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Submission #761517

# Submission time Handle Problem Language Result Execution time Memory
761517 2023-06-19T21:50:35 Z aihay Sky Walking (IOI19_walk) C++14
10 / 100
 4000 ms 542812 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;
LL cst[1000010],xx;
vector<int> v[5000010];
map<pair<LL,LL>,int> mp;
pair<LL,LL> inter[5000010];
LL dijk(){
	for(int i=0;i<idxx;i++)
		cst[i]=MAAX;
	priority_queue<pair<LL,int>> pq;
	pq.push({0,mp[{x[s],0}]});
	while(pq.size()&&xx<5e8){
		xx++;
		LL cost=-pq.top().F;
		int idx=pq.top().S;
		pq.pop();
		if(cost>cst[idx])
			continue;
		cst[idx]=cost;
		if(idx==mp[{x[g],0}])
			break;
		for(int i=0;i<v[idx].size();i++){
			xx++;
			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[mp[{x[g],0}]]==MAAX)
		cst[mp[{x[g],0}]]=-1;
	return cst[mp[{x[g],0}]];
}
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);
	}
	mp[{x[s],0}]=idxx++;
	inter[0]={x[s],0};
	mp[{x[g],0}]=idxx++;
	inter[1]={x[g],0};
	for(int i=0;i<n;i++){
		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];
		int lst=-1;
		for(int j=l[i];j<=r[i];j++){
			if(h[j]<y[i])
				continue;
			if(mp[{x[j],y[i]}]==0){
				mp[{x[j],y[i]}]=idxx++;
				inter[idxx-1]={x[j],y[i]};
			}
			if(~lst){
				v[mp[{x[lst],y[i]}]].PB(mp[{x[j],y[i]}]);
				v[mp[{x[j],y[i]}]].PB(mp[{x[lst],y[i]}]);
			}
			vec[x[j]].PB(y[i]);
			lst=j;
		}
	}
	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();
}
int N,M,S,G;
vector<int> X,H,L,R,Y;

Compilation message

walk.cpp: In function 'LL dijk()':
walk.cpp:34:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |   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:92:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   92 |   for(int j=1;j<vec[x[i]].size();j++){
      |               ~^~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 54 ms 117676 KB Output is correct
2 Correct 57 ms 117704 KB Output is correct
3 Correct 54 ms 117620 KB Output is correct
4 Correct 55 ms 117720 KB Output is correct
5 Correct 55 ms 117708 KB Output is correct
6 Correct 57 ms 117756 KB Output is correct
7 Correct 54 ms 117720 KB Output is correct
8 Correct 62 ms 117752 KB Output is correct
9 Correct 53 ms 117748 KB Output is correct
10 Correct 57 ms 117848 KB Output is correct
11 Correct 55 ms 117760 KB Output is correct
12 Correct 55 ms 117720 KB Output is correct
13 Correct 55 ms 117676 KB Output is correct
14 Correct 55 ms 117704 KB Output is correct
15 Correct 55 ms 117684 KB Output is correct
16 Correct 55 ms 117668 KB Output is correct
17 Correct 56 ms 117856 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 54 ms 117708 KB Output is correct
2 Correct 54 ms 117632 KB Output is correct
3 Correct 1376 ms 210456 KB Output is correct
4 Correct 1872 ms 231960 KB Output is correct
5 Correct 1407 ms 217852 KB Output is correct
6 Correct 1891 ms 208416 KB Output is correct
7 Correct 1365 ms 217864 KB Output is correct
8 Correct 1811 ms 234744 KB Output is correct
9 Correct 1719 ms 214172 KB Output is correct
10 Correct 2661 ms 267796 KB Output is correct
11 Correct 976 ms 173884 KB Output is correct
12 Correct 722 ms 169796 KB Output is correct
13 Correct 2267 ms 252768 KB Output is correct
14 Execution timed out 4027 ms 168152 KB Time limit exceeded
15 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 223 ms 130932 KB Output is correct
2 Execution timed out 4123 ms 542812 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 223 ms 130932 KB Output is correct
2 Execution timed out 4123 ms 542812 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 54 ms 117676 KB Output is correct
2 Correct 57 ms 117704 KB Output is correct
3 Correct 54 ms 117620 KB Output is correct
4 Correct 55 ms 117720 KB Output is correct
5 Correct 55 ms 117708 KB Output is correct
6 Correct 57 ms 117756 KB Output is correct
7 Correct 54 ms 117720 KB Output is correct
8 Correct 62 ms 117752 KB Output is correct
9 Correct 53 ms 117748 KB Output is correct
10 Correct 57 ms 117848 KB Output is correct
11 Correct 55 ms 117760 KB Output is correct
12 Correct 55 ms 117720 KB Output is correct
13 Correct 55 ms 117676 KB Output is correct
14 Correct 55 ms 117704 KB Output is correct
15 Correct 55 ms 117684 KB Output is correct
16 Correct 55 ms 117668 KB Output is correct
17 Correct 56 ms 117856 KB Output is correct
18 Correct 54 ms 117708 KB Output is correct
19 Correct 54 ms 117632 KB Output is correct
20 Correct 1376 ms 210456 KB Output is correct
21 Correct 1872 ms 231960 KB Output is correct
22 Correct 1407 ms 217852 KB Output is correct
23 Correct 1891 ms 208416 KB Output is correct
24 Correct 1365 ms 217864 KB Output is correct
25 Correct 1811 ms 234744 KB Output is correct
26 Correct 1719 ms 214172 KB Output is correct
27 Correct 2661 ms 267796 KB Output is correct
28 Correct 976 ms 173884 KB Output is correct
29 Correct 722 ms 169796 KB Output is correct
30 Correct 2267 ms 252768 KB Output is correct
31 Execution timed out 4027 ms 168152 KB Time limit exceeded
32 Halted 0 ms 0 KB -