KB Output is correct
5 Correct 26 ms 47364 KB Output is correct
6 Correct 25 ms 47328 KB Output is correct
7 Correct 23 ms 47308 KB Output is correct
8 Correct 23 ms 47316 KB Output is correct
9 Correct 23 ms 47320 KB Output is correct
10 Correct 23 ms 47424 KB Output is correct
11 Correct 25 ms 47316 KB Output is correct
12 Correct 26 ms 47300 KB Output is correct
13 Correct 24 ms 47200 KB Output is correct
14 Correct 23 ms 47320 KB Output is correct
15 Correct 23 ms 47316 KB Output is correct
16 Correct 23 ms 47312 KB Output is correct
17 Correct 28 ms 47444 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 47316 KB Output is correct
2 Correct 22 ms 47280 KB Output is correct
3 Correct 1126 ms 135768 KB Output is correct
4 Correct 1724 ms 157176 KB Output is correct
5 Correct 1229 ms 148176 KB Output is correct
6 Correct 1150 ms 139408 KB Output is correct
7 Correct 1266 ms 148392 KB Output is correct
8 Correct 1671 ms 158592 KB Output is correct
9 Correct 1370 ms 140532 KB Output is correct
10 Incorrect 2280 ms 190408 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 167 ms 58796 KB Output is correct
2 Runtime error 1738 ms 537928 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 167 ms 58796 KB Output is correct
2 Runtime error 1738 ms 537928 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 47188 KB Output is correct
2 Correct 23 ms 47236 KB Output is correct
3 Correct 22 ms 47220 KB Output is correct
4 Correct 26 ms 47228 KB Output is correct
5 Correct 26 ms 47364 KB Output is correct
6 Correct 25 ms 47328 KB Output is correct
7 Correct 23 ms 47308 KB Output is correct
8 Correct 23 ms 47316 KB Output is correct
9 Correct 23 ms 47320 KB Output is correct
10 Correct 23 ms 47424 KB Output is correct
11 Correct 25 ms 47316 KB Output is correct
12 Correct 26 ms 47300 KB Output is correct
13 Correct 24 ms 47200 KB Output is correct
14 Correct 23 ms 47320 KB Output is correct
15 Correct 23 ms 47316 KB Output is correct
16 Correct 23 ms 47312 KB Output is correct
17 Correct 28 ms 47444 KB Output is correct
18 Correct 21 ms 47316 KB Output is correct
19 Correct 22 ms 47280 KB Output is correct
20 Correct 1126 ms 135768 KB Output is correct
21 Correct 1724 ms 157176 KB Output is correct
22 Correct 1229 ms 148176 KB Output is correct
23 Correct 1150 ms 139408 KB Output is correct
24 Correct 1266 ms 148392 KB Output is correct
25 Correct 1671 ms 158592 KB Output is correct
26 Correct 1370 ms 140532 KB Output is correct
27 Incorrect 2280 ms 190408 KB Output isn't correct
28 Halted 0 ms 0 KB -