oj.uz

Submission #1030093

# Submission time Handle Problem Language Result Execution time Memory
1030093 2024-07-21T20:15:04 Z parsadox2 Election (BOI18_election) C++17
100 / 100
 254 ms 44372 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = 5e5 + 10;

int n , a[N] , q;

struct SEG{
    struct NODE{
        int mnp , mns , sum , ans;
        NODE()
        {
            mnp = mns = sum = ans = 0;
        }
    };
    NODE t[N << 2];
    NODE Merge(NODE lc , NODE rc)
    {
        NODE res;
        res.mnp = min(lc.mnp , lc.sum + rc.mnp);
        res.mns = min(rc.mns , rc.sum + lc.mns);
        res.sum = lc.sum + rc.sum;
        res.ans = max({-lc.mnp - rc.mns , lc.ans - rc.sum , rc.ans - lc.sum});
        return res;
    }
    void Build(int node = 1 , int nl = 0 , int nr = n)
    {
        if(nr - nl == 1)
        {
            t[node].sum = a[nl];
            t[node].mnp = t[node].mns = min(a[nl] , 0);
            t[node].ans = -t[node].mns;
            return;
        }
        int mid = (nl + nr) >> 1 , lc = node << 1 , rc = lc | 1;
        Build(lc , nl , mid);  Build(rc , mid , nr);
        t[node] = Merge(t[lc] , t[rc]);
        //cout << nl << " " << nr << " " << t[node].ans << endl;
    }
    NODE Get(int l , int r , int node = 1 , int nl = 0 , int nr = n)
    {
        if(nr <= l || r <= nl)
        {
            NODE emp;
            return emp;
        }
        if(l <= nl && nr <= r)
            return t[node];
        int mid = (nl + nr) >> 1 , lc = node << 1 , rc = lc | 1;
        return Merge(Get(l , r , lc , nl , mid) , Get(l , r , rc , mid , nr));
    }
} seg;

signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);  cout.tie(0);
    cin >> n;
    for(int i = 0 ; i < n ; i++)
    {
        char c;  cin >> c;
        if(c == 'C')
            a[i] = 1;
        else
            a[i] = -1;
    }
    seg.Build();
    cin >> q;
    for(int i = 0 ; i < q ; i++)
    {
        int l , r;  cin >> l >> r;  l--;
        cout << seg.Get(l , r).ans << '\n';
    }
    return 0;
}

Subtask #1
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 31576 KB Output is correct
2 Correct 6 ms 31576 KB Output is correct
3 Correct 5 ms 31580 KB Output is correct
4 Correct 6 ms 31836 KB Output is correct
5 Correct 5 ms 31580 KB Output is correct

Subtask #2
54.0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 31576 KB Output is correct
2 Correct 6 ms 31576 KB Output is correct
3 Correct 5 ms 31580 KB Output is correct
4 Correct 6 ms 31836 KB Output is correct
5 Correct 5 ms 31580 KB Output is correct
6 Correct 36 ms 33140 KB Output is correct
7 Correct 33 ms 33108 KB Output is correct
8 Correct 33 ms 33104 KB Output is correct
9 Correct 33 ms 32988 KB Output is correct
10 Correct 35 ms 33116 KB Output is correct
11 Correct 35 ms 33112 KB Output is correct
12 Correct 35 ms 33108 KB Output is correct
13 Correct 36 ms 33108 KB Output is correct
14 Correct 34 ms 33112 KB Output is correct
15 Correct 35 ms 33116 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 31576 KB Output is correct
2 Correct 6 ms 31576 KB Output is correct
3 Correct 5 ms 31580 KB Output is correct
4 Correct 6 ms 31836 KB Output is correct
5 Correct 5 ms 31580 KB Output is correct
6 Correct 36 ms 33140 KB Output is correct
7 Correct 33 ms 33108 KB Output is correct
8 Correct 33 ms 33104 KB Output is correct
9 Correct 33 ms 32988 KB Output is correct
10 Correct 35 ms 33116 KB Output is correct
11 Correct 35 ms 33112 KB Output is correct
12 Correct 35 ms 33108 KB Output is correct
13 Correct 36 ms 33108 KB Output is correct
14 Correct 34 ms 33112 KB Output is correct
15 Correct 35 ms 33116 KB Output is correct
16 Correct 254 ms 43348 KB Output is correct
17 Correct 249 ms 42836 KB Output is correct
18 Correct 246 ms 43132 KB Output is correct
19 Correct 223 ms 42580 KB Output is correct
20 Correct 237 ms 42276 KB Output is correct
21 Correct 253 ms 44096 KB Output is correct
22 Correct 241 ms 43984 KB Output is correct
23 Correct 244 ms 44372 KB Output is correct
24 Correct 234 ms 43860 KB Output is correct
25 Correct 245 ms 43496 KB Output is correct