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Submission #298294

# Submission time Handle Problem Language Result Execution time Memory
298294 2020-09-12T17:00:02 Z shayan_p Sky Walking (IOI19_walk) C++17
24 / 100
 4000 ms 539624 KB 
#include<bits/stdc++.h>
#include "walk.h"

#define F first
#define S second
#define PB push_back
#define sz(s) (int(s.size()))
#define bit(n, k) (((n)>>(k))&1)

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, int> pli;

const int maxn = 13e6 + 10, inf = 2e9;
const ll INF = 2e18;

ll dis[maxn];
bool mark[maxn];
vector<pii> v[maxn];

ll digi(int a, int b){
    fill(dis, dis + maxn, INF);
    priority_queue<pli, vector<pli>, greater<pli> > pq;
    dis[a] = 0;
    pq.push({0, a});
    while(sz(pq)){
	int u = pq.top().S;
	pq.pop();
	if(mark[u])
	    continue;
	mark[u] = 1;
	for(auto [y, c] : v[u]){
	    if(dis[u] + c < dis[y])
		dis[y] = dis[u] + c, pq.push({dis[y], y});
	}
    }
    return dis[b];
}

map<pii, int> mp;
int C = 0;
int up[maxn];

void add_edge(int a, int b, int h){
    assert(mp.count({a, h}));
    assert(mp.count({b, h}));
    int A = mp[{a, h}], B = mp[{b, h}];
    v[A].PB({B, abs(b-a)});
    v[B].PB({A, abs(b-a)});    
}

ll min_distance(vector<int> x, vector<int> h, vector<int> l, vector<int> r, vector<int> y, int src, int snk){
    vector<int> hs = h;
    for(int x : y)
	hs.PB(x);
    sort(hs.begin(), hs.end());
    hs.resize( unique(hs.begin(), hs.end()) - hs.begin() );

    int n = sz(x), m = sz(y);
    vector<int> idsx(n), idsy(m);
    iota(idsx.begin(), idsx.end(), 0);
    iota(idsy.begin(), idsy.end(), 0);

    sort(idsx.begin(), idsx.end(), [&](int i, int j){ return h[i] > h[j]; } );
    sort(idsy.begin(), idsy.end(), [&](int i, int j){ return y[i] > y[j]; } );


    for(int i = 0; i < n; i++){
	up[i] = inf;
    }
    
    auto build = [&](int id, int h){
		     if(mp.count({x[id], h}) == 0){
			 mp[{x[id], h}] = C++;
			 if(up[id] != inf){
			     int A = C-1, B = mp[{x[id], up[id]}];
			     v[A].PB({B, abs(h - up[id])});
			     v[B].PB({A, abs(h - up[id])});			     
			 }
			 up[id] = h;
		     }
		 };
    
    int ptx = 0, pty = 0;
    set<int> ids;
    while(ptx < n || pty < m){
	if(ptx == n || (pty != m && h[idsx[ptx]] < y[idsy[pty]])){
	    auto itl = ids.lower_bound(l[ idsy[pty] ]);
	    auto itr = ids.upper_bound(r[ idsy[pty] ]);
	    int LSTX = -1;
	    for(auto it = itl; it != itr; it++){
		build(*it, y[idsy[pty]]);
		if(LSTX != -1)
		    add_edge(LSTX, x[*it], y[idsy[pty]]);
		LSTX = x[*it];
	    }
	    pty++;
	}
	else{
	    ids.insert(idsx[ptx]);
	    ptx++;
	}	    
    }

