oj.uz

Submission #1111303

# Submission time Handle Problem Language Result Execution time Memory
1111303 2024-11-12T02:38:37 Z lmToT27 Parachute rings (IOI12_rings) C++17
52 / 100
 4000 ms 49856 KB 
#include <bits/stdc++.h>
#define all(dataStructure) dataStructure.begin(),dataStructure.end()

typedef long long ll;

using namespace std;
namespace std {
        template <typename T, int D>
        struct _vector : public vector <_vector <T, D - 1>> {
                static_assert(D >= 1, "Dimension must be positive!");
                template <typename... Args>
                _vector(int n = 0, Args... args) : vector <_vector <T, D - 1>> (n, _vector <T, D - 1> (args...)) {}
        };
        // _vector <int, 3> a(n, m, k);: int a[n][m][k].
        // _vector <int, 3> a(n, m, k, x);: int a[n][m][k] initialized with x.
        template <typename T>
        struct _vector <T, 1> : public vector <T> {
                _vector(int n = 0, const T& val = T()) : vector <T> (n, val) {}
        };
}

const int MAX = 1e6 + 3;
const ll MOD[] = {1000000007, 998244353};

int n, q;
pair <int, int> eg[MAX];
int m;

struct graph_t { // graph G after deleting vertex "deleted"
        int valid; // checking whether graph G is perfect or not
        int deleted; // vertex we deleted from the graph
        int deg[MAX], pa[MAX];

        int findpa(int u) {
                return u == pa[u] ? u : pa[u] = findpa(pa[u]);
        }

        void join(int u, int v) {
                deg[u]++;
                deg[v]++;
                u = findpa(u);
                v = findpa(v);
                pa[v] = u;
        }

        void addEg(int u, int v) {
                if (!valid || u == deleted || v == deleted) return;
                if (deg[u] == 2 || deg[v] == 2 || findpa(u) == findpa(v)) return void(valid = 0); // graph must not contain cycle or with deg >= 3
                join(u, v);
        }

        graph_t(int chosen) {
                valid = 1;
                deleted = chosen;
                iota(pa, pa + n, 0);
                fill(deg, deg + n, 0);
                for (int i = 0; i < m; i++) addEg(eg[i].first, eg[i].second);
        }
};

vector <graph_t> subGraphs;

int pa[MAX], sz[MAX];
bool badGraph; // no solulu for this graph
int adj[MAX][3], deg[MAX];
int circleSize;

int findpa(int u) {
        return u == pa[u] ? u : pa[u] = findpa(pa[u]);
}

bool join(int u, int v) {
        u = findpa(u);
        v = findpa(v);
        if (u != v) {
                pa[v] = u;
                sz[u] += sz[v];
                return 1;
        }
        return 0;
}

void Init(int _n) {
        n = _n;
        iota(pa, pa + n, 0);
        fill(sz, sz + n, 1);
}

void Link(int u, int v) {
        if (badGraph) return;
        if (subGraphs.size()) {
                for (int i = 0; i < (int)subGraphs.size(); i++) subGraphs[i].addEg(u, v);
        } else {
                eg[m++] = make_pair(u, v);
                adj[u][deg[u]++] = v;
                adj[v][deg[v]++] = u;
                if (deg[u] < deg[v]) swap(u, v);
                if (deg[u] == 3) {
                        subGraphs.push_back(graph_t(u));
                        for (int i = 0; i < 3; ++i) {
                                subGraphs.push_back(graph_t(adj[u][i]));
                        }
                        return;
                }
                if (!join(u, v)) {
                        if (circleSize != 0) badGraph = 1;
                        else circleSize = sz[findpa(u)];
                }
        }
}

int CountCritical() {
        if (badGraph) return 0;
        if (subGraphs.size()) {
                int res = 0;
                for (int i = 0; i < (int)subGraphs.size(); i++) res += subGraphs[i].valid;
                return res;
        }
        if (circleSize) return circleSize;
        return n;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 8272 KB Output is correct
2 Correct 144 ms 47552 KB Output is correct
3 Correct 165 ms 47544 KB Output is correct
4 Correct 30 ms 8272 KB Output is correct
5 Correct 73 ms 8272 KB Output is correct
6 Correct 118 ms 8772 KB Output is correct
7 Correct 58 ms 47560 KB Output is correct
8 Correct 98 ms 8272 KB Output is correct
9 Correct 157 ms 47548 KB Output is correct
10 Correct 156 ms 47616 KB Output is correct

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4037 ms 22276 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 8272 KB Output is correct
2 Correct 144 ms 47552 KB Output is correct
3 Correct 165 ms 47544 KB Output is correct
4 Correct 30 ms 8272 KB Output is correct
5 Correct 73 ms 8272 KB Output is correct
6 Correct 118 ms 8772 KB Output is correct
7 Correct 58 ms 47560 KB Output is correct
8 Correct 98 ms 8272 KB Output is correct
9 Correct 157 ms 47548 KB Output is correct
10 Correct 156 ms 47616 KB Output is correct
11 Correct 153 ms 47552 KB Output is correct
12 Correct 272 ms 47808 KB Output is correct
13 Correct 274 ms 47736 KB Output is correct
14 Correct 195 ms 47552 KB Output is correct
15 Correct 192 ms 47556 KB Output is correct
16 Correct 231 ms 8540 KB Output is correct
17 Correct 269 ms 47772 KB Output is correct
18 Correct 272 ms 47932 KB Output is correct
19 Correct 231 ms 8700 KB Output is correct
20 Correct 263 ms 47768 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 8272 KB Output is correct
2 Correct 144 ms 47552 KB Output is correct
3 Correct 165 ms 47544 KB Output is correct
4 Correct 30 ms 8272 KB Output is correct
5 Correct 73 ms 8272 KB Output is correct
6 Correct 118 ms 8772 KB Output is correct
7 Correct 58 ms 47560 KB Output is correct
8 Correct 98 ms 8272 KB Output is correct
9 Correct 157 ms 47548 KB Output is correct
10 Correct 156 ms 47616 KB Output is correct
11 Correct 153 ms 47552 KB Output is correct
12 Correct 272 ms 47808 KB Output is correct
13 Correct 274 ms 47736 KB Output is correct
14 Correct 195 ms 47552 KB Output is correct
15 Correct 192 ms 47556 KB Output is correct
16 Correct 231 ms 8540 KB Output is correct
17 Correct 269 ms 47772 KB Output is correct
18 Correct 272 ms 47932 KB Output is correct
19 Correct 231 ms 8700 KB Output is correct
20 Correct 263 ms 47768 KB Output is correct
21 Correct 583 ms 10288 KB Output is correct
22 Correct 956 ms 11592 KB Output is correct
23 Correct 1254 ms 12104 KB Output is correct
24 Correct 1365 ms 48324 KB Output is correct
25 Correct 247 ms 48564 KB Output is correct
26 Correct 1608 ms 49612 KB Output is correct
27 Correct 1900 ms 11992 KB Output is correct
28 Correct 2023 ms 49604 KB Output is correct
29 Correct 753 ms 49856 KB Output is correct
30 Correct 2315 ms 12508 KB Output is correct

Subtask #5
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 8272 KB Output is correct
2 Correct 144 ms 47552 KB Output is correct
3 Correct 165 ms 47544 KB Output is correct
4 Correct 30 ms 8272 KB Output is correct
5 Correct 73 ms 8272 KB Output is correct
6 Correct 118 ms 8772 KB Output is correct
7 Correct 58 ms 47560 KB Output is correct
8 Correct 98 ms 8272 KB Output is correct
9 Correct 157 ms 47548 KB Output is correct
10 Correct 156 ms 47616 KB Output is correct
11 Execution timed out 4037 ms 22276 KB Time limit exceeded
12 Halted 0 ms 0 KB -