oj.uz

Submission #232722

# Submission time Handle Problem Language Result Execution time Memory
232722 2020-05-17T23:59:04 Z medk Building 4 (JOI20_building4) C++14
100 / 100
 470 ms 76952 KB 
#include <bits/stdc++.h>

#define ll long long
#define pb push_back
#define x first
#define y second
#define sz(u) (int)(u.size())
#define all(u) u.begin(),u.end()

using namespace std;

const int MAXN=5e5;
int n,tmp;

vector<vector<pair<int,int>>> a(2*MAXN);

int main()
{
    ios::sync_with_stdio(0); cin.tie(0);
    cin>>n;
    for(int i=0;i<2*n;i++)
    {
        cin>>tmp;
        a[i].pb({tmp,0});
    }
    for(int i=0;i<2*n;i++)
    {
        cin>>tmp;
        a[i].pb({tmp,1});
        if(a[i][0].x<a[i][1].x) swap(a[i][0],a[i][1]);
    }
    for(int i=2*n-2;i>=0;i--)
    {
        if(a[i][0].x>a[i+1][0].x) a[i].erase(a[i].begin());
        if(a[i][0].x>a[i+1][0].x) a[i].erase(a[i].begin());
        if(sz(a[i])==0)
        {
            cout<<-1;
            return 0;
        }
    }
    for(int i=1;i<2*n;i++)
        if(a[i].back().x<a[i-1].back().x) a[i].erase(prev(a[i].end()));
    string ans="";
    int cnt=0;
    for(int i=0;i<2*n;i++) ans+='A'+a[i][0].y, cnt+=a[i][0].y;
    int need=cnt<n;
    int left=abs(n-cnt), late=0;
    int newstart=0;
    for(int i=0;i<2*n && left;i++)
    {
        if(sz(a[i])!=2)
        {
            newstart=i+1;
            late=0;
            continue;
        }
        if(i) if(a[i][1].x>=a[i-1][0].x) newstart=i, late=0;
        if(a[i][1].y==need)
        {
            late++;
            if(late>=0)
            {
                for(int j=newstart;j<=i;j++) ans[j]='A'+a[j][1].y;
                newstart=i+1;
                left-=late;
                late=0;
            }
        }
        else late--;
    }
    if(left) cout<<-1;
    else cout<<ans;
    return 0;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 23808 KB Output is correct
2 Correct 18 ms 23808 KB Output is correct
3 Correct 17 ms 23936 KB Output is correct
4 Correct 18 ms 23808 KB Output is correct
5 Correct 19 ms 24064 KB Output is correct
6 Correct 19 ms 24064 KB Output is correct
7 Correct 18 ms 24064 KB Output is correct
8 Correct 19 ms 24064 KB Output is correct
9 Correct 20 ms 24064 KB Output is correct
10 Correct 19 ms 23936 KB Output is correct
11 Correct 19 ms 24064 KB Output is correct
12 Correct 19 ms 24064 KB Output is correct
13 Correct 19 ms 24064 KB Output is correct
14 Correct 19 ms 24064 KB Output is correct
15 Correct 19 ms 24064 KB Output is correct
16 Correct 20 ms 24064 KB Output is correct
17 Correct 20 ms 24040 KB Output is correct
18 Correct 18 ms 24064 KB Output is correct
19 Correct 19 ms 24064 KB Output is correct
20 Correct 20 ms 24056 KB Output is correct
21 Correct 19 ms 24064 KB Output is correct
22 Correct 19 ms 24064 KB Output is correct
23 Correct 19 ms 24064 KB Output is correct
24 Correct 20 ms 24064 KB Output is correct
25 Correct 19 ms 24064 KB Output is correct
26 Correct 18 ms 24064 KB Output is correct
27 Correct 18 ms 24064 KB Output is correct
28 Correct 18 ms 23936 KB Output is correct
29 Correct 18 ms 24064 KB Output is correct
30 Correct 19 ms 24064 KB Output is correct
31 Correct 18 ms 24064 KB Output is correct
32 Correct 18 ms 23936 KB Output is correct
33 Correct 19 ms 24064 KB Output is correct

Subtask #2
89.0 / 89.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 23808 KB Output is correct
2 Correct 18 ms 23808 KB Output is correct
3 Correct 17 ms 23936 KB Output is correct
4 Correct 18 ms 23808 KB Output is correct
5 Correct 19 ms 24064 KB Output is correct
6 Correct 19 ms 24064 KB Output is correct
7 Correct 18 ms 24064 KB Output is correct
8 Correct 19 ms 24064 KB Output is correct
9 Correct 20 ms 24064 KB Output is correct
10 Correct 19 ms 23936 KB Output is correct
11 Correct 19 ms 24064 KB Output is correct
12 Correct 19 ms 24064 KB Output is correct
13 Correct 19 ms 24064 KB Output is correct
14 Correct 19 ms 24064 KB Output is correct
15 Correct 19 ms 24064 KB Output is correct
16 Correct 20 ms 24064 KB Output is correct
17 Correct 20 ms 24040 KB Output is correct
18 Correct 18 ms 24064 KB Output is correct
19 Correct 19 ms 24064 KB Output is correct
20 Correct 20 ms 24056 KB Output is correct
21 Correct 19 ms 24064 KB Output is correct
22 Correct 19 ms 24064 KB Output is correct
23 Correct 19 ms 24064 KB Output is correct
24 Correct 20 ms 24064 KB Output is correct
25 Correct 19 ms 24064 KB Output is correct
26 Correct 18 ms 24064 KB Output is correct
27 Correct 18 ms 24064 KB Output is correct
28 Correct 18 ms 23936 KB Output is correct
29 Correct 18 ms 24064 KB Output is correct
30 Correct 19 ms 24064 KB Output is correct
31 Correct 18 ms 24064 KB Output is correct
32 Correct 18 ms 23936 KB Output is correct
33 Correct 19 ms 24064 KB Output is correct
34 Correct 419 ms 55056 KB Output is correct
35 Correct 411 ms 55044 KB Output is correct
36 Correct 403 ms 54576 KB Output is correct
37 Correct 421 ms 55216 KB Output is correct
38 Correct 413 ms 55276 KB Output is correct
39 Correct 407 ms 55344 KB Output is correct
40 Correct 432 ms 57456 KB Output is correct
41 Correct 411 ms 55984 KB Output is correct
42 Correct 426 ms 56368 KB Output is correct
43 Correct 439 ms 57732 KB Output is correct
44 Correct 444 ms 57836 KB Output is correct
45 Correct 447 ms 62496 KB Output is correct
46 Correct 447 ms 62356 KB Output is correct
47 Correct 466 ms 75680 KB Output is correct
48 Correct 466 ms 75520 KB Output is correct
49 Correct 433 ms 60396 KB Output is correct
50 Correct 470 ms 75880 KB Output is correct
51 Correct 453 ms 75852 KB Output is correct
52 Correct 339 ms 65004 KB Output is correct
53 Correct 342 ms 65004 KB Output is correct
54 Correct 319 ms 64876 KB Output is correct
55 Correct 322 ms 64620 KB Output is correct
56 Correct 470 ms 76952 KB Output is correct
57 Correct 409 ms 71596 KB Output is correct
58 Correct 421 ms 71916 KB Output is correct
59 Correct 423 ms 71916 KB Output is correct
60 Correct 406 ms 69420 KB Output is correct
61 Correct 434 ms 72428 KB Output is correct
62 Correct 433 ms 71660 KB Output is correct
63 Correct 434 ms 72380 KB Output is correct
64 Correct 408 ms 70704 KB Output is correct
65 Correct 434 ms 72300 KB Output is correct