    for(int i = 0; i < n; i++){
	build(i, 0);
    }

    ll num = digi(mp[{x[src], 0}], mp[{x[snk], 0}]);
    if(num == INF)
	num = -1;
    return num;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 263 ms 407416 KB Output is correct
2 Correct 263 ms 407544 KB Output is correct
3 Correct 267 ms 407416 KB Output is correct
4 Correct 262 ms 407416 KB Output is correct
5 Correct 264 ms 407544 KB Output is correct
6 Correct 263 ms 407416 KB Output is correct
7 Correct 266 ms 407416 KB Output is correct
8 Correct 270 ms 407400 KB Output is correct
9 Correct 268 ms 407516 KB Output is correct
10 Correct 271 ms 407544 KB Output is correct
11 Correct 263 ms 407420 KB Output is correct
12 Correct 264 ms 407544 KB Output is correct
13 Correct 268 ms 407416 KB Output is correct
14 Correct 274 ms 407416 KB Output is correct
15 Correct 266 ms 407416 KB Output is correct
16 Correct 271 ms 407416 KB Output is correct
17 Correct 266 ms 407544 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 268 ms 407416 KB Output is correct
2 Correct 262 ms 407420 KB Output is correct
3 Correct 2166 ms 490856 KB Output is correct
4 Correct 1989 ms 505568 KB Output is correct
5 Correct 1460 ms 492972 KB Output is correct
6 Correct 1327 ms 484512 KB Output is correct
7 Correct 1453 ms 493168 KB Output is correct
8 Correct 2785 ms 513244 KB Output is correct
9 Correct 1865 ms 491224 KB Output is correct
10 Correct 2908 ms 539624 KB Output is correct
11 Correct 1402 ms 456988 KB Output is correct
12 Correct 1020 ms 449780 KB Output is correct
13 Correct 2280 ms 524532 KB Output is correct
14 Correct 784 ms 448112 KB Output is correct
15 Correct 936 ms 449956 KB Output is correct
16 Correct 787 ms 449884 KB Output is correct
17 Correct 835 ms 448368 KB Output is correct
18 Correct 630 ms 450668 KB Output is correct
19 Correct 282 ms 409596 KB Output is correct
20 Correct 498 ms 428732 KB Output is correct
21 Correct 823 ms 445960 KB Output is correct
22 Correct 875 ms 449768 KB Output is correct
23 Correct 798 ms 458208 KB Output is correct
24 Correct 861 ms 449468 KB Output is correct
25 Correct 990 ms 447908 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 431 ms 417940 KB Output is correct
2 Execution timed out 4118 ms 533188 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 431 ms 417940 KB Output is correct
2 Execution timed out 4118 ms 533188 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 263 ms 407416 KB Output is correct
2 Correct 263 ms 407544 KB Output is correct
3 Correct 267 ms 407416 KB Output is correct
4 Correct 262 ms 407416 KB Output is correct
5 Correct 264 ms 407544 KB Output is correct
6 Correct 263 ms 407416 KB Output is correct
7 Correct 266 ms 407416 KB Output is correct
8 Correct 270 ms 407400 KB Output is correct
9 Correct 268 ms 407516 KB Output is correct
10 Correct 271 ms 407544 KB Output is correct
11 Correct 263 ms 407420 KB Output is correct
12 Correct 264 ms 407544 KB Output is correct
13 Correct 268 ms 407416 KB Output is correct
14 Correct 274 ms 407416 KB Output is correct
15 Correct 266 ms 407416 KB Output is correct
16 Correct 271 ms 407416 KB Output is correct
17 Correct 266 ms 407544 KB Output is correct
18 Correct 268 ms 407416 KB Output is correct
19 Correct 262 ms 407420 KB Output is correct
20 Correct 2166 ms 490856 KB Output is correct
21 Correct 1989 ms 505568 KB Output is correct
22 Correct 1460 ms 492972 KB Output is correct
23 Correct 1327 ms 484512 KB Output is correct
24 Correct 1453 ms 493168 KB Output is correct
25 Correct 2785 ms 513244 KB Output is correct
26 Correct 1865 ms 491224 KB Output is correct
27 Correct 2908 ms 539624 KB Output is correct
28 Correct 1402 ms 456988 KB Output is correct
29 Correct 1020 ms 449780 KB Output is correct
30 Correct 2280 ms 524532 KB Output is correct
31 Correct 784 ms 448112 KB Output is correct
32 Correct 936 ms 449956 KB Output is correct
33 Correct 787 ms 449884 KB Output is correct
34 Correct 835 ms 448368 KB Output is correct
35 Correct 630 ms 450668 KB Output is correct
36 Correct 282 ms 409596 KB Output is correct
37 Correct 498 ms 428732 KB Output is correct
38 Correct 823 ms 445960 KB Output is correct
39 Correct 875 ms 449768 KB Output is correct
40 Correct 798 ms 458208 KB Output is correct
41 Correct 861 ms 449468 KB Output is correct
42 Correct 990 ms 447908 KB Output is correct
43 Correct 431 ms 417940 KB Output is correct
44 Execution timed out 4118 ms 533188 KB Time limit exceeded
45 Halted 0 ms 0 KB -