oj.uz

Submission #781435

# Submission time Handle Problem Language Result Execution time Memory
781435 2023-07-13T06:23:12 Z vjudge1 Highway Tolls (IOI18_highway) C++17
12 / 100
 229 ms 262144 KB 
#include "highway.h"
#include<bits/stdc++.h>
using namespace std;
vector<pair<int, int>> adj[100100];
int dep[100100], par[100100];
void dfs(int n, int p = -1, int d = 0) {
    dep[n] = d;
    for(auto i: adj[n])
        if(i.first!=p)
            dfs(i.first, n, d+1), par[i.first] = i.second;
}
void find_pair(int N, std::vector<int> U, std::vector<int> V, int A, int B) {
    for(int i = 0; i < N-1; i++)
        adj[U[i]].push_back({V[i], i}), adj[V[i]].push_back({U[i], i});
    dfs(0);
    int M = U.size();
    std::vector<int> w(M, 0);
    long long toll = ask(w);
    int dis = toll/A;
    vector<int> x;
    for(int i = 0; i < N; i++)
        if(dep[i]==dis)
            x.push_back(i);
    while(x.size() > 1) {
        vector<int> a,b,c(N-1,0);
        for(int i = 0; i < x.size()/2; i++) {
            a.push_back(x[i]);
            c[par[x[i]]] = 1;
        }
        for(int i = x.size()/2; i < x.size(); i++) {
            b.push_back(x[i]);
        }
        if(ask(c)>toll)
            x = a;
        else 
            x = b;
    }
    answer(0, x[0]);
}

Compilation message

highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:26:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |         for(int i = 0; i < x.size()/2; i++) {
      |                        ~~^~~~~~~~~~~~
highway.cpp:30:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |         for(int i = x.size()/2; i < x.size(); i++) {
      |                                 ~~^~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2640 KB Output is correct
2 Correct 1 ms 2640 KB Output is correct
3 Correct 1 ms 2664 KB Output is correct
4 Correct 1 ms 2640 KB Output is correct
5 Correct 2 ms 2640 KB Output is correct
6 Correct 1 ms 2640 KB Output is correct
7 Correct 2 ms 2640 KB Output is correct
8 Correct 2 ms 2664 KB Output is correct
9 Correct 1 ms 2640 KB Output is correct
10 Correct 1 ms 2640 KB Output is correct
11 Correct 2 ms 2640 KB Output is correct
12 Correct 1 ms 2640 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2640 KB Output is correct
2 Correct 12 ms 3236 KB Output is correct
3 Correct 61 ms 8952 KB Output is correct
4 Correct 53 ms 8988 KB Output is correct
5 Correct 94 ms 8872 KB Output is correct
6 Correct 101 ms 8812 KB Output is correct
7 Correct 83 ms 8900 KB Output is correct
8 Correct 65 ms 8984 KB Output is correct
9 Correct 106 ms 8852 KB Output is correct
10 Correct 98 ms 8992 KB Output is correct
11 Correct 75 ms 9064 KB Output is correct
12 Correct 66 ms 9448 KB Output is correct
13 Correct 77 ms 9200 KB Output is correct
14 Correct 73 ms 8852 KB Output is correct

Subtask #3
0 / 6.0

# Verdict Execution time Memory Grader output
1 Incorrect 9 ms 3536 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 2 ms 2640 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 Runtime error 229 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #6
0 / 31.0

# Verdict Execution time Memory Grader output
1 Runtime error 229 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -