oj.uz

Submission #483234

# Submission time Handle Problem Language Result Execution time Memory
483234 2021-10-28T10:21:38 Z syl123456 Parachute rings (IOI12_rings) C++17
37 / 100
 983 ms 107556 KB 
#include <bits/stdc++.h>
#define all(i) (i).begin(), (i).end()
using namespace std;
template<typename T1, typename T2>
ostream& operator << (ostream &i, pair<T1, T2> j) {
    return i << j.first << ' ' << j.second;
}
template<typename T>
ostream& operator << (ostream &i, vector<T> j) {
    i << '{' << j.size() << ':';
    for (T ii : j) i << ' ' << ii;
    return i << '}';
}
void Debug(bool _split) {}
template<typename T1, typename ...T2>
void Debug(bool _split, T1 x, T2 ...args) {
    if (_split)
        cerr << ", ";
    cerr << x, Debug(true, args...);
}
template<typename T>
void Debuga(T *i, int n) {
    cerr << '[';
    for (int j = 0; j < n; ++j) cerr << i[j] << " ]"[j == n - 1];
    cerr << endl;
}
#ifdef SYL
#define debug(args...) cerr << "Line(" << __LINE__ << ") -> [" << #args << "] is [", Debug(false, args), cerr << ']' << endl
#define debuga(i) cerr << "Line(" << __LINE__ << ") -> [" << #i << "] is ", Debuga(i, sizeof(i) / sizeof(typeid(*i).name()))
#else
#define debug(args...) void(0)
#define debuga(i) void(0)
#endif
typedef long long ll;
typedef pair<int, int> pi;
const int inf = 0x3f3f3f3f, lg = 20;
const ll mod = 1e9 + 7, INF = 0x3f3f3f3f3f3f3f3f;

vector<int> deg, rt, stk, ring;
vector<int> v;
vector<vector<int>> g;
vector<bool> vis;
bool fail, first;
int n;

int find(int i) {
    return rt[i] = rt[i] == i ? i : find(rt[i]);
}

void dfs(int i, int p) {
    vis[i] = true;
    stk.push_back(i);
    for (int j : g[i])
        if (j != p) {
            if (!vis[j])
                dfs(j, i);
            else {
                while (stk.back() != j)
                    ring.push_back(stk.back()), stk.pop_back();
                ring.push_back(j);
                return;
            }
            if (!ring.empty())
                return;
        }
    stk.pop_back();
}

void upd(vector<int> tmp) {
    if (fail)
        return;
    if (v.empty()) {
        v = tmp;
        return;
    }
    for (int i = 0; i < (int)v.size(); ) {
        bool find = false;
        for (int j : tmp)
            if (v[i] == j) {
                find = true;
            }
        if (!find)
            swap(v[i], v.back()), v.pop_back();
        else
            ++i;
    }
    if (v.empty())
        fail = true;
}

void Init(int N) {
    deg.assign(N, 0);
    rt.resize(N);
    iota(all(rt), 0);
    vis.assign(N, false);
    g.assign(N, vector<int>());
    fail = false, first = true;
    n = N;
}

void Link(int x, int y) {
    if (fail)
        return;
    ++deg[x], ++deg[y];
    g[x].push_back(y), g[y].push_back(x);
    if (deg[x] == 4) {
        vector<int> tmp(1, x);
        upd(tmp);
    }
    else if (deg[x] == 3) {
        vector<int> tmp = g[x];
        tmp.push_back(x);
        upd(tmp);
    }
    if (fail)
        return;
    if (deg[y] == 4) {
        vector<int> tmp(1, y);
        upd(tmp);
    }
    else if (deg[y] == 3) {
        vector<int> tmp = g[y];
        tmp.push_back(y);
        upd(tmp);
    }
    if (fail)
        return;
    if (find(x) == find(y)) {
        if (first) {
            first = false;
            dfs(x, -1);
            debug(ring);
            upd(ring);
        }
        else if (!v.empty() && find(v.back()) != find(x))
            fail = true;
    }
    else {
        rt[find(x)] = find(y);
    }
}

int CountCritical() {
    if (fail)
        return 0;
    if (v.empty())
        return n;
    return v.size();
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 2 ms 588 KB Output is correct
3 Correct 3 ms 588 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 588 KB Output is correct
6 Correct 2 ms 972 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 2 ms 588 KB Output is correct
10 Correct 2 ms 588 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 369 ms 33008 KB Output is correct
2 Correct 664 ms 50480 KB Output is correct
3 Correct 182 ms 32332 KB Output is correct
4 Correct 862 ms 62968 KB Output is correct
5 Correct 983 ms 64904 KB Output is correct
6 Correct 972 ms 107556 KB Output is correct
7 Correct 163 ms 32332 KB Output is correct
8 Correct 842 ms 59020 KB Output is correct
9 Correct 911 ms 62860 KB Output is correct
10 Correct 573 ms 61412 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 2 ms 588 KB Output is correct
3 Correct 3 ms 588 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 588 KB Output is correct
6 Correct 2 ms 972 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 2 ms 588 KB Output is correct
10 Correct 2 ms 588 KB Output is correct
11 Incorrect 2 ms 664 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 2 ms 588 KB Output is correct
3 Correct 3 ms 588 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 588 KB Output is correct
6 Correct 2 ms 972 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 2 ms 588 KB Output is correct
10 Correct 2 ms 588 KB Output is correct
11 Incorrect 2 ms 664 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #5
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 2 ms 588 KB Output is correct
3 Correct 3 ms 588 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 588 KB Output is correct
6 Correct 2 ms 972 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 2 ms 588 KB Output is correct
10 Correct 2 ms 588 KB Output is correct
11 Correct 369 ms 33008 KB Output is correct
12 Correct 664 ms 50480 KB Output is correct
13 Correct 182 ms 32332 KB Output is correct
14 Correct 862 ms 62968 KB Output is correct
15 Correct 983 ms 64904 KB Output is correct
16 Correct 972 ms 107556 KB Output is correct
17 Correct 163 ms 32332 KB Output is correct
18 Correct 842 ms 59020 KB Output is correct
19 Correct 911 ms 62860 KB Output is correct
20 Correct 573 ms 61412 KB Output is correct
21 Incorrect 2 ms 664 KB Output isn't correct
22 Halted 0 ms 0 KB -