oj.uz

Submission #414174

# Submission time Handle Problem Language Result Execution time Memory
414174 2021-05-30T08:17:19 Z ACmachine Swapping Cities (APIO20_swap) C++17
0 / 100
 2000 ms 25952 KB 
#include "swap.h"
#include <bits/stdc++.h>
using namespace std;

#define FOR(i, j, k, l) for(int i = (j); i < (k); i += (l))
#define FORD(i, j, k, l) for(int i = (j); i>=(k); i -= (l))
#define REP(i, n) FOR(i, 0, n, 1)
#define REPD(i, n) FORD(i, n, 0, 1)
#define pb push_back
typedef long long ll;
const int INF = (int)1e9 + 7;
const ll INFF = (ll)1e18;
struct dsu{
    vector<int> p;
    dsu(int n){
        p.resize(n, -1);
    }
    int find(int x){
        return (p[x] < 0 ? x : p[x] = find(p[x]));
    }
    bool same_set(int u, int v){
        return find(u) == find(v);
    }
    bool join(int u, int v){
        u = find(u);
        v = find(v);
        if(u == v)
            return false;
        if(-p[u] < -p[v])
            swap(u, v);
        p[u] += p[v]; p[v] = u;
        return true;
    }
};
// mstpath + dalsia cesta z X do Y bez mstpath edges
// mstpath + neico s deg 3
int n, m;
vector<bool> on_path;
vector<vector<array<int, 2>>> g; // mst;
vector<vector<int>> g_id;
vector<vector<array<int, 2>>> initg; 
bool fn = false;
void dfs(int v, int p, int dest, int ep){
    if(ep != -1 && !fn) 
        on_path[ep] = true;
    if(v == dest){
        fn = true;
        return;
    }
    REP(i, g[v].size()){
        if(fn) return;
        if(g[v][i][0] == p) 
            continue; 
        dfs(g[v][i][0], v, dest, g_id[v][i]);
    } 
    if(fn) return; 
    if(ep != -1)
        on_path[ep] = false; 
}
vector<array<int, 3>> edges;
vector<int> dist;
void get_dist(int v, int p, int w){
    dist[v] = w;
    for(auto x : g[v]){
        if(x[0] == p) 
            continue;
        get_dist(x[0], v, max(w, x[1]));
    }
}
void init(int N, int M, std::vector<int> U, std::vector<int> V, std::vector<int> W) {
    n = N; m = M;
    g.resize(n); initg.resize(n);
    g_id.resize(n);
    dist.resize(n);
    REP(i, m){
        initg[U[i]].pb({V[i], W[i]});
        initg[V[i]].pb({U[i], W[i]});
        edges.pb({W[i], U[i], V[i]});
    }
    sort(edges.begin(), edges.end());
    dsu d(n);
    int id = 0;
    for(auto e : edges){
        if(d.same_set(e[1], e[2])) 
            continue;
        g[e[1]].pb({e[2], e[0]});
        g[e[2]].pb({e[1], e[0]});
        g_id[e[1]].pb(id);
        g_id[e[2]].pb(id);
        d.join(e[1], e[2]);
        id++;
    }
    auto cmp = [&](array<int, 2> f, array<int, 2> s){
        return f[1] < s[1];
    };
    REP(i, n){
        sort(initg[i].begin(), initg[i].end(), cmp);
    }
}

int getMinimumFuelCapacity(int X, int Y) {
    vector<int> distf, dists;
    get_dist(X, -1, -INF);
    distf = dist;
    get_dist(Y, -1, -INF);
    dists = dist;
    fn = false;
    on_path = vector<bool>(m, false);
    dfs(X, -1, Y, -1);
    int ans = INF;
    int id = 0;
    dsu d(n); 
    if(m != n - 1){
        for(auto e : edges){
            //cout << X << " " << Y << " " << id << " " << on_path[id] << "\n";
            if(on_path[id]){
                id++;
                continue;
            }
            d.join(e[1], e[2]);
            if(d.same_set(X, Y)){
                ans = min(ans, max(e[0], distf[Y]));
                break;
            }
            id++;
        }
    }
    REP(i, n){
        if(initg[i].size() > 2){
            ans = min(ans, max({distf[Y], distf[i], dists[i], initg[i][2][1]}));
        }
    }
    if(ans == INF){
        return -1;
    }
    return ans;

    return 0;
}

Compilation message

swap.cpp: In function 'void dfs(int, int, int, int)':
swap.cpp:5:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    5 | #define FOR(i, j, k, l) for(int i = (j); i < (k); i += (l))
      |                                            ^
swap.cpp:7:19: note: in expansion of macro 'FOR'
    7 | #define REP(i, n) FOR(i, 0, n, 1)
      |                   ^~~
swap.cpp:50:5: note: in expansion of macro 'REP'
   50 |     REP(i, g[v].size()){
      |     ^~~

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 2 ms 460 KB Output is correct
7 Correct 2 ms 460 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 157 ms 19932 KB Output is correct
10 Correct 276 ms 24848 KB Output is correct
11 Correct 367 ms 24376 KB Output is correct
12 Correct 350 ms 25848 KB Output is correct
13 Correct 246 ms 25952 KB Output is correct
14 Execution timed out 2085 ms 20952 KB Time limit exceeded
15 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Execution timed out 2087 ms 23632 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #3
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 2 ms 460 KB Output is correct
7 Correct 2 ms 460 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 2 ms 460 KB Output is correct
11 Correct 2 ms 428 KB Output is correct
12 Correct 2 ms 460 KB Output is correct
13 Correct 2 ms 460 KB Output is correct
14 Correct 2 ms 460 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 2 ms 460 KB Output is correct
17 Correct 2 ms 460 KB Output is correct
18 Correct 2 ms 460 KB Output is correct
19 Correct 2 ms 332 KB Output is correct
20 Correct 2 ms 460 KB Output is correct
21 Correct 2 ms 460 KB Output is correct
22 Correct 2 ms 332 KB Output is correct
23 Correct 2 ms 460 KB Output is correct
24 Correct 3 ms 460 KB Output is correct
25 Incorrect 3 ms 460 KB Output isn't correct
26 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 2 ms 460 KB Output is correct
7 Correct 2 ms 460 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 2 ms 460 KB Output is correct
10 Correct 157 ms 19932 KB Output is correct
11 Correct 276 ms 24848 KB Output is correct
12 Correct 367 ms 24376 KB Output is correct
13 Correct 350 ms 25848 KB Output is correct
14 Correct 246 ms 25952 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 2 ms 428 KB Output is correct
17 Correct 2 ms 460 KB Output is correct
18 Correct 2 ms 460 KB Output is correct
19 Correct 2 ms 460 KB Output is correct
20 Correct 2 ms 460 KB Output is correct
21 Correct 2 ms 460 KB Output is correct
22 Correct 2 ms 460 KB Output is correct
23 Correct 2 ms 460 KB Output is correct
24 Correct 2 ms 332 KB Output is correct
25 Correct 2 ms 460 KB Output is correct
26 Correct 2 ms 460 KB Output is correct
27 Correct 2 ms 332 KB Output is correct
28 Correct 2 ms 460 KB Output is correct
29 Correct 3 ms 460 KB Output is correct
30 Incorrect 3 ms 460 KB Output isn't correct
31 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 2 ms 460 KB Output is correct
7 Correct 2 ms 460 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 157 ms 19932 KB Output is correct
10 Correct 276 ms 24848 KB Output is correct
11 Correct 367 ms 24376 KB Output is correct
12 Correct 350 ms 25848 KB Output is correct
13 Correct 246 ms 25952 KB Output is correct
14 Execution timed out 2085 ms 20952 KB Time limit exceeded
15 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 2 ms 460 KB Output is correct
7 Correct 2 ms 460 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 2 ms 460 KB Output is correct
10 Correct 157 ms 19932 KB Output is correct
11 Correct 276 ms 24848 KB Output is correct
12 Correct 367 ms 24376 KB Output is correct
13 Correct 350 ms 25848 KB Output is correct
14 Correct 246 ms 25952 KB Output is correct
15 Execution timed out 2085 ms 20952 KB Time limit exceeded
16 Halted 0 ms 0 KB -