oj.uz

Submission #1116272

# Submission time Handle Problem Language Result Execution time Memory
1116272 2024-11-21T12:05:35 Z SalihSahin Cigle (COI21_cigle) C++14
48 / 100
 1000 ms 141080 KB 
#include <bits/stdc++.h>
#define pb push_back
using namespace std;
 
const int N = 5e3 + 5;
 
vector<int> a(N);

struct SEGT{
   vector<int> tree, lazy;

   void init(int n){
      tree.assign(4*n, 0);
      lazy.assign(4*n, 0);
   }

   void push(int ind){
      if(lazy[ind] == 0) return;

      lazy[ind*2] += lazy[ind];
      tree[ind*2] += lazy[ind];
      lazy[ind*2+1] += lazy[ind];
      tree[ind*2+1] += lazy[ind];
      lazy[ind] = 0;
   }

   void update(int ind, int l, int r, int ql, int qr, int val){
      if(l > r || r < ql || l > qr || ql > qr) return;
      if(l >= ql && r <= qr){
         tree[ind] += val;
         lazy[ind] += val;
      }
      else{
         push(ind);
         int m = (l + r)/2;

         update(ind*2, l, m, ql, qr, val);
         update(ind*2+1, m+1, r, ql, qr, val);
         tree[ind] = max(tree[ind*2], tree[ind*2+1]);
      }
   }

   int query(int ind, int l, int r, int ql, int qr){
      if(l > r || r < ql || l > qr || ql > qr) return 0;
      if(l >= ql && r <= qr){
         return tree[ind];
      }
      else{
         push(ind);
         int m = (l + r)/2;

         return max(query(ind*2, l, m, ql, qr), query(ind*2+1, m+1, r, ql, qr));
      }
   }
};
 
 
int main(){
   ios_base::sync_with_stdio(false);
   cin.tie(0); cout.tie(0);
   // dp[son kat l][son kat r] -> dp[r + 1][x] + match({l, r} , {r+1, x});
   int n;
   cin>>n;
   for(int i = 1; i <= n; i++){
      cin>>a[i];
   }

   vector<pair<int, int> > upd[n+5];

   for(int i = 2; i <= n-1; i++){
      vector<pair<int, int> > v1, v2;
 
      int val = 0;
      for(int j = i; j > 1; j--){
         val += a[j];
         v1.pb({val, j});
      }
 
      val = 0;
      for(int j = i+1; j <= n-1; j++){
         val += a[j];
         v2.pb({val, j});
      }
 
      int ind2 = 0;
      for(int j = 0; j < v1.size(); j++){
         while(ind2 < v2.size() && v2[ind2].first < v1[j].first) ind2++;
         if(ind2 < v2.size() && v2[ind2].first == v1[j].first){
            upd[i].pb({v2[ind2].second, v1[j].second});
         }
      }
   }
 
   vector<vector<int> > dp(n+5, vector<int>(n+5));

   for(int r = 1; r <= n-1; r++){
      sort(upd[r].begin(), upd[r].end());
      int updind = 0;

      SEGT seg;
      seg.init(r);
      for(int l = 1; l <= r; l++){
         seg.update(1, 1, r, l, l, dp[l][r]);
      }

      for(int x = r+1; x <= n; x++){
         while(updind < upd[r].size() && upd[r][updind].first < x){
            seg.update(1, 1, r, 1, upd[r][updind].second-1, 1);
            updind++;
         }

         dp[r+1][x] = seg.tree[1];
      }
   }

   int ans = 0;
   for(int i = 1; i <= n; i++){
      ans = max(ans, dp[i][n]);
   }
   cout<<ans<<endl;
   return 0;
}

