oj.uz

Submission #850646

# Submission time Handle Problem Language Result Execution time Memory
850646 2023-09-17T08:24:02 Z Dextar Radio Towers (IOI22_towers) C++17
23 / 100
 4000 ms 28496 KB 
#include <cstdio>
#ifdef DEBUG
    #define D(X) X
#else
    #define D(X)
#endif
#include <bits/stdc++.h>
#define F first
#define S second
#define ll long long
#define pi 3.14159265359
#define pub push_back
#define pob pop_back
#define pari pair<int,int>
#define parli pair<long, long>

using namespace std;

const int INF = 1000 * 1000 * 1000;
const ll INF2 = 1LL * 1000 * 1000 * 1000 * 1000 * 1000 * 1000;
const int mod = 1000 * 1000 * 1000 + 7;

bool comp(vector<ll>& v1, vector<ll>& v2)
{
    return v1[0] < v2[0];
}


struct seg {
      vector<int> tree;
      int sz;

      void build(int n) {
          sz = 1;
          while(sz<n) {
              sz *= 2;
          }
          tree.resize(2*sz + 1, 0);
      }

      void clean()
      {
          for(int i=0; i<tree.size(); i++) {
              tree[i] = 0;
          }
      }

      void recSet(int idx, int lx, int rx, int i, int val) {
           if(rx-lx==1) {
               tree[idx] = val;
               return;
           }
           int mid = (lx+rx)/2;
           if(i<mid) {
               recSet(2*idx+1, lx, mid, i, val);
           } else
           {
               recSet(2*idx+2, mid, rx, i, val);
           }
           tree[idx] = max(tree[2*idx+1], tree[2*idx+2]);
      }

      void setX(int i, int val) {
          recSet(0, 0, sz, i, val);
      }

      int rec_range(int idx, int lx, int rx, int l, int r) {
          if(lx>=l&&rx<=r) {
              return tree[idx];
          }
          if(rx<=l||lx>=r) return 0;
          int mid = (lx+rx)/2;
          int left = rec_range(2*idx+1, lx, mid, l, r);
          int right = rec_range(2*idx+2, mid, rx, l, r);
          return max(left, right);
      }

      int range(int l, int r) {
          return rec_range(0, 0, sz, l, r);
      }
};


vector<int> dp;
seg mint, maxt;
map<int, int> ord;
vector<int> h;
int res = 0;


void init2(int l, int r, int d)
{
    int n = h.size();
    res = 0;
    for(int i=0; i<=n; i++) {
        dp[i] = 0;
    }
    vector<int> used(n+1, 0);
    vector<int> nums;
    for(int i=l; i<=r; i++) {
        int f1 = 0, f2 = 0;
        nums.pub(h[i]);
        nums.pub(h[i]-d);
        nums.pub(h[i]+d);
        if(i>l) {
            if(h[i]>=h[i-1]) {
                f1 = 1;
            } else
            {
                f1 = 2;
            }
        }
        if(i<r) {
            if(h[i]>=h[i+1]) {
                f2 = 1;
            } else
            {
                f2 = 2;
            }
        }
        if(f1==0) {
            f1 = f2;
        }
        if(f2==0) {
            f2 = f1;
        }
        if(f1==f2) {
            used[i] = f1;
        }
    }
    sort(nums.begin(), nums.end());
    ord.clear();
    ord[nums[0]] = 0;
    int sz = nums.size();
    for(int i=1; i<sz; i++) {
        if(nums[i]>nums[i-1]) {
            ord[nums[i]] = ord[nums[i-1]] + 1;
        } else
        {
            ord[nums[i]] = ord[nums[i-1]];
        }
    }
    mint.clean();
    maxt.clean();
    mint.build(sz);
    maxt.build(sz);

    for(int i=r; i>=l; i--) {
        if(used[i]==0) {
            continue;
        }
        if(used[i]==1&&h[i]-d>0) {
            dp[i] = mint.range(0, ord[h[i]-d] + 1);
            maxt.setX(ord[h[i]], dp[i]);
        }
        if(used[i]==2) {
            dp[i] = 1 + maxt.range(ord[h[i]+d], sz);
            mint.setX(ord[h[i]], dp[i]);
        }
        res = max(res, dp[i]);
    }
}


void init(int n, vector<int> h2)
{
    h.resize(n);
    for(int i=0; i<n; i++) {
        h[i] = h2[i];
    }
    dp.resize(n+1);
    init2(0, n - 1, 1);
}

int max_towers(int l, int r, int d)
{
    init2(l, r, d);
    if(l==0&&r==h.size()-1) {
        return res;
    }

    return res;
}

/*
4 0 3 20
0 1 2
1 2 3
18 1 19
*/

/*
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    //D(freopen("input.txt","r",stdin);)
    //D(freopen("ouput.txt","w",stdout);)
    int t = 1;
    //cin >> t;
    loop:
    while(t--)
    {
        int n;
        cin >> n;
        vector<int> a(n);
        for(int i=0; i<n; i++) {
            cin >> a[i];
        }
        init(n, a);
        int res = max_towers(1, 5, 10);
        if(res==0) {
            res = 1;
        }
        cout << res;
    }
    return 0;
}
*/

