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Submission #491372

# Submission time Handle Problem Language Result Execution time Memory
491372 2021-12-01T17:57:32 Z qwerasdfzxcl Simurgh (IOI17_simurgh) C++14
51 / 100
 425 ms 12544 KB 
#include "simurgh.h"
#include <bits/stdc++.h>
 
using namespace std;
typedef long long ll;
const int INF = 1e9;
struct DSU{
    int path[505];
    void init(int n){for (int i=0;i<=n;i++) path[i] = i;}
    int find(int s){
        if (path[s]==s) return s;
        return path[s] = find(path[s]);
    }
    bool merge(int s, int v){
        int x = find(s), y = find(v);
        if (x==y) return 0;
        path[x] = y;
        return 1;
    }
}dsu;
int adj[505][505], n, val[250250], dfs_chk[250250], cntq;
bool visited[505];
vector<int> U, V, DV, E, F, adj2[505];
 
void dfs(int s){
    visited[s] = 1;
    for (int i=0;i<n;i++) if (!visited[i] && adj[s][i]!=-1){
        DV.push_back(adj[s][i]);
        dfs_chk[adj[s][i]] = 1;
        adj2[s].push_back(i);
        adj2[i].push_back(s);
        dfs(i);
    }
}
 
bool find_path(int s, int e){
    if (s==e) return 1;
    visited[s] = 1;
    for (auto &v:adj2[s]) if (!visited[v]){
        E.push_back(adj[s][v]);
        if (find_path(v, e)) return 1;
        E.pop_back();
    }
    return 0;
}
 
int calc(int p, int l, int r){
    if (l>r) return 0;
    //printf("calc: %d %d %d\n", p, l, r);
    dsu.init(n);
    vector<int> Q;
    for (int i=l;i<=r;i++) if (adj[p][i]!=-1){
        Q.push_back(adj[p][i]);
        dsu.merge(p, i);
    }
 
    int cnt = 0;
    for (auto &t:DV) if (dsu.merge(U[t], V[t])){
        Q.push_back(t);
        if (val[t]==1) cnt++;
    }
    cntq++;
    assert(cntq<=n*12);
 
    return count_common_roads(Q) - cnt;
}
 
std::vector<int> find_roads(int N, std::vector<int> u, std::vector<int> v) {
    cntq = 0;
    if (N==2) return {0};
    n = N;
    U = u, V = v;
    fill(adj[0], adj[504]+505, -1);
    for (int i=0;i<(int)u.size();i++){
        adj[u[i]][v[i]] = i;
        adj[v[i]][u[i]] = i;
    }
 
    fill(val, val+250250, -1);
    fill(dfs_chk, dfs_chk+250250, 0);
    fill(visited, visited+505, 0);
    DV.clear();
    for (int i=0;i<505;i++) adj2[i].clear();
    dfs(0);
    int cnt0 = count_common_roads(DV);
    //for (auto &x:DV) printf("%d ", x);
    //printf("\n");
    cntq++;
 
    for (int i=0;i<(int)u.size();i++) if (!dfs_chk[i]){
        E.clear();
        F.clear();
        fill(visited, visited+n, 0);
        assert(find_path(u[i], v[i]));
        //printf("%d: ", i);
        //for (auto &x:E) printf("%d ", x);
        //printf("\n");
 
        bool flag = 0, flag2 = 0;;
        for (auto &t:E) if (val[t]!=-1) flag = 1;
        for (auto &t:E) if (val[t]==-1) flag2 = 1;
        if (!flag2) continue;
 
        vector<int> Q = DV;
        int flag3 = -1, val2 = -1;
        int prvE = i;
        for (auto &t:E){
            if (flag3!=-1 && val[t]!=-1) {F.push_back(INF); continue;}
            for (auto iter = Q.begin();iter!=Q.end();iter++) if (*iter==t) {Q.erase(iter); break;}
            Q.push_back(prvE);
            F.push_back(count_common_roads(Q));
            cntq++;
            assert(cntq<=n*12);
            prvE = t;
 
            if (val[t]!=-1) flag3 = t, val2 = F.back();
        }
 
        if (!flag){
            int mn = min(*min_element(F.begin(), F.end()), cnt0);
            int mx = max(*max_element(F.begin(), F.end()), cnt0);
            for (int i=0;i<(int)F.size();i++){
                if (mn==mx) val[E[i]] = 0;
                else if (F[i]==mn) val[E[i]] = 1;
                else val[E[i]] = 0;
            }
        }
        else{
            assert(flag3!=-1);
            if (val[flag3]==0) val2--;
            //printf(" %d %d\n", flag3, val2);
 
