oj.uz

Submission #483256

# Submission time Handle Problem Language Result Execution time Memory
483256 2021-10-28T11:15:16 Z syl123456 Parachute rings (IOI12_rings) C++17
37 / 100
 1144 ms 107660 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;
int n, _count;

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;
    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 (_count < 3000) {
            ++_count;
            dfs(x, -1);
            debug(ring);
            upd(ring);
            ring.clear();
            stk.clear();
            vis.assign(n, false);
        }
        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 2 ms 588 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 2 ms 588 KB Output is correct
6 Correct 3 ms 972 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 1 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 383 ms 32896 KB Output is correct
2 Correct 824 ms 50532 KB Output is correct
3 Correct 200 ms 32284 KB Output is correct
4 Correct 996 ms 63160 KB Output is correct
5 Correct 1136 ms 64996 KB Output is correct
6 Correct 1144 ms 107660 KB Output is correct
7 Correct 206 ms 32428 KB Output is correct
8 Correct 941 ms 59092 KB Output is correct
9 Correct 989 ms 62944 KB Output is correct
10 Correct 800 ms 61852 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 2 ms 588 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 2 ms 588 KB Output is correct
6 Correct 3 ms 972 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 1 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 3 ms 588 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 2 ms 588 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 2 ms 588 KB Output is correct
6 Correct 3 ms 972 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 1 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 3 ms 588 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 2 ms 588 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 2 ms 588 KB Output is correct
6 Correct 3 ms 972 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 1 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 383 ms 32896 KB Output is correct
12 Correct 824 ms 50532 KB Output is correct
13 Correct 200 ms 32284 KB Output is correct
14 Correct 996 ms 63160 KB Output is correct
15 Correct 1136 ms 64996 KB Output is correct
16 Correct 1144 ms 107660 KB Output is correct
17 Correct 206 ms 32428 KB Output is correct
18 Correct 941 ms 59092 KB Output is correct
19 Correct 989 ms 62944 KB Output is correct
20 Correct 800 ms 61852 KB Output is correct
21 Incorrect 3 ms 588 KB Output isn't correct
22 Halted 0 ms 0 KB -