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Submission #1054474

# Submission time Handle Problem Language Result Execution time Memory
1054474 2024-08-12T10:11:39 Z Kipras Swapping Cities (APIO20_swap) C++17
6 / 100
 221 ms 21336 KB 
#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
//#include "swap.h"

const ll maxN = 1e5+10;
const ll inf = 1e18;

ll par[maxN], timeP[maxN], cycle[maxN], sz[maxN];
ll n, m;
vector<ll> adj[maxN];
vector<pair<ll, pair<ll, ll>>> edges;

ll find(ll node, ll t) {
    if(par[node]==node)return node;
    if(timeP[node]<=t) {
        return find(par[node], t);
    }
    return node;
}

void unite(ll a, ll b, ll t, bool is){
    a = find(a, t);
    b = find(b, t);
    if(a==b){
        cycle[a]=min(cycle[a], t);
        cycle[b]=min(cycle[b], t);
        return;
    }
    if(sz[a]>sz[b]) {
        swap(a, b);
    }

    if(cycle[a]==0&&cycle[b]!=0)
        cycle[a]=cycle[b];
    else if(cycle[b]==0&&cycle[a]!=0)
        cycle[b]=cycle[a];

    if(is) {
        if(cycle[a]==0)cycle[a]=t;
        if(cycle[b]==0)cycle[b]=t;
    }

    sz[b]+=sz[a];
    par[a]=b;
    timeP[a]=t;
}

void init(int N, int M, vector<int> U, vector<int> V, vector<int> W) {
    n=N; m=M;
    for(int i = 0; i < m; i++) {
        edges.push_back({W[i], {U[i], V[i]}});
    }
    for(int i = 0; i <= n; i++) {
        par[i]=i;
        sz[i]=1;
        cycle[i]=inf;
    }
    sort(edges.begin(), edges.end());
    for(auto i : edges) {
        ll v = i.second.first, u = i.second.second;
        ll w = i.first;
        adj[v].push_back(u);
        adj[u].push_back(v);
        bool is = 0;
        if(adj[v].size()>2||adj[u].size()>2)is=1;
        unite(v, u, w, is);
    }
}

int getMinimumFuelCapacity(int X, int Y) {
    ll l = 0, h = 1e15;
    while(l < h && l < 1e10) {
        ll m = (l+h)/2;
        ll v1 = find(X, m), v2 = find(Y, m);
        //cout<<m<<" "<<X<<" "<<Y<<" "<<l<<" "<<h<<" "<<v1<<" "<<v2<<" "<<cycle[v1]<<" "<<cycle[v2]<<"\n";
        if(v1==v2&&cycle[v1]<=m) {
            h=m;
        }else l = m+1;
    }
    if(h>1e10) {
        return -1;
    }else return l;
}



/*

5 6
0 0 1 1 1 2
1 2 2 3 4 3
4 4 1 2 10 3
3
1 2
2 4
0 1


3 2
0 0
1 2
5 5
1
1 2


*/

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4700 KB Output is correct
2 Correct 1 ms 4724 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 1 ms 4700 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct
6 Correct 1 ms 4812 KB Output is correct
7 Correct 2 ms 4700 KB Output is correct
8 Correct 1 ms 4700 KB Output is correct
9 Correct 33 ms 13072 KB Output is correct
10 Correct 36 ms 14716 KB Output is correct
11 Correct 37 ms 15372 KB Output is correct
12 Correct 35 ms 15516 KB Output is correct
13 Correct 34 ms 15296 KB Output is correct
14 Correct 31 ms 13980 KB Output is correct
15 Correct 77 ms 19024 KB Output is correct
16 Correct 73 ms 18152 KB Output is correct
17 Correct 80 ms 18768 KB Output is correct
18 Correct 82 ms 18664 KB Output is correct
19 Correct 128 ms 10952 KB Output is correct
20 Correct 194 ms 20540 KB Output is correct
21 Correct 221 ms 20508 KB Output is correct
22 Correct 215 ms 21148 KB Output is correct
23 Correct 116 ms 21336 KB Output is correct

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4700 KB Output is correct
2 Correct 1 ms 4724 KB Output is correct
3 Incorrect 70 ms 18272 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4700 KB Output is correct
2 Correct 1 ms 4724 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 1 ms 4700 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct
6 Correct 1 ms 4812 KB Output is correct
7 Correct 2 ms 4700 KB Output is correct
8 Correct 1 ms 4700 KB Output is correct
9 Correct 1 ms 4720 KB Output is correct
10 Incorrect 1 ms 4700 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4720 KB Output is correct
2 Correct 1 ms 4700 KB Output is correct
3 Correct 1 ms 4724 KB Output is correct
4 Correct 1 ms 4700 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct
6 Correct 1 ms 4700 KB Output is correct
7 Correct 1 ms 4812 KB Output is correct
8 Correct 2 ms 4700 KB Output is correct
9 Correct 1 ms 4700 KB Output is correct
10 Correct 33 ms 13072 KB Output is correct
11 Correct 36 ms 14716 KB Output is correct
12 Correct 37 ms 15372 KB Output is correct
13 Correct 35 ms 15516 KB Output is correct
14 Correct 34 ms 15296 KB Output is correct
15 Incorrect 1 ms 4700 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4700 KB Output is correct
2 Correct 1 ms 4724 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 1 ms 4700 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct
6 Correct 1 ms 4812 KB Output is correct
7 Correct 2 ms 4700 KB Output is correct
8 Correct 1 ms 4700 KB Output is correct
9 Correct 33 ms 13072 KB Output is correct
10 Correct 36 ms 14716 KB Output is correct
11 Correct 37 ms 15372 KB Output is correct
12 Correct 35 ms 15516 KB Output is correct
13 Correct 34 ms 15296 KB Output is correct
14 Correct 31 ms 13980 KB Output is correct
15 Correct 77 ms 19024 KB Output is correct
16 Correct 73 ms 18152 KB Output is correct
17 Correct 80 ms 18768 KB Output is correct
18 Correct 82 ms 18664 KB Output is correct
19 Incorrect 70 ms 18272 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4720 KB Output is correct
2 Correct 1 ms 4700 KB Output is correct
3 Correct 1 ms 4724 KB Output is correct
4 Correct 1 ms 4700 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct
6 Correct 1 ms 4700 KB Output is correct
7 Correct 1 ms 4812 KB Output is correct
8 Correct 2 ms 4700 KB Output is correct
9 Correct 1 ms 4700 KB Output is correct
10 Correct 33 ms 13072 KB Output is correct
11 Correct 36 ms 14716 KB Output is correct
12 Correct 37 ms 15372 KB Output is correct
13 Correct 35 ms 15516 KB Output is correct
14 Correct 34 ms 15296 KB Output is correct
15 Correct 31 ms 13980 KB Output is correct
16 Correct 77 ms 19024 KB Output is correct
17 Correct 73 ms 18152 KB Output is correct
18 Correct 80 ms 18768 KB Output is correct
19 Correct 82 ms 18664 KB Output is correct
20 Incorrect 70 ms 18272 KB Output isn't correct
21 Halted 0 ms 0 KB -