oj.uz

Submission #1013339

# Submission time Handle Problem Language Result Execution time Memory
1013339 2024-07-03T12:27:25 Z c2zi6 Highway Tolls (IOI18_highway) C++14
51 / 100
 286 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;
VI par;

VI euler;
void dfs(int u = 0, int p = -1, int pind = -1) {
    if (u) euler.pb(u);
    parind[u] = pind;
    par[u] = p;
    for (auto[v, ind] : gp[u]) if (ind != pind) {
        depth[v] = depth[u]+1;
        dfs(v, u, 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 = par = VI(n);
    euler = VI();
    dfs();
    ll base = ask(VI(m));
    int d = base/A;

    int s;
    if (true) {
        /*searching for value of s*/
        auto f = [&](int x) {
            VI W(m);
            replr(i, 0, x) W[parind[euler[i]]] = true;
            return (ask(W)-base)/(B-A);
        };
        int l = -1, r = m-1;
        while (l+1 < r) {
            int m = (l + r) / 2;
            if (f(m) < d) l = m;
            else r = m;
        }
        s = euler[r];
    }
    /*cout << "FIRST NODE: " << s << endl;*/
    depth = parind = par = VI(n);
    euler = VI();
    dfs(s);
    int t;
    if (true) {
        /*searching for value of t*/
        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;
        }
        t = b[r];
    }
    /*cout << "SECOND NODE: " << t << endl;*/
    answer(s, t);
}

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

Compilation message

highway.cpp: In function 'void dfs(int, int, int)':
highway.cpp:45:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   45 |     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 348 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 404 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 1 ms 344 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 9 ms 1276 KB Output is correct
3 Correct 69 ms 9308 KB Output is correct
4 Correct 72 ms 9740 KB Output is correct
5 Correct 72 ms 9212 KB Output is correct
6 Correct 72 ms 9196 KB Output is correct
7 Correct 71 ms 9728 KB Output is correct
8 Correct 75 ms 9244 KB Output is correct
9 Correct 69 ms 9224 KB Output is correct
10 Correct 74 ms 9260 KB Output is correct
11 Correct 67 ms 9564 KB Output is correct
12 Correct 74 ms 10140 KB Output is correct
13 Correct 70 ms 9700 KB Output is correct
14 Correct 80 ms 9708 KB Output is correct

Subtask #3
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 1624 KB Output is correct
2 Correct 11 ms 3160 KB Output is correct
3 Correct 20 ms 4584 KB Output is correct
4 Correct 62 ms 12912 KB Output is correct
5 Correct 59 ms 12900 KB Output is correct
6 Correct 61 ms 12764 KB Output is correct
7 Correct 58 ms 12816 KB Output is correct
8 Correct 67 ms 12792 KB Output is correct
9 Correct 60 ms 12764 KB Output is correct

Subtask #4
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 10 ms 1448 KB Output is correct
3 Correct 66 ms 7416 KB Output is correct
4 Correct 78 ms 9204 KB Output is correct
5 Correct 69 ms 9416 KB Output is correct
6 Correct 69 ms 9200 KB Output is correct
7 Correct 72 ms 9180 KB Output is correct
8 Correct 85 ms 9160 KB Output is correct
9 Correct 74 ms 9252 KB Output is correct
10 Correct 75 ms 9244 KB Output is correct
11 Correct 91 ms 9228 KB Output is correct
12 Correct 84 ms 10184 KB Output is correct
13 Correct 91 ms 9848 KB Output is correct
14 Correct 79 ms 10096 KB Output is correct
15 Correct 68 ms 9252 KB Output is correct
16 Correct 64 ms 9188 KB Output is correct
17 Correct 82 ms 9932 KB Output is correct
18 Correct 76 ms 9928 KB Output is correct
19 Correct 69 ms 9180 KB Output is correct
20 Correct 75 ms 10528 KB Output is correct
21 Correct 62 ms 10252 KB Output is correct
22 Correct 72 ms 9868 KB Output is correct
23 Correct 76 ms 9788 KB Output is correct
24 Correct 85 ms 10108 KB Output is correct
25 Correct 98 ms 12544 KB Output is correct

Subtask #5
0 / 18.0

# Verdict Execution time Memory Grader output
1 Runtime error 286 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 251 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -