oj.uz

Submission #1071488

# Submission time Handle Problem Language Result Execution time Memory
1071488 2024-08-23T07:46:13 Z pcc Sky Walking (IOI19_walk) C++17
10 / 100
 4000 ms 1048576 KB 
#include "walk.h"
#include <bits/stdc++.h>
using namespace std;
#define _all(T) T.begin(),T.end()
#define ll long long
#define pii pair<int,int>
#define fs first
#define sc second
#define pll pair<ll,ll>

const int mxn = 2e5+10;
const ll inf = 1e18;

vector<pii> paths[mxn];
vector<int> all;
map<pii,int> mp;
ll dist[mxn];
int N;

namespace DIJKSTRA{
	priority_queue<pll,vector<pll>,greater<pll>> pq;
	bitset<mxn> vis;
	void GO(){
		vis.reset();
		for(int i = 0;i<mp.size();i++){
			pq.push(pll(dist[i],i));
		}
		while(!pq.empty()){
			auto [d,now] = pq.top();
			pq.pop();
			if(vis[now])continue;
			//cerr<<now<<":"<<d<<endl;
			vis[now] = true;
			for(auto [nxt,w]:paths[now]){
				if(vis[nxt])continue;
				assert(w>=0);
				if(d+w<dist[nxt]){
					dist[nxt] = d+w;
					pq.push(pll(d+w,nxt));
				}
			}
		}
		return;
	}
}

long long min_distance(std::vector<int32_t> x, std::vector<int32_t> H, std::vector<int32_t> l, std::vector<int32_t> r, std::vector<int32_t> y, int32_t st, int32_t ed) {
	all.push_back(0);
	N = x.size();
	for(auto &i:H)all.push_back(i);
	for(auto &i:y)all.push_back(i);
	sort(_all(all));
	all.resize(unique(_all(all))-all.begin());
	for(int i = 0;i<N;i++){
		for(int j = 0;j<all.size();j++)mp[pii(i,j)] = mp.size();
	}
	assert(mp.size()<mxn);

	/*
	for(auto &i:mp){
		cerr<<i.fs.fs<<','<<all[i.fs.sc]<<":"<<i.sc<<endl;
	}
	*/

	for(int i = 0;i<N;i++){
		for(int j = 0;j<all.size();j++){
			for(int k = j+1;k<all.size();k++){
				if(H[i]<all[k])break;
				int a = mp[pii(i,j)],b = mp[pii(i,k)];
				paths[a].push_back(pii(b,abs(all[j]-all[k])));
				paths[b].push_back(pii(a,abs(all[j]-all[k])));
			}
		}
	}

	for(int i = 0;i<l.size();i++){
		int s = l[i],e = r[i],h = y[i];
		h = lower_bound(_all(all),h)-all.begin();
		assert(all[h] == y[i]);
		pii pre = pii(s,h);
		for(int j = s+1;j<=e;j++){
			if(H[j]<all[h])continue;
			pii now = pii(j,h);
			int a = mp[pre],b = mp[now];
			assert(x[now.fs]>=x[pre.fs]);
			paths[a].push_back(pii(b,x[now.fs]-x[pre.fs]));
			paths[b].push_back(pii(a,x[now.fs]-x[pre.fs]));
			pre = now;
		}
	}
	fill(dist,dist+mxn,inf);
	dist[mp[pii(st,0)]] = 0;
	//cerr<<mp[pii(st,0)]<<','<<mp[pii(ed,0)]<<endl;
	DIJKSTRA::GO();
	ll ans =  dist[mp[pii(ed,0)]];
	if(ans>=inf)return -1;
	else return ans;
}

Compilation message

walk.cpp: In function 'void DIJKSTRA::GO()':
walk.cpp:25:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::map<std::pair<int, int>, int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |   for(int i = 0;i<mp.size();i++){
      |                 ~^~~~~~~~~~
walk.cpp: In function 'long long int min_distance(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, int32_t, int32_t)':
walk.cpp:55:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |   for(int j = 0;j<all.size();j++)mp[pii(i,j)] = mp.size();
      |                 ~^~~~~~~~~~~
walk.cpp:66:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |   for(int j = 0;j<all.size();j++){
      |                 ~^~~~~~~~~~~
walk.cpp:67:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |    for(int k = j+1;k<all.size();k++){
      |                    ~^~~~~~~~~~~
walk.cpp:76:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |  for(int i = 0;i<l.size();i++){
      |                ~^~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 3 ms 6748 KB Output is correct
4 Correct 3 ms 7004 KB Output is correct
5 Correct 18 ms 10328 KB Output is correct
6 Correct 4 ms 7000 KB Output is correct
7 Correct 8 ms 8792 KB Output is correct
8 Correct 3 ms 7004 KB Output is correct
9 Correct 3 ms 6868 KB Output is correct
10 Correct 23 ms 10328 KB Output is correct
11 Correct 6 ms 7768 KB Output is correct
12 Correct 5 ms 7516 KB Output is correct
13 Correct 9 ms 7772 KB Output is correct
14 Correct 6 ms 7516 KB Output is correct
15 Correct 4 ms 7000 KB Output is correct
16 Correct 15 ms 10076 KB Output is correct
17 Correct 18 ms 10200 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6492 KB Output is correct
2 Correct 2 ms 6492 KB Output is correct
3 Execution timed out 4067 ms 1019244 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 111 ms 20264 KB Output is correct
2 Runtime error 3912 ms 1048576 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 111 ms 20264 KB Output is correct
2 Runtime error 3912 ms 1048576 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 3 ms 6748 KB Output is correct
4 Correct 3 ms 7004 KB Output is correct
5 Correct 18 ms 10328 KB Output is correct
6 Correct 4 ms 7000 KB Output is correct
7 Correct 8 ms 8792 KB Output is correct
8 Correct 3 ms 7004 KB Output is correct
9 Correct 3 ms 6868 KB Output is correct
10 Correct 23 ms 10328 KB Output is correct
11 Correct 6 ms 7768 KB Output is correct
12 Correct 5 ms 7516 KB Output is correct
13 Correct 9 ms 7772 KB Output is correct
14 Correct 6 ms 7516 KB Output is correct
15 Correct 4 ms 7000 KB Output is correct
16 Correct 15 ms 10076 KB Output is correct
17 Correct 18 ms 10200 KB Output is correct
18 Correct 2 ms 6492 KB Output is correct
19 Correct 2 ms 6492 KB Output is correct
20 Execution timed out 4067 ms 1019244 KB Time limit exceeded
21 Halted 0 ms 0 KB -