oj.uz

Submission #879666

# Submission time Handle Problem Language Result Execution time Memory
879666 2023-11-27T21:34:28 Z Giselus Passport (JOI23_passport) C++17
100 / 100
 646 ms 116752 KB 
#include<cstdio>
#include<algorithm>
#include<vector>
#include<queue>
#include<deque>
#define S 262144

using namespace std;

vector<pair<int,int>> V[4*S]; 

bool vis[4*S][3];
int dist[4*S][3];
void BFS(int x, int t){
    deque<pair<int,int>> q;
    q.push_front({x,0});
    while(!q.empty()){
        int v = q.front().first;
        int d = q.front().second;
        q.pop_front();
        if(vis[v][t])
            continue;
        vis[v][t] = 1;
        dist[v][t] = d;
        for(int i = 0; i < V[v].size(); i++){
            int u = V[v][i].first;
            int d2 = V[v][i].second;
            if(d2 == 0){
                q.push_front({u,d});
            }else{
                q.push_back({u,d+1});
            }
        }
    }
}

void addEdge(int l, int r, int ll, int rr, int w, int v){
    if(l > rr || r < ll)
        return;
    if(l >= ll && r <= rr){
        V[w].push_back({v,1});
        return;
    }
    int sr = (l+r)/2;
    addEdge(l,sr,ll,rr,w*2,v);
    addEdge(sr+1,r,ll,rr,w*2+1,v);
}

int ans[S];

int tree[4*S];

void sett(int w, int x){
    w = w+S-1;
    while(w != 0){
        tree[w] = min(tree[w], x);
        w /= 2;
    }
}

int getMin(int l, int r, int ll, int rr, int w){
    if(l > rr || r < ll)
        return 1e9;
    if(l >= ll && r <= rr){
        return tree[w];
    }
    int sr = (l+r)/2;
    return min(getMin(l,sr,ll,rr,w*2), getMin(sr+1,r,ll,rr,w*2+1));
}
int L[S];
int R[S];
int main(void){
    for(int i = 2; i < 2*S; i++){
        V[i].push_back({i/2,0});
    }
    int n;
    scanf("%d",&n);
    for(int i = 1; i <= n; i++){
        int l, r;
        scanf("%d %d",&l,&r);
        L[i] = l;
        R[i] = r;
        addEdge(1,S,l,r,1,2*S+i);
    }
    for(int i = 1; i <= n; i++){
        V[2*S+i].push_back({i+S-1,0});
    }
    BFS(2*S+1,1);
    BFS(2*S+n,2);
    dist[2*S+1][1] = 1;
    dist[2*S+n][2] = 1;
    
    for(int i = 1; i < 2*S;i++){
        tree[i] = 1e9;
    }

    vector<pair<int,int>> P;
    for(int i = 1; i <= n; i++){
        if(!vis[2*S+i][1] || !vis[2*S+i][2]){
            ans[i] = 1e9;
        }else{
            ans[i] = dist[2*S+i][1] + dist[2*S+i][2] - 1;
        }
        sett(i, ans[i]);
        if(ans[i] < 1e8)
            P.push_back({ans[i], i});
    }
    sort(P.begin(), P.end());
    for(int i = 0; i < P.size(); i++){
        int v = P[i].second;
        // printf("%d %d*\n",v,ans[v]);
        ans[v] = min(ans[v], 1 + getMin(1,S,L[v], R[v], 1));
        sett(v,ans[v]);
        // printf("%d %d$\n",v, ans[v]);
    }

    int q;
    scanf("%d", &q);
    for(int i = 1; i <= q; i++){
        int x;
        scanf("%d", &x);
        if(ans[x] >= 1e8)
            ans[x] = -1;
        printf("%d\n",ans[x]);
    }
    // for(int i = 1; i <= n; i++){
    //     printf("%d %d\n", dist[2*S+i][1], dist[2*S+i][2]);
    // }

    return 0;
}

Compilation message

passport.cpp: In function 'void BFS(int, int)':
passport.cpp:25:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |         for(int i = 0; i < V[v].size(); i++){
      |                        ~~^~~~~~~~~~~~~
passport.cpp: In function 'int main()':
passport.cpp:109:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  109 |     for(int i = 0; i < P.size(); i++){
      |                    ~~^~~~~~~~~~
passport.cpp:77:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   77 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
passport.cpp:80:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   80 |         scanf("%d %d",&l,&r);
      |         ~~~~~^~~~~~~~~~~~~~~
passport.cpp:118:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  118 |     scanf("%d", &q);
      |     ~~~~~^~~~~~~~~~
passport.cpp:121:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  121 |         scanf("%d", &x);
      |         ~~~~~^~~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 54836 KB Output is correct
2 Correct 26 ms 54620 KB Output is correct
3 Correct 26 ms 54620 KB Output is correct
4 Correct 605 ms 115044 KB Output is correct
5 Correct 237 ms 78708 KB Output is correct
6 Correct 153 ms 73672 KB Output is correct
7 Correct 166 ms 97832 KB Output is correct
8 Correct 125 ms 90620 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 54612 KB Output is correct
2 Correct 27 ms 54608 KB Output is correct
3 Correct 27 ms 54868 KB Output is correct
4 Correct 27 ms 54612 KB Output is correct
5 Correct 26 ms 54620 KB Output is correct
6 Correct 27 ms 54620 KB Output is correct
7 Correct 27 ms 54620 KB Output is correct
8 Correct 26 ms 54608 KB Output is correct
9 Correct 30 ms 54616 KB Output is correct
10 Correct 26 ms 54804 KB Output is correct
11 Correct 26 ms 54716 KB Output is correct
12 Correct 30 ms 54876 KB Output is correct
13 Correct 28 ms 54692 KB Output is correct
14 Correct 27 ms 54864 KB Output is correct
15 Correct 28 ms 54876 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 54612 KB Output is correct
2 Correct 27 ms 54608 KB Output is correct
3 Correct 27 ms 54868 KB Output is correct
4 Correct 27 ms 54612 KB Output is correct
5 Correct 26 ms 54620 KB Output is correct
6 Correct 27 ms 54620 KB Output is correct
7 Correct 27 ms 54620 KB Output is correct
8 Correct 26 ms 54608 KB Output is correct
9 Correct 30 ms 54616 KB Output is correct
10 Correct 26 ms 54804 KB Output is correct
11 Correct 26 ms 54716 KB Output is correct
12 Correct 30 ms 54876 KB Output is correct
13 Correct 28 ms 54692 KB Output is correct
14 Correct 27 ms 54864 KB Output is correct
15 Correct 28 ms 54876 KB Output is correct
16 Correct 29 ms 55220 KB Output is correct
17 Correct 29 ms 54864 KB Output is correct
18 Correct 32 ms 55124 KB Output is correct
19 Correct 29 ms 55292 KB Output is correct
20 Correct 28 ms 54876 KB Output is correct
21 Correct 28 ms 54864 KB Output is correct
22 Correct 37 ms 55120 KB Output is correct
23 Correct 28 ms 55324 KB Output is correct
24 Correct 29 ms 55132 KB Output is correct

