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Submission #967237

# Submission time Handle Problem Language Result Execution time Memory
967237 2024-04-21T14:45:28 Z vjudge1 Alternating Heights (CCO22_day1problem1) C++17
25 / 25
 577 ms 9604 KB 
#include<bits/stdc++.h>

using namespace std;

int n,k,q, arr[3030], vis[3030], ans[3030], ck;
vector<int> vc[3030];

int check(int u){
    vis[u] = 1;
    for (int v : vc[u]) if(vis[v] == 1 || !vis[v] && check(v)) return 1;
    vis[u] = 2;
    return 0;
}

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    cin >> n >> k >> q;
    for(int i = 1; i<=n; ++i) cin >> arr[i];
    for(int i = 1; i<=n; ++i){
        int l = i, r = n;
        ans[i] = i;
        while(l <= r){
            int mid = (l + r) >> 1, ck = 1;
            memset(vis, 0, sizeof(vis));
            for(int j = 1; j<=k; ++j) vc[j].clear();
            for(int j = i; j<mid; ++j){
                if(j&1) vc[arr[j+1]].push_back(arr[j]);
                else vc[arr[j]].push_back(arr[j+1]);
            }
            for(int j = i; j<=mid; ++j){
                if(!vis[arr[j]] && check(arr[j])){
                    ck = 0;
                    break;
                }
            }
            if(ck){
                ans[i] = mid;
                l = mid+1;
            }
            else r = mid - 1;
        }
    }
    while(q--){
        int l, r; cin >> l >> r;
        if(ans[l] >= r) {
            cout << "YES\n";
        } else {
            cout << "NO\n";
        }
    }
}

Compilation message

Main.cpp: In function 'int check(int)':
Main.cpp:10:51: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   10 |     for (int v : vc[u]) if(vis[v] == 1 || !vis[v] && check(v)) return 1;
      |                                           ~~~~~~~~^~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 138 ms 8780 KB Output is correct
2 Correct 138 ms 8628 KB Output is correct
3 Correct 139 ms 8464 KB Output is correct
4 Correct 95 ms 5712 KB Output is correct
5 Correct 108 ms 6984 KB Output is correct
6 Correct 141 ms 8688 KB Output is correct
7 Correct 140 ms 8528 KB Output is correct
8 Correct 145 ms 8736 KB Output is correct
9 Correct 156 ms 8756 KB Output is correct
10 Correct 206 ms 9040 KB Output is correct
11 Correct 306 ms 9604 KB Output is correct
12 Correct 288 ms 9280 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 111 ms 7780 KB Output is correct
2 Correct 113 ms 7760 KB Output is correct
3 Correct 114 ms 7952 KB Output is correct
4 Correct 94 ms 6728 KB Output is correct
5 Correct 104 ms 6996 KB Output is correct
6 Correct 112 ms 7824 KB Output is correct
7 Correct 112 ms 7992 KB Output is correct
8 Correct 114 ms 7768 KB Output is correct
9 Correct 121 ms 8124 KB Output is correct
10 Correct 116 ms 8880 KB Output is correct
11 Correct 117 ms 8728 KB Output is correct
12 Correct 0 ms 344 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 600 KB Output is correct
2 Correct 162 ms 604 KB Output is correct
3 Correct 199 ms 1104 KB Output is correct
4 Correct 16 ms 604 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 122 ms 604 KB Output is correct
8 Correct 234 ms 600 KB Output is correct
9 Correct 323 ms 600 KB Output is correct
10 Correct 382 ms 804 KB Output is correct
11 Correct 453 ms 612 KB Output is correct
12 Correct 330 ms 600 KB Output is correct

Subtask #4
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 138 ms 8780 KB Output is correct
2 Correct 138 ms 8628 KB Output is correct
3 Correct 139 ms 8464 KB Output is correct
4 Correct 95 ms 5712 KB Output is correct
5 Correct 108 ms 6984 KB Output is correct
6 Correct 141 ms 8688 KB Output is correct
7 Correct 140 ms 8528 KB Output is correct
8 Correct 145 ms 8736 KB Output is correct
9 Correct 156 ms 8756 KB Output is correct
10 Correct 206 ms 9040 KB Output is correct
11 Correct 306 ms 9604 KB Output is correct
12 Correct 288 ms 9280 KB Output is correct
13 Correct 111 ms 7780 KB Output is correct
14 Correct 113 ms 7760 KB Output is correct
15 Correct 114 ms 7952 KB Output is correct
16 Correct 94 ms 6728 KB Output is correct
17 Correct 104 ms 6996 KB Output is correct
18 Correct 112 ms 7824 KB Output is correct
19 Correct 112 ms 7992 KB Output is correct
20 Correct 114 ms 7768 KB Output is correct
21 Correct 121 ms 8124 KB Output is correct
22 Correct 116 ms 8880 KB Output is correct
23 Correct 117 ms 8728 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 0 ms 600 KB Output is correct
26 Correct 162 ms 604 KB Output is correct
27 Correct 199 ms 1104 KB Output is correct
28 Correct 16 ms 604 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 122 ms 604 KB Output is correct
32 Correct 234 ms 600 KB Output is correct
33 Correct 323 ms 600 KB Output is correct
34 Correct 382 ms 804 KB Output is correct
35 Correct 453 ms 612 KB Output is correct
36 Correct 330 ms 600 KB Output is correct
37 Correct 334 ms 9304 KB Output is correct
38 Correct 296 ms 9056 KB Output is correct
39 Correct 140 ms 8516 KB Output is correct
40 Correct 96 ms 6740 KB Output is correct
41 Correct 110 ms 7252 KB Output is correct
42 Correct 284 ms 6480 KB Output is correct
43 Correct 407 ms 4432 KB Output is correct
44 Correct 252 ms 4180 KB Output is correct
45 Correct 577 ms 4404 KB Output is correct
46 Correct 534 ms 4432 KB Output is correct
47 Correct 554 ms 4492 KB Output is correct