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Submission #1055536

# Submission time Handle Problem Language Result Execution time Memory
1055536 2024-08-12T21:13:07 Z mariaclara Fountain Parks (IOI21_parks) C++17
5 / 100
 95 ms 40140 KB 
#include "parks.h"
#include<bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int,int> pii;
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
#define mk make_pair
#define pb push_back
#define fr first
#define sc second

int construct_roads(vector<int> x, vector<int> y) {
    int n = sz(x);
    vector<pair<pii,int>> p(n);
    vector<int> u_ans, v_ans, a_ans, b_ans;
    map<pii, int> ind;

    for(int i = 0; i < n; i++)
        p[i] = {{x[i], y[i]},i}, ind[{x[i], y[i]}] = i;

    sort(all(p));

    vector<vector<pii>> v(7);
    queue<pii> inter[7];

    for(int i = 0; i < n; i++)
        v[p[i].fr.fr].pb({p[i].fr.sc, p[i].sc});

    for(int i = 0, last = -1; i < sz(v[2]); i++) {
        if(last == -1) last = v[2][i].fr;
        if(i+1 == sz(v[2]) or v[2][i+1].fr - v[2][i].fr != 2) { 
            inter[2].push({last, v[2][i].fr});
            last = -1;
            continue; 
        }
        u_ans.pb(v[2][i].sc);
        v_ans.pb(v[2][i+1].sc);
        a_ans.pb(1);
        b_ans.pb(v[2][i].fr + 1);
    }

    for(int i = 0, last = -1; i < sz(v[6]); i++) {
        if(i+1 == sz(v[6]) or v[6][i+1].fr - v[6][i].fr != 2) { 
            inter[6].push({last, v[6][i].fr});
            last = -1;
            continue; 
        } 
        u_ans.pb(v[6][i].sc);
        v_ans.pb(v[6][i+1].sc);
        a_ans.pb(7);
        b_ans.pb(v[6][i].fr + 1);
    }

    vector<pii> to_add_1, to_add_2;
    set<pii> used; // a e b
    bool ok2 = 0, ok6 = 0;

    for(int i = 0, last = -1; i < sz(v[4]); i++) {
        int pos = v[4][i].fr;

        if(last == -1) last = pos;

        if(sz(inter[2]) and inter[2].front().sc < pos and ok2) inter[2].pop(), ok2 = 0;
        if(sz(inter[2]) and inter[2].front().fr <= pos and pos <= inter[2].front().sc) {
            if(last <= pos-2 and inter[2].front().fr <= pos-2) continue;
            u_ans.pb(v[4][i].sc);
            v_ans.pb(ind[{2,pos}]);
            a_ans.pb({3});
            b_ans.pb({pos-1});
            used.insert({3, pos-1});
            ok2 = 1;
        }

        if(sz(inter[6]) and inter[6].front().sc < pos and ok6) inter[6].pop(), ok6 = 0;
        if(sz(inter[6]) and inter[6].front().fr <= pos and pos <= inter[6].front().sc) {
            if(last <= pos-2 and inter[6].front().fr <= pos-2) continue;
            to_add_2.pb({v[4][i].sc, ind[{6,pos}]});
            ok6 = 1;
        }

        if(i+1 == sz(v[4]) or v[4][i+1].fr - v[4][i].fr != 2) last = -1;
        else if(i+1 < sz(v[4])) to_add_1.pb({v[4][i].sc, v[4][i+1].sc});
    }

    for(auto [A,B] : to_add_1) {
        if(used.count({3,y[A]+1})) {
            u_ans.pb(A);
            v_ans.pb(B);
            a_ans.pb(5);
            b_ans.pb(y[A]+1);
            used.insert({5,y[A]+1});
        }
        else {
            u_ans.pb(A);
            v_ans.pb(B);
            a_ans.pb(3);
            b_ans.pb(y[A]+1);
        }
    }

    for(auto [A,B] : to_add_2) {
        if(used.count({5,y[A]-1})) {
            u_ans.pb(A);
            v_ans.pb(B);
            a_ans.pb(5);
            b_ans.pb(y[A]+1);
        }
        else {
            u_ans.pb(A);
            v_ans.pb(B);
            a_ans.pb(5);
            b_ans.pb(y[A]-1);
        }
    }

