oj.uz

Submission #1013298

# Submission time Handle Problem Language Result Execution time Memory
1013298 2024-07-03T11:46:33 Z c2zi6 Highway Tolls (IOI18_highway) C++14
5 / 100
 228 ms 262144 KB 
#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define replr(i, a, b) for (int i = int(a); i <= int(b); ++i)
#define reprl(i, a, b) for (int i = int(a); i >= int(b); --i)
#define rep(i, n) for (int i = 0; i < int(n); ++i)
#define mkp(a, b) make_pair(a, b)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef vector<int> VI;
typedef vector<PII> VPI;
typedef vector<VI> VVI;
typedef vector<VVI> VVVI;
typedef vector<VPI> VVPI;
typedef pair<ll, ll> PLL;
typedef vector<ll> VL;
typedef vector<PLL> VPL;
typedef vector<VL> VVL;
typedef vector<VVL> VVVL;
typedef vector<VPL> VVPL;
template<class T> T setmax(T& a, T b) {if (a < b) return a = b; return a;}
template<class T> T setmin(T& a, T b) {if (a < b) return a; return a = b;}
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template<class T>
using indset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#include "highway.h"

int n, m;
VVPI gp;
VI depth;
VI parind;

void dfs(int u = 0, int pind = -1) {
    parind[u] = pind;
    for (auto[v, ind] : gp[u]) if (ind != pind) {
        depth[v] = depth[u]+1;
        dfs(v, ind);
    }
}

void find_pair(int N, std::vector<int> U, std::vector<int> V, int A, int B) {
    n = N;
    m = U.size();
    gp = VVPI(n);
    rep(i, m) {
        gp[U[i]].pb({V[i], i});
        gp[V[i]].pb({U[i], i});
    }
    depth = parind = VI(n);
    dfs();
    int base = ask(VI(m));
    int d = base/A;

    VI b;
    rep(u, n) if (depth[u] == d) b.pb(u);

    auto f = [&](int x) {
        VI W(m);
        replr(i, 0, x) W[parind[b[i]]] = true;
        return ask(W) > base;
    };

    int l = -1, r = b.size()-1;
    while (l + 1 < r) {
        int m = (l + r) / 2;
        if (f(m)) r = m;
        else l = m;
    }
    answer(0, b[r]);
}

/*ask(VI w);*/
/*answer(int s, int t)*/

Compilation message

highway.cpp: In function 'void dfs(int, int)':
highway.cpp:41:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   41 |     for (auto[v, ind] : gp[u]) if (ind != pind) {
      |              ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 6 ms 1368 KB Output is correct
3 Correct 62 ms 8500 KB Output is correct
4 Correct 61 ms 8476 KB Output is correct
5 Correct 64 ms 8472 KB Output is correct
6 Correct 68 ms 8528 KB Output is correct
7 Correct 64 ms 8892 KB Output is correct
8 Correct 74 ms 8600 KB Output is correct
9 Correct 76 ms 8296 KB Output is correct
10 Correct 74 ms 8480 KB Output is correct
11 Correct 65 ms 8800 KB Output is correct
12 Correct 71 ms 9200 KB Output is correct
13 Correct 64 ms 8796 KB Output is correct
14 Incorrect 71 ms 8452 KB Output is incorrect: {s, t} is wrong.
15 Halted 0 ms 0 KB -

Subtask #3
0 / 6.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 1624 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 344 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 228 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 215 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -