oj.uz

Submission #1021238

# Submission time Handle Problem Language Result Execution time Memory
1021238 2024-07-12T16:12:49 Z c2zi6 Sky Walking (IOI19_walk) C++14
24 / 100
 4000 ms 509852 KB 
#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define replr(i, a, b) for (int i = int(a); i <= int(b); ++i)
#define reprl(i, a, b) for (int i = int(a); i >= int(b); --i)
#define rep(i, n) for (int i = 0; i < int(n); ++i)
#define mkp(a, b) make_pair(a, b)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef vector<int> VI;
typedef vector<PII> VPI;
typedef vector<VI> VVI;
typedef vector<VVI> VVVI;
typedef vector<VPI> VVPI;
typedef pair<ll, ll> PLL;
typedef vector<ll> VL;
typedef vector<PLL> VPL;
typedef vector<VL> VVL;
typedef vector<VVL> VVVL;
typedef vector<VPL> VVPL;
template<class T> T setmax(T& a, T b) {if (a < b) return a = b; return a;}
template<class T> T setmin(T& a, T b) {if (a < b) return a; return a = b;}
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template<class T>
using indset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#include "walk.h"

struct BRIDGE {
    int l, r, y;
};
struct BUILDING {
    int x, h;
};
struct BUILDINGCOMPORATOR {
    bool operator()(const BUILDING& a, const BUILDING& b) const {
        return mkp(a.x, a.h) < mkp(b.x, b.h);
    }
};

ll min_distance(VI X, VI H, VI L, VI R, VI Y, int S, int T) {
    vector<BUILDING> buildings(X.size());
    rep(i, X.size()) buildings[i] = {X[i], H[i]};
    sort(all(buildings), [](const BUILDING& a, const BUILDING& b){return a.h > b.h;});
    vector<BRIDGE> bridges(L.size());
    rep(i, L.size()) bridges[i] = {X[L[i]], X[R[i]], Y[i]};
    sort(all(bridges), [](const BRIDGE& a, const BRIDGE& b){return a.y > b.y;});
    map<PII, int> ind;
    VPI point;
    VVPI gp;
    auto addvertex = [&](int x, int y) {
        if (ind.count({x, y})) return;
        ind[{x, y}] = gp.size();
        point.pb({x, y});
        gp.pb(VPI());
    };
    addvertex(X[S], 0);
    addvertex(X[T], 0);
    {/* horizontal edges */
        set<int> st;
        for (int j = 0, i = 0; i < bridges.size(); i++) {
            auto&[l, r, y] = bridges[i];
            while (j < buildings.size() && buildings[j].h >= y) st.insert(buildings[j++].x);
            VI xs;
            for (auto it = st.lower_bound(l); it != st.end() && *it <= r; it++) xs.pb(*it);
            for (int x : xs) addvertex(x, y);
            rep(i, xs.size()-1) {
                int u = ind[{xs[i], y}];
                int v = ind[{xs[i+1], y}];
                int w = xs[i+1]-xs[i];
                gp[u].pb({v, w});
                gp[v].pb({u, w});
            }
        }
    }
    {/* vertical edges */
        VPI pts = point;
        sort(all(pts));
        rep(i, pts.size()-1) {
            if (pts[i].ff != pts[i+1].ff) continue;
            int u = ind[pts[i]];
            int v = ind[pts[i+1]];
            int w = pts[i+1].ss - pts[i].ss;
            gp[u].pb({v, w});
            gp[v].pb({u, w});
        }
    }
    int n = gp.size();
    priority_queue<PLL> pq;
    VL dist(n, 1e18);
    VI vis(n);
    pq.push({0, 0});
    dist[0] = 0;
    while (pq.size()) {
        int u = pq.top().ss;
        pq.pop();
        if (vis[u]) continue;
        vis[u] = true;
        for (auto[v, w] : gp[u]) {
            if (dist[u] + w < dist[v]) {
                dist[v] = dist[u] + w;
                pq.push({-dist[v], v});
            }
        }
    }
    if (dist[1] == 1e18) return -1;
	return dist[1];
}

Compilation message

walk.cpp: In function 'll min_distance(VI, VI, VI, VI, VI, int, int)':
walk.cpp:66:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<BRIDGE>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |         for (int j = 0, i = 0; i < bridges.size(); i++) {
      |                                ~~^~~~~~~~~~~~~~~~
walk.cpp:67:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   67 |             auto&[l, r, y] = bridges[i];
      |                  ^
walk.cpp:68:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<BUILDING>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |             while (j < buildings.size() && buildings[j].h >= y) st.insert(buildings[j++].x);
      |                    ~~^~~~~~~~~~~~~~~~~~
walk.cpp:104:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  104 |         for (auto[v, w] : gp[u]) {
      |                  ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 604 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1105 ms 116012 KB Output is correct
4 Correct 1062 ms 117468 KB Output is correct
5 Correct 751 ms 100116 KB Output is correct
6 Correct 632 ms 88024 KB Output is correct
7 Correct 712 ms 100396 KB Output is correct
8 Correct 1474 ms 146988 KB Output is correct
9 Correct 819 ms 102956 KB Output is correct
10 Correct 1508 ms 165680 KB Output is correct
11 Correct 556 ms 62744 KB Output is correct
12 Correct 336 ms 42344 KB Output is correct
13 Correct 1279 ms 144636 KB Output is correct
14 Correct 219 ms 40296 KB Output is correct
15 Correct 255 ms 41572 KB Output is correct
16 Correct 239 ms 41316 KB Output is correct
17 Correct 290 ms 39780 KB Output is correct
18 Correct 196 ms 44384 KB Output is correct
19 Correct 6 ms 2200 KB Output is correct
20 Correct 90 ms 20464 KB Output is correct
21 Correct 316 ms 38504 KB Output is correct
22 Correct 261 ms 39224 KB Output is correct
23 Correct 225 ms 48996 KB Output is correct
24 Correct 257 ms 39012 KB Output is correct
25 Correct 297 ms 40028 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 79 ms 12928 KB Output is correct
2 Execution timed out 4091 ms 509852 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 79 ms 12928 KB Output is correct
2 Execution timed out 4091 ms 509852 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 604 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1105 ms 116012 KB Output is correct
21 Correct 1062 ms 117468 KB Output is correct
22 Correct 751 ms 100116 KB Output is correct
23 Correct 632 ms 88024 KB Output is correct
24 Correct 712 ms 100396 KB Output is correct
25 Correct 1474 ms 146988 KB Output is correct
26 Correct 819 ms 102956 KB Output is correct
27 Correct 1508 ms 165680 KB Output is correct
28 Correct 556 ms 62744 KB Output is correct
29 Correct 336 ms 42344 KB Output is correct
30 Correct 1279 ms 144636 KB Output is correct
31 Correct 219 ms 40296 KB Output is correct
32 Correct 255 ms 41572 KB Output is correct
33 Correct 239 ms 41316 KB Output is correct
34 Correct 290 ms 39780 KB Output is correct
35 Correct 196 ms 44384 KB Output is correct
36 Correct 6 ms 2200 KB Output is correct
37 Correct 90 ms 20464 KB Output is correct
38 Correct 316 ms 38504 KB Output is correct
39 Correct 261 ms 39224 KB Output is correct
40 Correct 225 ms 48996 KB Output is correct
41 Correct 257 ms 39012 KB Output is correct
42 Correct 297 ms 40028 KB Output is correct
43 Correct 79 ms 12928 KB Output is correct
44 Execution timed out 4091 ms 509852 KB Time limit exceeded
45 Halted 0 ms 0 KB -