Submission #594038

#	Time	Username	Problem	Language	Result	Execution time	Memory
594038		skittles1412	Parachute rings (IOI12_rings)	C++17	20 / 100	4046 ms	844 KiB

rings

#include "bits/extc++.h"

using namespace std;

template <typename T>
void dbgh(const T& t) {
    cerr << t << endl;
}

template <typename T, typename... U>
void dbgh(const T& t, const U&... u) {
    cerr << t << " | ";
    dbgh(u...);
}

#ifdef DEBUG
#define dbg(...)                                              \
    cerr << "L" << __LINE__ << " [" << #__VA_ARGS__ << "]: "; \
    dbgh(__VA_ARGS__);
#else
#define dbg(...)
#define cerr   \
    if (false) \
    cerr
#endif

#define endl "\n"
#define long int64_t
#define sz(x) int((x).size())

const int maxn = 5e3 + 5;

int n, ign;
bool bad, vis[maxn];
vector<int> graph[maxn];

void dfs(int u, int p = -1) {
    if (vis[u]) {
        bad = true;
        return;
    }
    vis[u] = true;
    for (auto& v : graph[u]) {
        if (v != p && v != ign) {
            dfs(v, u);
        }
    }
}

void Init(int _n) {
    n = _n;
}

void Link(int u, int v) {
    graph[u].push_back(v);
    graph[v].push_back(u);
}

int CountCritical() {
    int ans = 0;
    for (int i = 0; i < n; i++) {
        ign = i;
        bad = false;
        memset(vis, 0, sizeof(vis));
        for (int j = 0; j < n; j++) {
            if (j != i && !vis[j]) {
                dfs(j);
            }
        }
        int deg[n];
        for (int j = 0; j < n; j++) {
            deg[j] = sz(graph[j]);
        }
        for (auto& a : graph[i]) {
            deg[a]--;
        }
        deg[i] = 0;
        if (*max_element(deg, deg + n) <= 2 && !bad) {
            ans++;
        } else {
            dbg(i, bad);
        }
    }
    return ans;
}

• Subtask 1: 20 / 20
• Subtask 2: 0 / 17
• Subtask 3: 0 / 18
• Subtask 4: 0 / 14
• Subtask 5: 0 / 31