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Submission #638574

# Submission time Handle Problem Language Result Execution time Memory
638574 2022-09-06T12:12:08 Z morasha3 Alternating Heights (CCO22_day1problem1) C++17
6 / 25
 1000 ms 4400 KB 
#include <bits/stdc++.h>
using namespace std;
typedef int ll;
typedef   double ld;
const ll mod=1e9+7;
#define endl '\n'
ll n,k,q,arr[3007];
bool dfs(vector<vector<int>>& v)
{
    int n = v.size();
    vector<int> deg(n);
    for (int a = 0; a < n; a++)
        for (int b : v[a])
            deg[b]++;

    vector<int> q;
    q.reserve(n);
    for (int i = 0; i < n; i++)
        if (deg[i] == 0)
            q.push_back(i);
    for (int rep = 0; rep < q.size(); rep++)
    {
        int c = q[rep];
        for (auto nxt : v[c])
        {
            deg[nxt]--;
            if (deg[nxt] == 0)
                q.push_back(nxt);
        }
    }
    return n>q.size();
}


int32_t main()
{
    //freopen("jumping.in","r",stdin);
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin>>n>>k>>q;
    for(int i=0; i<n; i++)
        cin>>arr[i];
    ll m[n];
    for(int i=0; i<n; i++)
        m[i]=i;
    for(int h:{0,1})
    {
        for(int i=h; i<n; i+=2)
        {
            ll r=i+1,c=0;
            while(r<n)
            {
                vector<vector<ll>>adj(k);
                for(int j=i; j<r; j++)
                {
                    if (j % 2 == i % 2)
                        adj[arr[j]-1].push_back(arr[j + 1]-1);
                    else
                        adj[arr[j + 1]-1].push_back(arr[j]-1);
                }

                if(dfs(adj))
                    break;
                r++;
            }
            m[i]=r-1;
        }
    }
    while(q--)
    {
        ll a,b;
        cin>>a>>b;
        a--,b--;
        if(m[a]>=b)
            cout<<"YES"<<endl;
        else
            cout<<"NO"<<endl;
    }

    return 0;

}

Compilation message

Main.cpp: In function 'bool dfs(std::vector<std::vector<int> >&)':
Main.cpp:21:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     for (int rep = 0; rep < q.size(); rep++)
      |                       ~~~~^~~~~~~~~~
Main.cpp:31:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |     return n>q.size();
      |            ~^~~~~~~~~
Main.cpp: In function 'int32_t main()':
Main.cpp:52:22: warning: unused variable 'c' [-Wunused-variable]
   52 |             ll r=i+1,c=0;
      |                      ^

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 223 ms 3404 KB Output is correct
2 Correct 170 ms 3276 KB Output is correct
3 Correct 168 ms 3240 KB Output is correct
4 Correct 136 ms 3296 KB Output is correct
5 Correct 147 ms 3432 KB Output is correct
6 Correct 168 ms 3252 KB Output is correct
7 Correct 184 ms 3320 KB Output is correct
8 Correct 212 ms 3332 KB Output is correct
9 Correct 760 ms 3396 KB Output is correct
10 Execution timed out 1081 ms 340 KB Time limit exceeded
11 Halted 0 ms 0 KB -

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 161 ms 3352 KB Output is correct
2 Correct 158 ms 3312 KB Output is correct
3 Correct 159 ms 3284 KB Output is correct
4 Correct 145 ms 4236 KB Output is correct
5 Correct 151 ms 3452 KB Output is correct
6 Correct 156 ms 3280 KB Output is correct
7 Correct 176 ms 3396 KB Output is correct
8 Correct 153 ms 3328 KB Output is correct
9 Correct 209 ms 3776 KB Output is correct
10 Correct 463 ms 4400 KB Output is correct
11 Correct 474 ms 4276 KB Output is correct
12 Correct 0 ms 332 KB Output is correct

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Execution timed out 1092 ms 436 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 223 ms 3404 KB Output is correct
2 Correct 170 ms 3276 KB Output is correct
3 Correct 168 ms 3240 KB Output is correct
4 Correct 136 ms 3296 KB Output is correct
5 Correct 147 ms 3432 KB Output is correct
6 Correct 168 ms 3252 KB Output is correct
7 Correct 184 ms 3320 KB Output is correct
8 Correct 212 ms 3332 KB Output is correct
9 Correct 760 ms 3396 KB Output is correct
10 Execution timed out 1081 ms 340 KB Time limit exceeded
11 Halted 0 ms 0 KB -