oj.uz

Submission #483258

# Submission time Handle Problem Language Result Execution time Memory
483258 2021-10-28T11:16:32 Z syl123456 Parachute rings (IOI12_rings) C++17
37 / 100
 1094 ms 107476 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 < 30000) {
            ++_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 1 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 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 3 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 341 ms 32964 KB Output is correct
2 Correct 770 ms 50360 KB Output is correct
3 Correct 187 ms 32220 KB Output is correct
4 Correct 965 ms 63012 KB Output is correct
5 Correct 1094 ms 64848 KB Output is correct
6 Correct 1066 ms 107476 KB Output is correct
7 Correct 175 ms 32268 KB Output is correct
8 Correct 906 ms 58872 KB Output is correct
9 Correct 921 ms 62844 KB Output is correct
10 Correct 717 ms 61724 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 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 3 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 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 1 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 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 3 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 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 1 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 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 3 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 341 ms 32964 KB Output is correct
12 Correct 770 ms 50360 KB Output is correct
13 Correct 187 ms 32220 KB Output is correct
14 Correct 965 ms 63012 KB Output is correct
15 Correct 1094 ms 64848 KB Output is correct
16 Correct 1066 ms 107476 KB Output is correct
17 Correct 175 ms 32268 KB Output is correct
18 Correct 906 ms 58872 KB Output is correct
19 Correct 921 ms 62844 KB Output is correct
20 Correct 717 ms 61724 KB Output is correct
21 Incorrect 2 ms 588 KB Output isn't correct
22 Halted 0 ms 0 KB -