oj.uz

Submission #1023899

# Submission time Handle Problem Language Result Execution time Memory
1023899 2024-07-15T09:08:08 Z c2zi6 Sky Walking (IOI19_walk) C++14
24 / 100
 4000 ms 522264 KB 
#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;
};

namespace TEST4 {
    struct SEGTREE {
        int n;
        VI tree;
        VI lazy;
        SEGTREE(int sz) {
            n = 1;
            while (n < sz) n *= 2;
            lazy = tree = VI(2*n, -1);
        }
        void push(int N) {
            if (lazy[N] == -1) return;
            tree[N] = lazy[N];
            if (N <= n-2) {
                lazy[2*N+1] = lazy[N];
                lazy[2*N+2] = lazy[N];
            }
            lazy[N] = -1;
        }
        int get(int N, int L, int R, int l, int r) {
            push(N);
            if (l <= L && R <= r) return tree[N];
            if (R < l || L > r) return -1;
            int M = (L + R) / 2;
            return max(get(2*N+1, L, M, l, r), get(2*N+2, M+1, R, l, r));
        }
        void upd(int N, int L, int R, int l, int r, int s) {
            push(N);
            if (R < l || L > r) return;
            if (l <= L && R <= r) {
                lazy[N] = s;
                push(N);
                return;
            }
            int M = (L + R) / 2;
            upd(2*N+1, L, M, l, r, s);
            upd(2*N+2, M+1, R, l, r, s);
            tree[N] = max(tree[2*N+1], tree[2*N+2]);
        }
        int get(int l, int r) {
            return get(0, 0, n-1, l, r);
        }
        int get(int i) {
            return get(0, 0, n-1, i, i);
        }
        void upd(int l, int r, int s) {
            upd(0, 0, n-1, l, r, s);
        }
    };
};

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]};
    vector<BRIDGE> bridges(L.size());
    rep(i, L.size()) bridges[i] = {L[i], R[i], Y[i]};
    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());
    };
    if (S == 0 && T == X.size()-1 && false) {
        /*TEST 4 */
        addvertex(0, 0);
        addvertex(X.size()-1, 0);
        /* vertical */
        sort(all(bridges), [](const BRIDGE& a, const BRIDGE& b){return a.y < b.y;});
        TEST4::SEGTREE seg(X.size());
        seg.upd(0, 0, 0);
        seg.upd(X.size()-1, X.size()-1, 0);
        for (auto&[l, r, y] : bridges) {
            addvertex(l, y);
            addvertex(r, y);
            for (int x : {l, r}) {
                int vy = seg.get(x);
                if (vy == -1) continue;
                addvertex(x, vy);
                int u = ind[{x, y}];
                int v = ind[{x, vy}];
                int w = y - vy;
                gp[u].pb({v, w});
                gp[v].pb({u, w});
            }
            seg.upd(l, r, y);
        }
        /* horizontal */
        VPI pts = point;
        sort(all(pts), [](const PII& a, const PII& b){return mkp(a.ss, a.ff) < mkp(b.ss, b.ff);});
        rep(i, pts.size()-1) {
            if (pts[i].ss == 0) continue;
            if (pts[i].ss != pts[i+1].ss) continue;
            int u = ind[pts[i]];
            int v = ind[pts[i+1]];
            int w = X[pts[i+1].ff] - X[pts[i].ff];
            gp[u].pb({v, w});
            gp[v].pb({u, w});
        }
    } else {
        /* TEST 1, 2 */
        addvertex(X[S], 0);
        addvertex(X[T], 0);
        for (auto&[a, b, c] : bridges) a = X[a], b = X[b]; 
        sort(all(buildings), [](const BUILDING& a, const BUILDING& b){return a.h > b.h;});
        sort(all(bridges), [](const BRIDGE& a, const BRIDGE& b){return a.y > b.y;});
        /* horizontal */
        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 */
        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:106:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  106 |     if (S == 0 && T == X.size()-1 && false) {
      |                   ~~^~~~~~~~~~~~~
walk.cpp:115:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  115 |         for (auto&[l, r, y] : bridges) {
      |                   ^
walk.cpp:146:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  146 |         for (auto&[a, b, c] : bridges) a = X[a], b = X[b];
      |                   ^
walk.cpp:151:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<BRIDGE>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  151 |         for (int j = 0, i = 0; i < bridges.size(); i++) {
      |                                ~~^~~~~~~~~~~~~~~~
walk.cpp:152:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  152 |             auto&[l, r, y] = bridges[i];
      |                  ^
walk.cpp:153:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<BUILDING>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  153 |             while (j < buildings.size() && buildings[j].h >= y) st.insert(buildings[j++].x);
      |                    ~~^~~~~~~~~~~~~~~~~~
walk.cpp:188:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  188 |         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 0 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 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 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 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1152 ms 116548 KB Output is correct
4 Correct 1109 ms 123944 KB Output is correct
5 Correct 763 ms 106376 KB Output is correct
6 Correct 680 ms 94212 KB Output is correct
7 Correct 777 ms 106540 KB Output is correct
8 Correct 1539 ms 147544 KB Output is correct
9 Correct 900 ms 106668 KB Output is correct
10 Correct 1602 ms 170512 KB Output is correct
11 Correct 599 ms 64476 KB Output is correct
12 Correct 341 ms 42260 KB Output is correct
13 Correct 1425 ms 149544 KB Output is correct
14 Correct 218 ms 41316 KB Output is correct
15 Correct 257 ms 41572 KB Output is correct
16 Correct 275 ms 43112 KB Output is correct
17 Correct 278 ms 41828 KB Output is correct
18 Correct 204 ms 44392 KB Output is correct
19 Correct 6 ms 2196 KB Output is correct
20 Correct 78 ms 20788 KB Output is correct
21 Correct 278 ms 40824 KB Output is correct
22 Correct 276 ms 41012 KB Output is correct
23 Correct 250 ms 53608 KB Output is correct
24 Correct 269 ms 41576 KB Output is correct
25 Correct 312 ms 41828 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 84 ms 13188 KB Output is correct
2 Execution timed out 4099 ms 522264 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 84 ms 13188 KB Output is correct
2 Execution timed out 4099 ms 522264 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 0 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 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1152 ms 116548 KB Output is correct
21 Correct 1109 ms 123944 KB Output is correct
22 Correct 763 ms 106376 KB Output is correct
23 Correct 680 ms 94212 KB Output is correct
24 Correct 777 ms 106540 KB Output is correct
25 Correct 1539 ms 147544 KB Output is correct
26 Correct 900 ms 106668 KB Output is correct
27 Correct 1602 ms 170512 KB Output is correct
28 Correct 599 ms 64476 KB Output is correct
29 Correct 341 ms 42260 KB Output is correct
30 Correct 1425 ms 149544 KB Output is correct
31 Correct 218 ms 41316 KB Output is correct
32 Correct 257 ms 41572 KB Output is correct
33 Correct 275 ms 43112 KB Output is correct
34 Correct 278 ms 41828 KB Output is correct
35 Correct 204 ms 44392 KB Output is correct
36 Correct 6 ms 2196 KB Output is correct
37 Correct 78 ms 20788 KB Output is correct
38 Correct 278 ms 40824 KB Output is correct
39 Correct 276 ms 41012 KB Output is correct
40 Correct 250 ms 53608 KB Output is correct
41 Correct 269 ms 41576 KB Output is correct
42 Correct 312 ms 41828 KB Output is correct
43 Correct 84 ms 13188 KB Output is correct
44 Execution timed out 4099 ms 522264 KB Time limit exceeded
45 Halted 0 ms 0 KB -