Compilation message

towers.cpp: In member function 'void seg::clean()':
towers.cpp:43:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |           for(int i=0; i<tree.size(); i++) {
      |                        ~^~~~~~~~~~~~
towers.cpp: In function 'int max_towers(int, int, int)':
towers.cpp:178:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  178 |     if(l==0&&r==h.size()-1) {
      |              ~^~~~~~~~~~~~

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4077 ms 15592 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 3 ms 856 KB Output is correct
3 Correct 2 ms 856 KB Output is correct
4 Correct 3 ms 904 KB Output is correct
5 Correct 3 ms 856 KB Output is correct
6 Correct 2 ms 856 KB Output is correct
7 Correct 3 ms 856 KB Output is correct
8 Correct 1 ms 856 KB Output is correct
9 Correct 1 ms 856 KB Output is correct
10 Correct 1 ms 856 KB Output is correct
11 Correct 1 ms 856 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 2 ms 856 KB Output is correct
14 Correct 2 ms 856 KB Output is correct
15 Correct 2 ms 856 KB Output is correct
16 Correct 3 ms 1108 KB Output is correct
17 Correct 3 ms 856 KB Output is correct
18 Correct 1 ms 856 KB Output is correct
19 Correct 2 ms 856 KB Output is correct
20 Correct 3 ms 856 KB Output is correct
21 Correct 4 ms 1112 KB Output is correct
22 Correct 4 ms 856 KB Output is correct
23 Correct 2 ms 856 KB Output is correct
24 Correct 2 ms 856 KB Output is correct
25 Correct 2 ms 600 KB Output is correct
26 Correct 3 ms 856 KB Output is correct
27 Correct 3 ms 856 KB Output is correct
28 Correct 3 ms 856 KB Output is correct
29 Correct 4 ms 856 KB Output is correct
30 Correct 4 ms 856 KB Output is correct
31 Correct 4 ms 856 KB Output is correct
32 Correct 2 ms 1112 KB Output is correct
33 Correct 2 ms 856 KB Output is correct
34 Correct 2 ms 856 KB Output is correct
35 Correct 2 ms 856 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 3 ms 856 KB Output is correct
3 Correct 2 ms 856 KB Output is correct
4 Correct 3 ms 904 KB Output is correct
5 Correct 3 ms 856 KB Output is correct
6 Correct 2 ms 856 KB Output is correct
7 Correct 3 ms 856 KB Output is correct
8 Correct 1 ms 856 KB Output is correct
9 Correct 1 ms 856 KB Output is correct
10 Correct 1 ms 856 KB Output is correct
11 Correct 1 ms 856 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 2 ms 856 KB Output is correct
14 Correct 2 ms 856 KB Output is correct
15 Correct 2 ms 856 KB Output is correct
16 Correct 3 ms 1108 KB Output is correct
17 Correct 3 ms 856 KB Output is correct
18 Correct 1 ms 856 KB Output is correct
19 Correct 2 ms 856 KB Output is correct
20 Correct 3 ms 856 KB Output is correct
21 Correct 4 ms 1112 KB Output is correct
22 Correct 4 ms 856 KB Output is correct
23 Correct 2 ms 856 KB Output is correct
24 Correct 2 ms 856 KB Output is correct
25 Correct 2 ms 600 KB Output is correct
26 Correct 3 ms 856 KB Output is correct
27 Correct 3 ms 856 KB Output is correct
28 Correct 3 ms 856 KB Output is correct
29 Correct 4 ms 856 KB Output is correct
30 Correct 4 ms 856 KB Output is correct
31 Correct 4 ms 856 KB Output is correct
32 Correct 2 ms 1112 KB Output is correct
33 Correct 2 ms 856 KB Output is correct
34 Correct 2 ms 856 KB Output is correct
35 Correct 2 ms 856 KB Output is correct
36 Correct 115 ms 15504 KB Output is correct
37 Correct 207 ms 25752 KB Output is correct
38 Correct 186 ms 25864 KB Output is correct
39 Correct 220 ms 25792 KB Output is correct
40 Correct 217 ms 25728 KB Output is correct
41 Correct 333 ms 26212 KB Output is correct
42 Correct 203 ms 25704 KB Output is correct
43 Correct 128 ms 26236 KB Output is correct
44 Correct 96 ms 25664 KB Output is correct
45 Correct 88 ms 25764 KB Output is correct
46 Correct 100 ms 25800 KB Output is correct
47 Correct 217 ms 25976 KB Output is correct
48 Correct 216 ms 25708 KB Output is correct
49 Correct 212 ms 25704 KB Output is correct