            for (int i=0;i<(int)F.size();i++){
                //printf(" %d", F[i]);
                if (F[i]==val2) val[E[i]] = 1;
                else if (F[i]!=INF) val[E[i]] = 0;
            }
        }
        //for (int i=0;i<(int)u.size();i++) printf("%d ", val[i]);
        //printf("\n");
    }
    //printf("YES\n");
 
    for (int i=0;i<(int)DV.size();i++) if (val[DV[i]]==-1) val[DV[i]] = 1;
    //for (int i=0;i<(int)u.size();i++) printf("%d ", val[i]);
    //printf("\n");
 
    vector<int> ans;
 
    for (int i=0;i<n;i++){
        int prv = i;
        while(calc(i, prv+1, n-1) > 0){
            //printf(" %d %d\n", i, prv);
            int l = prv+1, r = n-1;
            while(r-l > 0){
                int m = (l+r)>>1;
                if (calc(i, l, m) > 0) r = m;
                else l = m+1;
            }
            ans.push_back(adj[i][l]);
            prv = l;
        }
    }
    //printf("ans: ");
    //for (auto &x:ans) printf("%d ", x);
    //printf("\n");
 
    //printf("YES:simurgh\n");
 
    if ((int)ans.size()!=n-1) exit(1);
    assert(count_common_roads(ans)==n-1);
    //printf("%d\n", cntq);
    assert(cntq<=5500);
 
