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Submission #1090707

# Submission time Handle Problem Language Result Execution time Memory
1090707 2024-09-18T15:39:12 Z BigBadBully Fire (BOI24_fire) C++17
100 / 100
 88 ms 49216 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 && normalni[cur].ss < f)
            {
                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;
    if (lb >= rb)
        mini = min(mini,used);
    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 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 348 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 0 ms 348 KB Output is correct
11 Correct 0 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 1 ms 348 KB Output is correct
16 Correct 1 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 1 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
17.0 / 17.0

# 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 348 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 0 ms 348 KB Output is correct
11 Correct 0 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 1 ms 348 KB Output is correct
16 Correct 1 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 1 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 344 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 344 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 460 KB Output is correct
34 Correct 1 ms 376 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 460 KB Output is correct
38 Correct 0 ms 600 KB Output is correct

Subtask #3
9.0 / 9.0

# 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 348 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 0 ms 348 KB Output is correct
11 Correct 0 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 1 ms 348 KB Output is correct
16 Correct 1 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 1 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 344 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 344 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 460 KB Output is correct
34 Correct 1 ms 376 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 460 KB Output is correct
38 Correct 0 ms 600 KB Output is correct
39 Correct 2 ms 860 KB Output is correct
40 Correct 2 ms 1412 KB Output is correct
41 Correct 2 ms 1628 KB Output is correct
42 Correct 2 ms 1388 KB Output is correct
43 Correct 1 ms 720 KB Output is correct
44 Correct 2 ms 1644 KB Output is correct
45 Correct 2 ms 1520 KB Output is correct
46 Correct 2 ms 1644 KB Output is correct
47 Correct 1 ms 632 KB Output is correct
48 Correct 1 ms 604 KB Output is correct
49 Correct 1 ms 1100 KB Output is correct
50 Correct 2 ms 1388 KB Output is correct

Subtask #4
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 352 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 600 KB Output is correct
5 Correct 1 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 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 1 ms 352 KB Output is correct
12 Correct 0 ms 352 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 2 ms 1388 KB Output is correct
16 Correct 2 ms 1400 KB Output is correct
17 Correct 2 ms 616 KB Output is correct
18 Correct 3 ms 1388 KB Output is correct
19 Correct 1 ms 552 KB Output is correct
20 Correct 23 ms 6732 KB Output is correct
21 Correct 58 ms 11344 KB Output is correct
22 Correct 46 ms 10084 KB Output is correct
23 Correct 88 ms 45288 KB Output is correct
24 Correct 66 ms 36804 KB Output is correct
25 Correct 42 ms 7764 KB Output is correct
26 Correct 60 ms 25756 KB Output is correct
27 Correct 74 ms 46168 KB Output is correct
28 Correct 44 ms 9300 KB Output is correct

Subtask #5
21.0 / 21.0

# 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 344 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 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 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 1388 KB Output is correct
13 Correct 2 ms 1388 KB Output is correct
14 Correct 2 ms 1412 KB Output is correct
15 Correct 20 ms 6672 KB Output is correct
16 Correct 72 ms 45096 KB Output is correct
17 Correct 71 ms 45016 KB Output is correct
18 Correct 71 ms 42612 KB Output is correct
19 Correct 71 ms 45884 KB Output is correct
20 Correct 68 ms 46004 KB Output is correct

Subtask #6
26.0 / 26.0

# 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 348 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 0 ms 348 KB Output is correct
11 Correct 0 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 1 ms 348 KB Output is correct
16 Correct 1 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 1 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 344 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 344 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 460 KB Output is correct
34 Correct 1 ms 376 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 460 KB Output is correct
38 Correct 0 ms 600 KB Output is correct
39 Correct 2 ms 860 KB Output is correct
40 Correct 2 ms 1412 KB Output is correct
41 Correct 2 ms 1628 KB Output is correct
42 Correct 2 ms 1388 KB Output is correct
43 Correct 1 ms 720 KB Output is correct
44 Correct 2 ms 1644 KB Output is correct
45 Correct 2 ms 1520 KB Output is correct
46 Correct 2 ms 1644 KB Output is correct
47 Correct 1 ms 632 KB Output is correct
48 Correct 1 ms 604 KB Output is correct
49 Correct 1 ms 1100 KB Output is correct
50 Correct 2 ms 1388 KB Output is correct
51 Correct 0 ms 348 KB Output is correct
52 Correct 0 ms 352 KB Output is correct
53 Correct 0 ms 344 KB Output is correct
54 Correct 0 ms 600 KB Output is correct
55 Correct 1 ms 348 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 0 ms 348 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 1 ms 352 KB Output is correct
62 Correct 0 ms 352 KB Output is correct
63 Correct 0 ms 348 KB Output is correct
64 Correct 0 ms 348 KB Output is correct
65 Correct 2 ms 1388 KB Output is correct
66 Correct 2 ms 1400 KB Output is correct
67 Correct 2 ms 616 KB Output is correct
68 Correct 3 ms 1388 KB Output is correct
69 Correct 1 ms 552 KB Output is correct
70 Correct 23 ms 6732 KB Output is correct
71 Correct 58 ms 11344 KB Output is correct
72 Correct 46 ms 10084 KB Output is correct
73 Correct 88 ms 45288 KB Output is correct
74 Correct 66 ms 36804 KB Output is correct
75 Correct 42 ms 7764 KB Output is correct
76 Correct 60 ms 25756 KB Output is correct
77 Correct 74 ms 46168 KB Output is correct
78 Correct 44 ms 9300 KB Output is correct
79 Correct 0 ms 344 KB Output is correct
80 Correct 0 ms 348 KB Output is correct
81 Correct 0 ms 344 KB Output is correct
82 Correct 0 ms 348 KB Output is correct
83 Correct 0 ms 348 KB Output is correct
84 Correct 0 ms 344 KB Output is correct
85 Correct 0 ms 348 KB Output is correct
86 Correct 0 ms 348 KB Output is correct
87 Correct 1 ms 348 KB Output is correct
88 Correct 0 ms 348 KB Output is correct
89 Correct 0 ms 348 KB Output is correct
90 Correct 2 ms 1388 KB Output is correct
91 Correct 2 ms 1388 KB Output is correct
92 Correct 2 ms 1412 KB Output is correct
93 Correct 20 ms 6672 KB Output is correct
94 Correct 72 ms 45096 KB Output is correct
95 Correct 71 ms 45016 KB Output is correct
96 Correct 71 ms 42612 KB Output is correct
97 Correct 71 ms 45884 KB Output is correct
98 Correct 68 ms 46004 KB Output is correct
99 Correct 45 ms 12452 KB Output is correct
100 Correct 44 ms 13996 KB Output is correct
101 Correct 74 ms 49092 KB Output is correct
102 Correct 67 ms 41420 KB Output is correct
103 Correct 72 ms 49216 KB Output is correct
104 Correct 46 ms 15824 KB Output is correct
105 Correct 40 ms 29088 KB Output is correct