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Submission #761514

# Submission time Handle Problem Language Result Execution time Memory
761514 2023-06-19T21:47:17 Z aihay Sky Walking (IOI19_walk) C++14
10 / 100
 4000 ms 545296 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];
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()){
		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++){
			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();
}

Compilation message

walk.cpp: In function 'LL dijk()':
walk.cpp:33:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |   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:90:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   90 |   for(int j=1;j<vec[x[i]].size();j++){
      |               ~^~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 117728 KB Output is correct
2 Correct 56 ms 117680 KB Output is correct
3 Correct 56 ms 117720 KB Output is correct
4 Correct 56 ms 117668 KB Output is correct
5 Correct 56 ms 117800 KB Output is correct
6 Correct 59 ms 117708 KB Output is correct
7 Correct 56 ms 117752 KB Output is correct
8 Correct 55 ms 117708 KB Output is correct
9 Correct 55 ms 117708 KB Output is correct
10 Correct 56 ms 117812 KB Output is correct
11 Correct 55 ms 117692 KB Output is correct
12 Correct 55 ms 117724 KB Output is correct
13 Correct 55 ms 117728 KB Output is correct
14 Correct 55 ms 117708 KB Output is correct
15 Correct 55 ms 117700 KB Output is correct
16 Correct 55 ms 117708 KB Output is correct
17 Correct 56 ms 117756 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 54 ms 117656 KB Output is correct
2 Correct 57 ms 117692 KB Output is correct
3 Correct 1369 ms 210712 KB Output is correct
4 Correct 1814 ms 232092 KB Output is correct
5 Correct 1377 ms 218060 KB Output is correct
6 Correct 1652 ms 208560 KB Output is correct
7 Correct 1399 ms 218076 KB Output is correct
8 Correct 1748 ms 234956 KB Output is correct
9 Correct 1496 ms 214348 KB Output is correct
10 Correct 2496 ms 267896 KB Output is correct
11 Correct 821 ms 174220 KB Output is correct
12 Correct 769 ms 169968 KB Output is correct
13 Correct 2234 ms 252972 KB Output is correct
14 Correct 2690 ms 168260 KB Output is correct
15 Correct 1727 ms 169876 KB Output is correct
16 Correct 748 ms 169108 KB Output is correct
17 Correct 714 ms 167372 KB Output is correct
18 Execution timed out 4070 ms 153084 KB Time limit exceeded
19 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 213 ms 131040 KB Output is correct
2 Execution timed out 4081 ms 545296 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 213 ms 131040 KB Output is correct
2 Execution timed out 4081 ms 545296 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 117728 KB Output is correct
2 Correct 56 ms 117680 KB Output is correct
3 Correct 56 ms 117720 KB Output is correct
4 Correct 56 ms 117668 KB Output is correct
5 Correct 56 ms 117800 KB Output is correct
6 Correct 59 ms 117708 KB Output is correct
7 Correct 56 ms 117752 KB Output is correct
8 Correct 55 ms 117708 KB Output is correct
9 Correct 55 ms 117708 KB Output is correct
10 Correct 56 ms 117812 KB Output is correct
11 Correct 55 ms 117692 KB Output is correct
12 Correct 55 ms 117724 KB Output is correct
13 Correct 55 ms 117728 KB Output is correct
14 Correct 55 ms 117708 KB Output is correct
15 Correct 55 ms 117700 KB Output is correct
16 Correct 55 ms 117708 KB Output is correct
17 Correct 56 ms 117756 KB Output is correct
18 Correct 54 ms 117656 KB Output is correct
19 Correct 57 ms 117692 KB Output is correct
20 Correct 1369 ms 210712 KB Output is correct
21 Correct 1814 ms 232092 KB Output is correct
22 Correct 1377 ms 218060 KB Output is correct
23 Correct 1652 ms 208560 KB Output is correct
24 Correct 1399 ms 218076 KB Output is correct
25 Correct 1748 ms 234956 KB Output is correct
26 Correct 1496 ms 214348 KB Output is correct
27 Correct 2496 ms 267896 KB Output is correct
28 Correct 821 ms 174220 KB Output is correct
29 Correct 769 ms 169968 KB Output is correct
30 Correct 2234 ms 252972 KB Output is correct
31 Correct 2690 ms 168260 KB Output is correct
32 Correct 1727 ms 169876 KB Output is correct
33 Correct 748 ms 169108 KB Output is correct
34 Correct 714 ms 167372 KB Output is correct
35 Execution timed out 4070 ms 153084 KB Time limit exceeded
36 Halted 0 ms 0 KB -