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Submission #1090697

# Submission time Handle Problem Language Result Execution time Memory
1090697 2024-09-18T15:33:03 Z BigBadBully Fire (BOI24_fire) C++17
35 / 100
 75 ms 46004 KB 
#include <bits/stdc++.h>
#define ff first
#define ss second
#define int long long
#define pii pair<int, int>
#define ff first
#define ss second
using namespace std;
const int inf = 1e17;
const int mod = 998244353;
 
 
int solve(int n,int m,vector<pii> v)
{
    for (int i = 0;i  < n; i++)
        if (v[i].ff > v[i].ss)
            v[i].ss+=m;
    sort(v.begin(),v.end());

    {
    vector<bool> del(n);
    int maxi = 0;
    for (int i = 0; i < n;i ++)
    {
        if (v[i].ss <= maxi)
            del[i] = 1;
        maxi = max(maxi,v[i].ss);
    }
    vector<pii> neu;
    for (int i = 0; i < n; i++)
        if (!del[i])
            neu.push_back(v[i]);
    n = neu.size();
    v = neu;
    }
    {
    vector<bool> del(n);
    int mini = v[n-1].ss;
    for (int i = n-1; i >= 0;i--)
    {
        if (v[i].ff >= mini)
            del[i] = 1;
        mini = min(mini,v[i].ff);
    }
    vector<pii> neu;
    for (int i = 0; i < n; i++)
        if (!del[i])
            neu.push_back(v[i]);
    n = neu.size();
    v = neu;
    }
    
    for (int i = 0; i< n;i++)
        v[i].ss%=m;
   
    {
        int bigie = 0;
        for (int i = 0; i < n; i++)
            if (v[i].ff > v[i].ss)
                bigie = max(bigie,v[i].ss);
        vector<bool> del(n);
        for (int i = 0; i < n; i++)
            if (v[i].ff < v[i].ss && v[i].ss < bigie)
                del[i] = 1;
        vector<pii> neu;
        for (int i = 0; i < n; i++)
            if (!del[i])
                neu.push_back(v[i]);
        n = neu.size();
        v = neu;        
    }
    int oldn = n;
    vector<pii> normalni;

    for (int i = 0; i < n; i++)
        if (v[i].ff < v[i].ss)
            normalni.push_back(v[i]);
    n = normalni.size();
    if (!n)
    {
        return -1;
    }
    vector<int> nxt(n);
    
    for (int i = 0; i < n-1; i++)
    {
        int l = i;
        int r = n;
        while (r-l>1)
        {
            int mid = l+r>>1;
            if (normalni[mid].ff > normalni[i].ss)
                r = mid;
            else
                l = mid;
        }
        if (l == i)
        {
           
            return -1;
        }
        nxt[i] = l;

    }
    
    nxt[n-1] = -1;
    vector<vector<int>> lifts(20,vector<int>(n));
    lifts[0] = nxt;
    for (int j = 1; j < 20; j++)
        for (int i = 0; i < n; i++)
        {
            if (lifts[j-1][i] == -1)
                lifts[j][i] = -1;
            else
                lifts[j][i] = lifts[j-1][lifts[j-1][i]];
        }
    n = oldn;
    int normala = normalni.size();
    int mini= inf;
    for (int fix = 0; fix < n; fix++)
    {
        int f = v[fix].ff, s = v[fix].ss;
        int beg;
        if (v[fix].ff > v[fix].ss)
        {
            int L = 0, R = normala-1;
            while (R-L>1)
            {
                int mid = L+R>>1;
                if (normalni[mid].ff > s)
                    R = mid;
                else
                    L = mid;
            }
            if (normalni[R].ff <= s)
                beg = R;
            else
                beg = L;
           
            int cur = beg;
            if (normalni[cur].ff > s)
                continue;
            int mask = 0;
            for (int bit = 19; bit >= 0; bit--)
            {
                int cand = lifts[bit][cur];
                if (cand != -1 && normalni[cand].ss < f)
                {
                    cur = cand;
                    mask|=(1<<bit);
                }
            }
            if (nxt[cur] != -1)
            {
                cur = nxt[cur];
                mask++;
            }
            if (normalni[cur].ss < f)
                continue;
            mini = min(mask+2,mini);
        }

    }
    
    int lb = 0,rb = inf;
    for (int i = 0;i < n; i++)
        if (v[i].ff > v[i].ss)
        {
            lb = max(lb,v[i].ss);
            rb = min(rb,v[i].ff);
        }
    int used = 2;
    int maxright = lb;
    
    for (int i = 0; i < n; i++)
    {
        if (v[i].ff > maxright)
        {
            used++;
            if (i-1 < 0)
            {
                break;
            }
            maxright = v[i-1].ss;
            if (v[i].ff > maxright)
            {
                break;
            }
            if (maxright >= rb)
            {
                mini = min(used,mini);
            }
        }
    }
    if (mini == inf)
        return -1;
    else
        return mini;

}
 
signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n,m;
    cin >> n >> m;
    vector<pii> v(n);
    for (int i = 0; i < n; i++)
        cin >> v[i].ff >> v[i].ss;
    cout << solve(n,m,v) << endl;
}

Compilation message

Main.cpp: In function 'long long int solve(long long int, long long int, std::vector<std::pair<long long int, long long int> >)':
Main.cpp:91:24: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   91 |             int mid = l+r>>1;
      |                       ~^~
Main.cpp:129:28: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  129 |                 int mid = L+R>>1;
      |                           ~^~

Subtask #1
14.0 / 14.0

# 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 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct

Subtask #2
0 / 17.0

# 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 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 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 0 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Incorrect 1 ms 348 KB Output isn't correct
32 Halted 0 ms 0 KB -

Subtask #3
0 / 9.0

# 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 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 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 0 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Incorrect 1 ms 348 KB Output isn't correct
32 Halted 0 ms 0 KB -

Subtask #4
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 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 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Incorrect 1 ms 344 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #5
21.0 / 21.0

# 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 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 344 KB Output is correct
7 Correct 0 ms 600 KB Output is correct
8 Correct 0 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 348 KB Output is correct
12 Correct 2 ms 1528 KB Output is correct
13 Correct 2 ms 1388 KB Output is correct
14 Correct 2 ms 1388 KB Output is correct
15 Correct 21 ms 6736 KB Output is correct
16 Correct 72 ms 45080 KB Output is correct
17 Correct 75 ms 45040 KB Output is correct
18 Correct 74 ms 42076 KB Output is correct
19 Correct 75 ms 46004 KB Output is correct
20 Correct 72 ms 45252 KB Output is correct

Subtask #6
0 / 26.0

# 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 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 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 0 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Incorrect 1 ms 348 KB Output isn't correct
32 Halted 0 ms 0 KB -