Subtask #4
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 54612 KB Output is correct
2 Correct 27 ms 54608 KB Output is correct
3 Correct 27 ms 54868 KB Output is correct
4 Correct 27 ms 54612 KB Output is correct
5 Correct 26 ms 54620 KB Output is correct
6 Correct 27 ms 54620 KB Output is correct
7 Correct 27 ms 54620 KB Output is correct
8 Correct 26 ms 54608 KB Output is correct
9 Correct 30 ms 54616 KB Output is correct
10 Correct 26 ms 54804 KB Output is correct
11 Correct 26 ms 54716 KB Output is correct
12 Correct 30 ms 54876 KB Output is correct
13 Correct 28 ms 54692 KB Output is correct
14 Correct 27 ms 54864 KB Output is correct
15 Correct 28 ms 54876 KB Output is correct
16 Correct 29 ms 55220 KB Output is correct
17 Correct 29 ms 54864 KB Output is correct
18 Correct 32 ms 55124 KB Output is correct
19 Correct 29 ms 55292 KB Output is correct
20 Correct 28 ms 54876 KB Output is correct
21 Correct 28 ms 54864 KB Output is correct
22 Correct 37 ms 55120 KB Output is correct
23 Correct 28 ms 55324 KB Output is correct
24 Correct 29 ms 55132 KB Output is correct
25 Correct 26 ms 54620 KB Output is correct
26 Correct 33 ms 54784 KB Output is correct
27 Correct 30 ms 55004 KB Output is correct
28 Correct 29 ms 54876 KB Output is correct
29 Correct 29 ms 54872 KB Output is correct
30 Correct 29 ms 55076 KB Output is correct
31 Correct 29 ms 55032 KB Output is correct

Subtask #5
46.0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 54836 KB Output is correct
2 Correct 26 ms 54620 KB Output is correct
3 Correct 26 ms 54620 KB Output is correct
4 Correct 605 ms 115044 KB Output is correct
5 Correct 237 ms 78708 KB Output is correct
6 Correct 153 ms 73672 KB Output is correct
7 Correct 166 ms 97832 KB Output is correct
8 Correct 125 ms 90620 KB Output is correct
9 Correct 30 ms 54612 KB Output is correct
10 Correct 27 ms 54608 KB Output is correct
11 Correct 27 ms 54868 KB Output is correct
12 Correct 27 ms 54612 KB Output is correct
13 Correct 26 ms 54620 KB Output is correct
14 Correct 27 ms 54620 KB Output is correct
15 Correct 27 ms 54620 KB Output is correct
16 Correct 26 ms 54608 KB Output is correct
17 Correct 30 ms 54616 KB Output is correct
18 Correct 26 ms 54804 KB Output is correct
19 Correct 26 ms 54716 KB Output is correct
20 Correct 30 ms 54876 KB Output is correct
21 Correct 28 ms 54692 KB Output is correct
22 Correct 27 ms 54864 KB Output is correct
23 Correct 28 ms 54876 KB Output is correct
24 Correct 29 ms 55220 KB Output is correct
25 Correct 29 ms 54864 KB Output is correct
26 Correct 32 ms 55124 KB Output is correct
27 Correct 29 ms 55292 KB Output is correct
28 Correct 28 ms 54876 KB Output is correct
29 Correct 28 ms 54864 KB Output is correct
30 Correct 37 ms 55120 KB Output is correct
31 Correct 28 ms 55324 KB Output is correct
32 Correct 29 ms 55132 KB Output is correct
33 Correct 26 ms 54620 KB Output is correct
34 Correct 33 ms 54784 KB Output is correct
35 Correct 30 ms 55004 KB Output is correct
36 Correct 29 ms 54876 KB Output is correct
37 Correct 29 ms 54872 KB Output is correct
38 Correct 29 ms 55076 KB Output is correct
39 Correct 29 ms 55032 KB Output is correct
40 Correct 646 ms 116752 KB Output is correct
41 Correct 273 ms 80832 KB Output is correct
42 Correct 403 ms 106536 KB Output is correct
43 Correct 382 ms 109100 KB Output is correct
44 Correct 187 ms 76048 KB Output is correct
45 Correct 225 ms 80928 KB Output is correct
46 Correct 116 ms 65180 KB Output is correct
47 Correct 274 ms 95060 KB Output is correct
48 Correct 293 ms 89724 KB Output is correct