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Submission #999395

# Submission time Handle Problem Language Result Execution time Memory
999395 2024-06-15T12:17:26 Z amine_aroua Highway Tolls (IOI18_highway) C++17
12 / 100
 73 ms 8612 KB 
#include<bits/stdc++.h>
using namespace std;
#define intt long long
#define pb push_back
#define forr(i , x , y) for(int i = x; i <= y;i++)
#define fore(i , n) for(int i = 0 ; i < n;i++)
#define forn(i ,x , y) for(int i = x ; i >= y;i--)
long long ask(const vector<int> &w);
void answer(int s, int t);
const int MAXN = 90001;
intt a , b;
vector<pair<int ,int>> adj[MAXN];
vector<int> zeros , ones;
vector<int> nodes;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
void dfs(int x , int p , intt val , intt dep)
{
    if(dep == (val/b))
    {
        nodes.pb(x);
        return;
    }
    for(auto [u , i] : adj[x])
    {
        if(u == p)
            continue;
        dfs(u , x , val ,dep + 1 );
    }
}
int findT(int S)
{
    intt val = ask(ones);
    dfs(0 , -1 , val , 0);
    int l = 0 , r = (int)nodes.size();
    vector<int> asked = ones;
    while(l + 1 < r)
    {
        int mid = (l + r)/2;
        asked = ones;
        forr(j , 0 , mid - 1) {
            for(auto [u , i] : adj[nodes[j]])
                asked[i] = 0;
        }
        if(ask(asked) == val)
            l = mid;
        else
            r = mid;
    }
    return nodes[l];
}
void find_pair(int N, vector<int> U, vector<int> V, int A, int B)
{
    a = A , b = B;
    int m = (int)U.size();
    zeros.assign(m , 0);
    ones.assign(m , 1);
    fore(i , N)adj[i].clear();
    fore(i , m)
    {
        adj[U[i]].pb({V[i] , i});
        adj[V[i]].pb({U[i] , i});
    }
    answer(0 ,findT(0));
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2392 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 2 ms 2392 KB Output is correct
6 Correct 1 ms 2392 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 1 ms 2392 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2392 KB Output is correct
11 Correct 2 ms 2392 KB Output is correct
12 Correct 1 ms 2392 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 7 ms 3136 KB Output is correct
3 Correct 73 ms 8516 KB Output is correct
4 Correct 66 ms 8492 KB Output is correct
5 Correct 68 ms 8488 KB Output is correct
6 Correct 67 ms 8412 KB Output is correct
7 Correct 70 ms 8524 KB Output is correct
8 Correct 61 ms 8508 KB Output is correct
9 Correct 61 ms 8404 KB Output is correct
10 Correct 69 ms 8484 KB Output is correct
11 Correct 64 ms 8080 KB Output is correct
12 Correct 64 ms 8356 KB Output is correct
13 Correct 58 ms 8252 KB Output is correct
14 Correct 67 ms 8612 KB Output is correct

Subtask #3
0 / 6.0

# Verdict Execution time Memory Grader output
1 Incorrect 7 ms 2904 KB Output is incorrect: {s, t} is wrong.
2 Halted 0 ms 0 KB -

Subtask #4
0 / 33.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2392 KB Output is incorrect: {s, t} is wrong.
2 Halted 0 ms 0 KB -

Subtask #5
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 11 ms 3800 KB Output is incorrect: {s, t} is wrong.
2 Halted 0 ms 0 KB -

Subtask #6
0 / 31.0

# Verdict Execution time Memory Grader output
1 Incorrect 8 ms 3160 KB Output is incorrect: {s, t} is wrong.
2 Halted 0 ms 0 KB -