oj.uz

Submission #922632

# Submission time Handle Problem Language Result Execution time Memory
922632 2024-02-05T20:50:24 Z BigBadBully Fancy Fence (CEOI20_fancyfence) C++17
100 / 100
 65 ms 6260 KB 
#include<bits/stdc++.h>
#define int long long
#define ff first
#define ss second
using namespace std;
const int mod = 1'000'000'000 + 7;
struct seg{
    int l,r,h;
    
};
bool operator<(const seg& a, const seg& b){
    return a.l < b.l;
};
bool operator>(const seg& a, const seg& b){
    return a.l < b.l;
};

int sum (int l,int r)
{
    
    return ((r*r+r)/2 - (l*l-l)/2)%mod;
}

const int dva = 500000004LL;

void solve()
{

    int n;
    cin >> n;
    int at = 0;
    vector<seg> v(n);
    for (int i = 0; i<n; i++)
    {
        int aew;
        cin >> aew;
        v[i].h = aew;
    }
    for (int i = 0; i < n; i++)
    {
        int w;
        cin >> w;
        v[i].l = at;
        v[i].r = at+w-1;
        at=v[i].r+1;
    }
    int ans = 0;
    int cur = 0;
    set<pair<int,int>> cat;
    
    
    cat.insert({v[0].l,v[n-1].r});
    

    auto remove = [&](seg x)
    {
        auto it = cat.upper_bound({x.l,x.r}); 
        pair<int,int> st;
        if (it != cat.end());
        st = *it;
        if (it == cat.end() || !(x.l >= st.ff && x.r <= st.ss))
            --it;
        pair<int,int> big = *it;
      
        int biglen = big.ss-big.ff+1;
        int oduz =(int)((((__uint128_t)biglen)*((__uint128_t)biglen)+((__uint128_t)biglen))/((__uint128_t)2)%mod);
        cur-=oduz;
        cur+=7*mod;
        cur%=mod;

        if (x.l-1 >= big.ff)
            cat.insert({big.ff,x.l-1});
        if (x.r+1 <= big.ss)
            cat.insert({x.r+1,big.ss});
        

        int len1 = max(0LL,(x.l-1 - big.ff)+1);
        int len2 = max(0LL,big.ss - x.r);

        int oduz1 =(int)((((__uint128_t)len1)*((__uint128_t)len1)+((__uint128_t)len1))/((__uint128_t)2)%mod);
        int oduz2 =(int)((((__uint128_t)len2)*((__uint128_t)len2)+((__uint128_t)len2))/((__uint128_t)2)%mod);

        cat.erase(big);
        cur+=oduz1+oduz2;
        cur%=mod;
    };
    auto comp = [&](seg& mile, seg& alen){
        return (mile.h < alen.h);
    };
    int globallen = (v[n-1].r - v[0].l + 1);
    sort(v.begin(),v.end(),comp);
    int prev = 0;
    int same = 0;
    
    globallen%=mod;
    cur = globallen*globallen+globallen;
    cur%=mod;
    cur*=dva;
    cur%=mod;

    for (int i = 0; i < n; i++)
    {
       
        
        
        if (i!=0 && v[i].h != v[i-1].h)
        {
            ans+=(cur*(sum(prev+1,v[i-1].h)))%mod;
            ans%=mod;
            for (int j = i-1; j >= same; j--)
                remove(v[j]);
            
            same = i;
            prev = v[i-1].h;
        }
    }

    ans+=(cur*(sum(prev+1,v[n-1].h)))%mod;
    ans%=mod;

    cout << ans << '\n';
    return;
}
signed main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    //freopen("input1.txt", "r", stdin);
    solve();
    
}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 13 ms 2928 KB Output is correct
4 Correct 29 ms 4956 KB Output is correct
5 Correct 27 ms 5316 KB Output is correct
6 Correct 18 ms 4332 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 2 ms 604 KB Output is correct
3 Correct 8 ms 1628 KB Output is correct
4 Correct 17 ms 2652 KB Output is correct
5 Correct 18 ms 2652 KB Output is correct
6 Correct 0 ms 348 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 3 ms 604 KB Output is correct
4 Correct 12 ms 1628 KB Output is correct
5 Correct 19 ms 2652 KB Output is correct
6 Correct 18 ms 2652 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 3 ms 604 KB Output is correct
9 Correct 10 ms 1628 KB Output is correct
10 Correct 22 ms 2652 KB Output is correct
11 Correct 22 ms 2652 KB Output is correct
12 Correct 0 ms 348 KB Output is correct

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 352 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct

Subtask #7
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 456 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 13 ms 2788 KB Output is correct
12 Correct 29 ms 4948 KB Output is correct
13 Correct 27 ms 5460 KB Output is correct
14 Correct 18 ms 4444 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 2 ms 816 KB Output is correct
17 Correct 9 ms 2396 KB Output is correct
18 Correct 18 ms 4712 KB Output is correct
19 Correct 19 ms 4696 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 3 ms 860 KB Output is correct
22 Correct 10 ms 2520 KB Output is correct
23 Correct 23 ms 4432 KB Output is correct
24 Correct 23 ms 4700 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 6 ms 856 KB Output is correct
31 Correct 6 ms 860 KB Output is correct
32 Correct 30 ms 3572 KB Output is correct
33 Correct 30 ms 3264 KB Output is correct
34 Correct 63 ms 5944 KB Output is correct
35 Correct 61 ms 5968 KB Output is correct
36 Correct 64 ms 6260 KB Output is correct
37 Correct 65 ms 6228 KB Output is correct
38 Correct 0 ms 344 KB Output is correct
39 Correct 54 ms 4948 KB Output is correct
40 Correct 38 ms 4696 KB Output is correct
41 Correct 27 ms 4580 KB Output is correct
42 Correct 23 ms 4700 KB Output is correct