50 Correct 118 ms 25752 KB Output is correct
51 Correct 112 ms 25864 KB Output is correct
52 Correct 349 ms 27528 KB Output is correct
53 Correct 408 ms 27352 KB Output is correct
54 Correct 429 ms 28496 KB Output is correct
55 Correct 162 ms 27328 KB Output is correct
56 Correct 160 ms 27380 KB Output is correct
57 Correct 298 ms 26912 KB Output is correct
58 Correct 335 ms 28480 KB Output is correct
59 Correct 353 ms 27608 KB Output is correct
60 Correct 459 ms 27388 KB Output is correct
61 Correct 399 ms 28468 KB Output is correct
62 Correct 404 ms 27352 KB Output is correct
63 Correct 373 ms 27556 KB Output is correct
64 Correct 180 ms 27476 KB Output is correct
65 Correct 168 ms 27380 KB Output is correct
66 Correct 183 ms 27420 KB Output is correct
67 Correct 191 ms 27532 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4027 ms 26256 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4038 ms 7376 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 3 ms 856 KB Output is correct
3 Correct 2 ms 856 KB Output is correct
4 Correct 3 ms 904 KB Output is correct
5 Correct 3 ms 856 KB Output is correct
6 Correct 2 ms 856 KB Output is correct
7 Correct 3 ms 856 KB Output is correct
8 Correct 1 ms 856 KB Output is correct
9 Correct 1 ms 856 KB Output is correct
10 Correct 1 ms 856 KB Output is correct
11 Correct 1 ms 856 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 2 ms 856 KB Output is correct
14 Correct 2 ms 856 KB Output is correct
15 Correct 2 ms 856 KB Output is correct
16 Correct 3 ms 1108 KB Output is correct
17 Correct 3 ms 856 KB Output is correct
18 Correct 1 ms 856 KB Output is correct
19 Correct 2 ms 856 KB Output is correct
20 Correct 3 ms 856 KB Output is correct
21 Correct 4 ms 1112 KB Output is correct
22 Correct 4 ms 856 KB Output is correct
23 Correct 2 ms 856 KB Output is correct
24 Correct 2 ms 856 KB Output is correct
25 Correct 2 ms 600 KB Output is correct
26 Correct 3 ms 856 KB Output is correct
27 Correct 3 ms 856 KB Output is correct
28 Correct 3 ms 856 KB Output is correct
29 Correct 4 ms 856 KB Output is correct
30 Correct 4 ms 856 KB Output is correct
31 Correct 4 ms 856 KB Output is correct
32 Correct 2 ms 1112 KB Output is correct
33 Correct 2 ms 856 KB Output is correct
34 Correct 2 ms 856 KB Output is correct
35 Correct 2 ms 856 KB Output is correct
36 Correct 115 ms 15504 KB Output is correct
37 Correct 207 ms 25752 KB Output is correct
38 Correct 186 ms 25864 KB Output is correct
39 Correct 220 ms 25792 KB Output is correct
40 Correct 217 ms 25728 KB Output is correct
41 Correct 333 ms 26212 KB Output is correct
42 Correct 203 ms 25704 KB Output is correct
43 Correct 128 ms 26236 KB Output is correct
44 Correct 96 ms 25664 KB Output is correct
45 Correct 88 ms 25764 KB Output is correct
46 Correct 100 ms 25800 KB Output is correct
47 Correct 217 ms 25976 KB Output is correct
48 Correct 216 ms 25708 KB Output is correct
49 Correct 212 ms 25704 KB Output is correct
50 Correct 118 ms 25752 KB Output is correct
51 Correct 112 ms 25864 KB Output is correct
52 Correct 349 ms 27528 KB Output is correct
53 Correct 408 ms 27352 KB Output is correct
54 Correct 429 ms 28496 KB Output is correct
55 Correct 162 ms 27328 KB Output is correct
56 Correct 160 ms 27380 KB Output is correct
57 Correct 298 ms 26912 KB Output is correct
58 Correct 335 ms 28480 KB Output is correct
59 Correct 353 ms 27608 KB Output is correct
60 Correct 459 ms 27388 KB Output is correct
61 Correct 399 ms 28468 KB Output is correct
62 Correct 404 ms 27352 KB Output is correct
63 Correct 373 ms 27556 KB Output is correct
64 Correct 180 ms 27476 KB Output is correct
65 Correct 168 ms 27380 KB Output is correct
66 Correct 183 ms 27420 KB Output is correct
67 Correct 191 ms 27532 KB Output is correct
68 Execution timed out 4027 ms 26256 KB Time limit exceeded
69 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4077 ms 15592 KB Time limit exceeded
2 Halted 0 ms 0 KB -