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Submission #1013802

# Submission time Handle Problem Language Result Execution time Memory
1013802 2024-07-04T06:07:53 Z 김은성(#10850) Highway Tolls (IOI18_highway) C++17
0 / 100
 8 ms 4184 KB 
#include "highway.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
vector<pair<int, int> > graph[90009];
int edge[90009];
int depth[90009];
bool ch[90009];
void dfs(int v){
    ch[v] = 1;
    int i;
    for(i=0; i<graph[v].size(); i++){
        int u = graph[v][i].second;
        edge[u] = graph[v][i].first;
        if(ch[u])
            continue;
        depth[u] = depth[v] + 1;
        dfs(u);
    }
}
void find_pair(int N, std::vector<int> U, std::vector<int> V, int A, int B) {
    int M = U.size(), i;
    vector<int> toll(M);
    for(i=0; i<M; i++){
        graph[U[i]].push_back(make_pair(i, V[i]));
        graph[V[i]].push_back(make_pair(i, U[i]));
    }
    dfs(0);
    ll ret = ask(toll);
    int d = (ll)ret / A;
    vector<pair<int, int> > e;
    for(i=0; i<N; i++){
        if(depth[i] == d){
            e.push_back(make_pair(edge[i], i));
        }
    }
    int lo = 0, hi = (int)e.size() - 1, mid;
    while(lo < hi){
        mid = (lo+hi)/2;
        for(i=0; i<=mid; i++)
            toll[e[i].first] = 1;
        for(i=mid+1; i<=hi; i++)
            toll[e[i].second] = 0;
        ll ret2 = ask(toll);
        if(ret != ret2)
            hi = mid;
        else
            lo = mid+1;
    }
    answer(0, e[lo].second);
}

Compilation message

highway.cpp: In function 'void dfs(int)':
highway.cpp:12:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     for(i=0; i<graph[v].size(); i++){
      |              ~^~~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

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

Subtask #2
0 / 7.0

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

Subtask #3
0 / 6.0

# Verdict Execution time Memory Grader output
1 Incorrect 7 ms 4184 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 3160 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 8 ms 3928 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 7 ms 3928 KB Output is incorrect: {s, t} is wrong.
2 Halted 0 ms 0 KB -