    return ans;
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3148 KB correct
2 Correct 2 ms 3148 KB correct
3 Correct 1 ms 3148 KB correct
4 Correct 1 ms 3148 KB correct
5 Correct 1 ms 3148 KB correct
6 Correct 1 ms 3148 KB correct
7 Correct 0 ms 204 KB correct
8 Correct 2 ms 3148 KB correct
9 Correct 1 ms 3148 KB correct
10 Correct 1 ms 3148 KB correct
11 Correct 1 ms 3148 KB correct
12 Correct 2 ms 3148 KB correct
13 Correct 2 ms 3148 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3148 KB correct
2 Correct 2 ms 3148 KB correct
3 Correct 1 ms 3148 KB correct
4 Correct 1 ms 3148 KB correct
5 Correct 1 ms 3148 KB correct
6 Correct 1 ms 3148 KB correct
7 Correct 0 ms 204 KB correct
8 Correct 2 ms 3148 KB correct
9 Correct 1 ms 3148 KB correct
10 Correct 1 ms 3148 KB correct
11 Correct 1 ms 3148 KB correct
12 Correct 2 ms 3148 KB correct
13 Correct 2 ms 3148 KB correct
14 Correct 3 ms 3276 KB correct
15 Correct 2 ms 3276 KB correct
16 Correct 3 ms 3276 KB correct
17 Correct 3 ms 3276 KB correct
18 Correct 2 ms 3276 KB correct
19 Correct 3 ms 3276 KB correct
20 Correct 3 ms 3276 KB correct
21 Correct 3 ms 3276 KB correct
22 Correct 2 ms 3276 KB correct
23 Correct 3 ms 3276 KB correct
24 Correct 3 ms 3276 KB correct
25 Correct 2 ms 3148 KB correct
26 Correct 2 ms 3276 KB correct
27 Correct 2 ms 3276 KB correct
28 Correct 3 ms 3276 KB correct
29 Correct 2 ms 3276 KB correct
30 Correct 3 ms 3276 KB correct
31 Correct 2 ms 3276 KB correct
32 Correct 2 ms 3280 KB correct
33 Correct 3 ms 3276 KB correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3148 KB correct
2 Correct 2 ms 3148 KB correct
3 Correct 1 ms 3148 KB correct
4 Correct 1 ms 3148 KB correct
5 Correct 1 ms 3148 KB correct
6 Correct 1 ms 3148 KB correct
7 Correct 0 ms 204 KB correct
8 Correct 2 ms 3148 KB correct
9 Correct 1 ms 3148 KB correct
10 Correct 1 ms 3148 KB correct
11 Correct 1 ms 3148 KB correct
12 Correct 2 ms 3148 KB correct
13 Correct 2 ms 3148 KB correct
14 Correct 3 ms 3276 KB correct
15 Correct 2 ms 3276 KB correct
16 Correct 3 ms 3276 KB correct
17 Correct 3 ms 3276 KB correct
18 Correct 2 ms 3276 KB correct
19 Correct 3 ms 3276 KB correct
20 Correct 3 ms 3276 KB correct
21 Correct 3 ms 3276 KB correct
22 Correct 2 ms 3276 KB correct
23 Correct 3 ms 3276 KB correct
24 Correct 3 ms 3276 KB correct
25 Correct 2 ms 3148 KB correct
26 Correct 2 ms 3276 KB correct
27 Correct 2 ms 3276 KB correct
28 Correct 3 ms 3276 KB correct
29 Correct 2 ms 3276 KB correct
30 Correct 3 ms 3276 KB correct
31 Correct 2 ms 3276 KB correct
32 Correct 2 ms 3280 KB correct
33 Correct 3 ms 3276 KB correct
34 Correct 59 ms 3916 KB correct
35 Correct 57 ms 3916 KB correct
36 Correct 50 ms 3732 KB correct
37 Correct 22 ms 3276 KB correct
38 Correct 60 ms 3916 KB correct
39 Correct 55 ms 3788 KB correct
40 Correct 49 ms 3660 KB correct
41 Correct 57 ms 3948 KB correct
42 Correct 63 ms 3968 KB correct
43 Correct 40 ms 3640 KB correct
44 Correct 37 ms 3568 KB correct
45 Correct 42 ms 3624 KB correct
46 Correct 35 ms 3532 KB correct
47 Correct 27 ms 3392 KB correct
48 Correct 18 ms 3276 KB correct
49 Correct 20 ms 3316 KB correct
50 Correct 28 ms 3396 KB correct
51 Correct 38 ms 3616 KB correct
52 Correct 35 ms 3580 KB correct
53 Correct 35 ms 3536 KB correct
54 Correct 45 ms 3632 KB correct
55 Correct 41 ms 3632 KB correct
56 Correct 42 ms 3532 KB correct
57 Correct 42 ms 3532 KB correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB correct
2 Correct 2 ms 3148 KB correct
3 Correct 239 ms 5196 KB correct
4 Correct 421 ms 6276 KB correct
5 Runtime error 425 ms 12544 KB Execution killed with signal 6
6 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3148 KB correct
2 Correct 2 ms 3148 KB correct
3 Correct 1 ms 3148 KB correct
4 Correct 1 ms 3148 KB correct
5 Correct 1 ms 3148 KB correct
6 Correct 1 ms 3148 KB correct
7 Correct 0 ms 204 KB correct
8 Correct 2 ms 3148 KB correct
9 Correct 1 ms 3148 KB correct
10 Correct 1 ms 3148 KB correct
11 Correct 1 ms 3148 KB correct
12 Correct 2 ms 3148 KB correct
13 Correct 2 ms 3148 KB correct
14 Correct 3 ms 3276 KB correct
15 Correct 2 ms 3276 KB correct
16 Correct 3 ms 3276 KB correct
17 Correct 3 ms 3276 KB correct
18 Correct 2 ms 3276 KB correct
19 Correct 3 ms 3276 KB correct
20 Correct 3 ms 3276 KB correct
21 Correct 3 ms 3276 KB correct
22 Correct 2 ms 3276 KB correct
23 Correct 3 ms 3276 KB correct
24 Correct 3 ms 3276 KB correct
25 Correct 2 ms 3148 KB correct
26 Correct 2 ms 3276 KB correct
27 Correct 2 ms 3276 KB correct
28 Correct 3 ms 3276 KB correct
29 Correct 2 ms 3276 KB correct
30 Correct 3 ms 3276 KB correct
31 Correct 2 ms 3276 KB correct
32 Correct 2 ms 3280 KB correct
33 Correct 3 ms 3276 KB correct
34 Correct 59 ms 3916 KB correct
35 Correct 57 ms 3916 KB correct
36 Correct 50 ms 3732 KB correct
37 Correct 22 ms 3276 KB correct
38 Correct 60 ms 3916 KB correct
39 Correct 55 ms 3788 KB correct
40 Correct 49 ms 3660 KB correct
41 Correct 57 ms 3948 KB correct
42 Correct 63 ms 3968 KB correct
43 Correct 40 ms 3640 KB correct
44 Correct 37 ms 3568 KB correct
45 Correct 42 ms 3624 KB correct
46 Correct 35 ms 3532 KB correct
47 Correct 27 ms 3392 KB correct
48 Correct 18 ms 3276 KB correct
49 Correct 20 ms 3316 KB correct
50 Correct 28 ms 3396 KB correct
51 Correct 38 ms 3616 KB correct
52 Correct 35 ms 3580 KB correct
53 Correct 35 ms 3536 KB correct
54 Correct 45 ms 3632 KB correct
55 Correct 41 ms 3632 KB correct
56 Correct 42 ms 3532 KB correct
57 Correct 42 ms 3532 KB correct
58 Correct 0 ms 204 KB correct
59 Correct 2 ms 3148 KB correct
60 Correct 239 ms 5196 KB correct
61 Correct 421 ms 6276 KB correct
62 Runtime error 425 ms 12544 KB Execution killed with signal 6
63 Halted 0 ms 0 KB -