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Submission #576674

# Submission time Handle Problem Language Result Execution time Memory
576674 2022-06-13T09:06:32 Z vqpahmad Exam (eJOI20_exam) C++14
12 / 100
 1000 ms 524288 KB 
#include <bits/stdc++.h>
#define ll long long
#define endl '\n'
#define all(a) a.begin(),a.end()
#define mod (ll)(10000007)
using namespace std;
const int mx = 1e6 + 15;
vector<int> a;
vector<int> b;
int solve(int s, int e){
    if (e-s<=1) return 0;
    map<int,int> mp;
    int mid = (s+e)/2;
    int mx = -1;
    int cnt = 0;
    for (int i = mid-1;i>=s;i--){
        mp[b[i]]++;
        if (b[i]<=mx && binary_search(a.begin()+mid,a.begin()+e,b[i])){
            cnt+=mp[b[i]];
        }
        else if (mp[b[i]]>cnt&&binary_search(a.begin()+mid,a.begin()+e,b[i])){
            cnt = mp[b[i]];
            mx = b[i];
        }
    }
    int p = s;
    for (int i=mid;i<e;i++){
        if (a[i]==mx){
            p = i;
            break;
        }
    }
    return max(solve(s,mid)+solve(mid,e),cnt+solve(p,e));
}


int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n;
    cin >> n;
    vector<pair<int,int>> ab(n);
    a.resize(n);
    b.resize(n);
    bool flag = 1;
    bool ans = 0;
    for (int i=0;i<n;i++){
        cin >> ab[i].first;
        a[i] = ab[i].first;
    }
    for (int i=0;i<n;i++){
        cin >> ab[i].second;
        b[i] = ab[i].second;
        if (i){
            if (ab[i-1].second!=ab[i].second) flag = 0;
        }
    }
    for (int i=0;i<n;i++){
        if (ab[i].first==ab[i].second) ans = 1;
    }
    if (flag&&ans) {
        int cnt =0;
        for (int i=0;i<n;i++){
            if (ab[i].first==ab[i].second){
                int p = i;
                while (ab[p].first<=ab[i].second){
                    cnt++;
                    p--;
                    if (p==-1) break;
                }
                p = i+1;
                if (p!=n){
                    while (ab[p].first<=ab[i].second){
                        cnt++;
                        p++;
                        if (p==n) break;
                    }
                }
                i = p-1;
            }
        }
        cout << cnt ;
    }
    else {
        cout << solve(0,n);
    }

    
}

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Runtime error 338 ms 524288 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 5 ms 852 KB Output is correct
3 Correct 15 ms 2072 KB Output is correct
4 Correct 10 ms 2144 KB Output is correct
5 Correct 31 ms 2208 KB Output is correct
6 Correct 12 ms 2120 KB Output is correct
7 Correct 11 ms 2156 KB Output is correct
8 Correct 22 ms 2356 KB Output is correct

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Runtime error 317 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1108 ms 512864 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Runtime error 338 ms 524288 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #6
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Runtime error 338 ms 524288 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -