oj.uz

답안 #1048838

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1048838 2024-08-08T09:45:38 Z mychecksedad Sky Walking (IOI19_walk) C++17
10 / 100
 233 ms 131668 KB 
#include "walk.h"
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define pb push_back
#define vi vector<int>
#define ff first
#define ss second
#define all(x) x.begin(),x.end()
const int N = 2e5+100, K = 20;

int n, m;
map<pair<int, int>, int> node;
vector<pair<int,int>> G[N];
vector<int> F[N];
vector<pair<int, ll>> g[N];
int rmq[N][K];
int get(int l, int r){
	int k = log2(r-l+1);
	return max(rmq[l][k],rmq[r-(1<<k)+1][k]);
}
long long min_distance(std::vector<int> x, std::vector<int> h, std::vector<int> l, std::vector<int> r, std::vector<int> y, int s, int gg) {
	n = x.size();
	m = l.size();
	for(int i = 0; i < m; ++i){
		int u = l[i], v = r[i], L = y[i];
		F[u].pb(L);
		F[v].pb(L);
		G[u].pb({v, L});
		G[v].pb({u, L});
	}

	for(int i = 1; i <= n; ++i) rmq[i][0] = h[i - 1];
	for(int j = 1; j < K ;++j){
		for(int i = 1; i + (1<<j) <= n+1; ++i){
			rmq[i][j] = max(rmq[i][j - 1], rmq[i + (1<<(j-1))][j-1]);
		}
	}

	int co = 0;
	for(int i = 0; i < n; ++i){
		for(auto U: G[i]){
			int u = U.ff; ll w = U.ss;
			if(u > i){
				int last = i;
				while(last < u){
					int l = last + 2, r = n, p = n + 1;
					while(l <= r){
						int mid = l+r>>1;
						if(get(last + 2, mid) >= w){
							p = mid;
							r = mid - 1;
						}else{
							l = mid + 1;
						}
					}
					--p;
					if(p == u) break;
					if(h[p] >= w){
						node[{p, w}] = co++;
						F[p].pb(w);
					}
					last = p;
				}
				
			}
		}
	}
	for(int i = 0; i < n; ++i){
		F[i].pb(0);
		F[i].pb(h[i]);
		sort(all(F[i]));
		F[i].erase(unique(all(F[i])), F[i].end());
		for(int p: F[i]){
			// cout << i << ' ' <<p << '\n';
			node[{i, p}] = co++;
		}
		for(int j = 0; j + 1 < F[i].size(); ++j){
			// cout << F[i][j] << ' ';
			g[node[{i, F[i][j]}]].pb({node[{i, F[i][j + 1]}], F[i][j + 1] - F[i][j]});
			g[node[{i, F[i][j + 1]}]].pb({node[{i, F[i][j]}], F[i][j + 1] - F[i][j]});
		}
		// cout << '\n';
	}
	// cout << "\n";
	for(int i = 0; i < n; ++i){
		for(auto U: G[i]){
			int u = U.ff; ll w = U.ss;
			if(u > i){
				int last = i;
				for(int j = i; j <= u; ++j){
					if(h[j] >= w){
						g[node[{last, w}]].pb({node[{j, w}], abs(x[j]-x[last])});
						g[node[{j, w}]].pb({node[{last, w}], abs(x[j]-x[last])});
						last = j;
					}
				}
			}
		}
	}
	if(n>50) assert(false);
	vector<ll> dist(co, 1e15*1ll);
	vector<bool> vis(co);
	priority_queue<pair<ll, int>> Q;
	Q.push({0, node[{s, 0}]});
	dist[node[{s, 0}]] = 0;
	while(!Q.empty()){
		int v = Q.top().ss; Q.pop();
		if(vis[v]) continue;
		// cout  << v << ' ' << dist[v] << '\n';
		vis[v] = 1;
		for(auto U: g[v]){
			int u = U.ff;
			ll w= U.ss;
			if(dist[u] > dist[v] + w){
				dist[u] = dist[v] + w;;
				Q.push({-dist[u], u});
			}
		}
	}
	ll D = dist[node[{gg, 0}]];
	if(D == 1e15*1ll) return -1;
	// cout << node[{gg,0}] << ' ';
	return D;
}

Compilation message

walk.cpp: In function 'long long int min_distance(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, int, int)':
walk.cpp:49:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   49 |       int mid = l+r>>1;
      |                 ~^~
walk.cpp:78:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   78 |   for(int j = 0; j + 1 < F[i].size(); ++j){
      |                  ~~~~~~^~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 15452 KB Output is correct
2 Correct 2 ms 15452 KB Output is correct
3 Correct 2 ms 15452 KB Output is correct
4 Correct 2 ms 15452 KB Output is correct
5 Correct 3 ms 15708 KB Output is correct
6 Correct 2 ms 15708 KB Output is correct
7 Correct 2 ms 15796 KB Output is correct
8 Correct 2 ms 15708 KB Output is correct
9 Correct 2 ms 15708 KB Output is correct
10 Correct 3 ms 15708 KB Output is correct
11 Correct 2 ms 15708 KB Output is correct
12 Correct 2 ms 15708 KB Output is correct
13 Correct 2 ms 15708 KB Output is correct
14 Correct 3 ms 15708 KB Output is correct
15 Correct 2 ms 15452 KB Output is correct
16 Correct 2 ms 15704 KB Output is correct
17 Correct 5 ms 15704 KB Output is correct

Subtask #2
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 15452 KB Output is correct
2 Correct 2 ms 15452 KB Output is correct
3 Runtime error 233 ms 131668 KB Execution killed with signal 11
4 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 89 ms 68944 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 89 ms 68944 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 15452 KB Output is correct
2 Correct 2 ms 15452 KB Output is correct
3 Correct 2 ms 15452 KB Output is correct
4 Correct 2 ms 15452 KB Output is correct
5 Correct 3 ms 15708 KB Output is correct
6 Correct 2 ms 15708 KB Output is correct
7 Correct 2 ms 15796 KB Output is correct
8 Correct 2 ms 15708 KB Output is correct
9 Correct 2 ms 15708 KB Output is correct
10 Correct 3 ms 15708 KB Output is correct
11 Correct 2 ms 15708 KB Output is correct
12 Correct 2 ms 15708 KB Output is correct
13 Correct 2 ms 15708 KB Output is correct
14 Correct 3 ms 15708 KB Output is correct
15 Correct 2 ms 15452 KB Output is correct
16 Correct 2 ms 15704 KB Output is correct
17 Correct 5 ms 15704 KB Output is correct
18 Correct 3 ms 15452 KB Output is correct
19 Correct 2 ms 15452 KB Output is correct
20 Runtime error 233 ms 131668 KB Execution killed with signal 11
21 Halted 0 ms 0 KB -