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Submission #499854

# Submission time Handle Problem Language Result Execution time Memory
499854 2021-12-29T19:41:22 Z Lobo Group Photo (JOI21_ho_t3) C++17
44 / 100
 27 ms 432 KB 
#include<bits/stdc++.h>
using namespace std;
 
/*for ordered_set
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
#define ordered_set tree<pair<int,int>, null_type,less<pair<int,int>>, rb_tree_tag,tree_order_statistics_node_update>
*/
 
const long long INFll = (long long) 1e18 + 10;
const int INFii = (int) 1e9 + 10;
typedef long long ll;
typedef int ii;
typedef long double dbl;
#define endl '\n'
#define sc second
#define fr first
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()
 
#define maxn 220
 
ii n, a[maxn], pos[maxn], bit[maxn], dp[maxn], mark[maxn];
 
void att(ii id, ii val) {
    for(ii i = id; i <= n; i+= i&-i) {
        bit[i]+= val;
    }
}
 
ii qr(ii id) {
    ii val = 0;
    for(ii i = id; i > 0; i-= i&-i) {
        val+= bit[i];
    }
    return val;
}
 
ii sol(ii i) {
    if(mark[i]) return dp[i];
    mark[i] = 1;
    ii ans = INFii;
    if(i == n) return dp[i] = 0;
 
    for(ii k = i+1; k <= n; k++) {
        ii ans1 = 0;
 
        for(ii j = 1; j <= n; j++) {
            bit[j] = 0;
        }
 
        for(ii j = 1; j <= i; j++) {
            att(pos[j],1);
        }
 

        for(ii j = i+1, x = k; j <= k; j++,x--) {
            ans1+= j-1-qr(pos[x]);
            att(pos[x],+1);
        }
 
        ans = min(ans, ans1+sol(k));
    }
 
    return dp[i] = ans;
}
 
void solve() {
    cin >> n;
 
    for(ii i = 1; i <= n; i++) {
        cin >> a[i];
        pos[a[i]] = i;
    }
 
    cout << sol(0) << endl;
 
    
}
 
int main() {
    ios::sync_with_stdio(false); cin.tie(0);
 
    // freopen("in.in", "r", stdin);
    //freopen("out.out", "w", stdout);
 
    ii tt = 1;
    // cin >> tt;
    while(tt--) solve();
 
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 316 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 316 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 312 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 0 ms 316 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 0 ms 320 KB Output is correct

Subtask #3
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 316 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 312 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 0 ms 316 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 0 ms 320 KB Output is correct
21 Correct 21 ms 204 KB Output is correct
22 Correct 22 ms 204 KB Output is correct
23 Correct 22 ms 204 KB Output is correct
24 Correct 24 ms 320 KB Output is correct
25 Correct 27 ms 312 KB Output is correct
26 Correct 22 ms 204 KB Output is correct
27 Correct 24 ms 324 KB Output is correct
28 Correct 25 ms 308 KB Output is correct
29 Correct 22 ms 312 KB Output is correct
30 Correct 22 ms 204 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 316 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 312 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 0 ms 316 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 0 ms 320 KB Output is correct
21 Correct 21 ms 204 KB Output is correct
22 Correct 22 ms 204 KB Output is correct
23 Correct 22 ms 204 KB Output is correct
24 Correct 24 ms 320 KB Output is correct
25 Correct 27 ms 312 KB Output is correct
26 Correct 22 ms 204 KB Output is correct
27 Correct 24 ms 324 KB Output is correct
28 Correct 25 ms 308 KB Output is correct
29 Correct 22 ms 312 KB Output is correct
30 Correct 22 ms 204 KB Output is correct
31 Runtime error 1 ms 432 KB Execution killed with signal 11
32 Halted 0 ms 0 KB -

Subtask #5
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 316 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 312 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 0 ms 316 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 0 ms 320 KB Output is correct
21 Correct 21 ms 204 KB Output is correct
22 Correct 22 ms 204 KB Output is correct
23 Correct 22 ms 204 KB Output is correct
24 Correct 24 ms 320 KB Output is correct
25 Correct 27 ms 312 KB Output is correct
26 Correct 22 ms 204 KB Output is correct
27 Correct 24 ms 324 KB Output is correct
28 Correct 25 ms 308 KB Output is correct
29 Correct 22 ms 312 KB Output is correct
30 Correct 22 ms 204 KB Output is correct
31 Runtime error 1 ms 432 KB Execution killed with signal 11
32 Halted 0 ms 0 KB -