    vector<int> edges[n];

    for(int i = 0; i < sz(u_ans); i++) 
        edges[u_ans[i]].pb(v_ans[i]), edges[v_ans[i]].pb(u_ans[i]);

    queue<int> fila;
    vector<bool> vis(n);
    fila.push(0);
    vis[0] = 1;

    while(!fila.empty()) {
        int at = fila.front();
        fila.pop();

        for(int viz : edges[at])
            if(!vis[viz]) fila.push(viz), vis[viz] = 1;
    }

    for(int i = 0; i < n; i++) if(!vis[i]) return 0;

    build(u_ans, v_ans, a_ans, b_ans);
    return 1;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 436 KB Output is correct
3 Correct 0 ms 388 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 68 ms 21204 KB Output is correct
10 Correct 5 ms 2568 KB Output is correct
11 Correct 24 ms 11484 KB Output is correct
12 Correct 11 ms 3500 KB Output is correct
13 Correct 14 ms 8156 KB Output is correct
14 Correct 1 ms 600 KB Output is correct
15 Correct 1 ms 552 KB Output is correct
16 Correct 68 ms 21188 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 436 KB Output is correct
3 Correct 0 ms 388 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 68 ms 21204 KB Output is correct
10 Correct 5 ms 2568 KB Output is correct
11 Correct 24 ms 11484 KB Output is correct
12 Correct 11 ms 3500 KB Output is correct
13 Correct 14 ms 8156 KB Output is correct
14 Correct 1 ms 600 KB Output is correct
15 Correct 1 ms 552 KB Output is correct
16 Correct 68 ms 21188 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Incorrect 0 ms 344 KB Solution announced impossible, but it is possible.
20 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 436 KB Output is correct
3 Correct 0 ms 388 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 68 ms 21204 KB Output is correct
10 Correct 5 ms 2568 KB Output is correct
11 Correct 24 ms 11484 KB Output is correct
12 Correct 11 ms 3500 KB Output is correct
13 Correct 14 ms 8156 KB Output is correct
14 Correct 1 ms 600 KB Output is correct
15 Correct 1 ms 552 KB Output is correct
16 Correct 68 ms 21188 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Incorrect 0 ms 344 KB Solution announced impossible, but it is possible.
20 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 436 KB Output is correct
3 Correct 0 ms 388 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 68 ms 21204 KB Output is correct
10 Correct 5 ms 2568 KB Output is correct
11 Correct 24 ms 11484 KB Output is correct
12 Correct 11 ms 3500 KB Output is correct
13 Correct 14 ms 8156 KB Output is correct
14 Correct 1 ms 600 KB Output is correct
15 Correct 1 ms 552 KB Output is correct
16 Correct 68 ms 21188 KB Output is correct
17 Runtime error 1 ms 348 KB Execution killed with signal 11
18 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 436 KB Output is correct
3 Correct 0 ms 388 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 68 ms 21204 KB Output is correct
10 Correct 5 ms 2568 KB Output is correct
11 Correct 24 ms 11484 KB Output is correct
12 Correct 11 ms 3500 KB Output is correct
13 Correct 14 ms 8156 KB Output is correct
14 Correct 1 ms 600 KB Output is correct
15 Correct 1 ms 552 KB Output is correct
16 Correct 68 ms 21188 KB Output is correct
17 Runtime error 95 ms 40140 KB Execution killed with signal 11
18 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 436 KB Output is correct
3 Correct 0 ms 388 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 68 ms 21204 KB Output is correct
10 Correct 5 ms 2568 KB Output is correct
11 Correct 24 ms 11484 KB Output is correct
12 Correct 11 ms 3500 KB Output is correct
13 Correct 14 ms 8156 KB Output is correct
14 Correct 1 ms 600 KB Output is correct
15 Correct 1 ms 552 KB Output is correct
16 Correct 68 ms 21188 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Incorrect 0 ms 344 KB Solution announced impossible, but it is possible.
20 Halted 0 ms 0 KB -