Compilation message

cigle.cpp: In function 'int main()':
cigle.cpp:86:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   86 |       for(int j = 0; j < v1.size(); j++){
      |                      ~~^~~~~~~~~~~
cigle.cpp:87:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   87 |          while(ind2 < v2.size() && v2[ind2].first < v1[j].first) ind2++;
      |                ~~~~~^~~~~~~~~~~
cigle.cpp:88:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |          if(ind2 < v2.size() && v2[ind2].first == v1[j].first){
      |             ~~~~~^~~~~~~~~~~
cigle.cpp:107:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  107 |          while(updind < upd[r].size() && upd[r][updind].first < x){
      |                ~~~~~~~^~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 592 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 592 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 592 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 2 ms 336 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 1872 KB Output is correct
2 Correct 18 ms 2128 KB Output is correct
3 Correct 15 ms 1872 KB Output is correct
4 Correct 20 ms 1872 KB Output is correct
5 Correct 16 ms 1872 KB Output is correct
6 Correct 15 ms 2056 KB Output is correct
7 Correct 16 ms 2056 KB Output is correct
8 Correct 16 ms 1872 KB Output is correct
9 Correct 16 ms 1872 KB Output is correct
10 Correct 16 ms 2008 KB Output is correct
11 Correct 15 ms 1884 KB Output is correct
12 Correct 16 ms 1964 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 592 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 592 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 592 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 2 ms 336 KB Output is correct
21 Correct 18 ms 1872 KB Output is correct
22 Correct 18 ms 2128 KB Output is correct
23 Correct 15 ms 1872 KB Output is correct
24 Correct 20 ms 1872 KB Output is correct
25 Correct 16 ms 1872 KB Output is correct
26 Correct 15 ms 2056 KB Output is correct
27 Correct 16 ms 2056 KB Output is correct
28 Correct 16 ms 1872 KB Output is correct
29 Correct 16 ms 1872 KB Output is correct
30 Correct 16 ms 2008 KB Output is correct
31 Correct 15 ms 1884 KB Output is correct
32 Correct 16 ms 1964 KB Output is correct
33 Correct 14 ms 1872 KB Output is correct
34 Correct 14 ms 1996 KB Output is correct
35 Correct 20 ms 1872 KB Output is correct
36 Correct 17 ms 1888 KB Output is correct
37 Correct 15 ms 1872 KB Output is correct
38 Correct 16 ms 1872 KB Output is correct
39 Correct 15 ms 1648 KB Output is correct
40 Correct 12 ms 1528 KB Output is correct
41 Correct 12 ms 1360 KB Output is correct
42 Correct 12 ms 1520 KB Output is correct
43 Correct 12 ms 1360 KB Output is correct
44 Correct 13 ms 1360 KB Output is correct
45 Correct 12 ms 1360 KB Output is correct
46 Correct 11 ms 1360 KB Output is correct
47 Correct 12 ms 1360 KB Output is correct
48 Correct 11 ms 1360 KB Output is correct
49 Correct 12 ms 1360 KB Output is correct

Subtask #5
0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 592 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 592 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 592 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 2 ms 336 KB Output is correct
21 Correct 18 ms 1872 KB Output is correct
22 Correct 18 ms 2128 KB Output is correct
23 Correct 15 ms 1872 KB Output is correct
24 Correct 20 ms 1872 KB Output is correct
25 Correct 16 ms 1872 KB Output is correct
26 Correct 15 ms 2056 KB Output is correct
27 Correct 16 ms 2056 KB Output is correct
28 Correct 16 ms 1872 KB Output is correct
29 Correct 16 ms 1872 KB Output is correct
30 Correct 16 ms 2008 KB Output is correct
31 Correct 15 ms 1884 KB Output is correct
32 Correct 16 ms 1964 KB Output is correct
33 Correct 14 ms 1872 KB Output is correct
34 Correct 14 ms 1996 KB Output is correct
35 Correct 20 ms 1872 KB Output is correct
36 Correct 17 ms 1888 KB Output is correct
37 Correct 15 ms 1872 KB Output is correct
38 Correct 16 ms 1872 KB Output is correct
39 Correct 15 ms 1648 KB Output is correct
40 Correct 12 ms 1528 KB Output is correct
41 Correct 12 ms 1360 KB Output is correct
42 Correct 12 ms 1520 KB Output is correct
43 Correct 12 ms 1360 KB Output is correct
44 Correct 13 ms 1360 KB Output is correct
45 Correct 12 ms 1360 KB Output is correct
46 Correct 11 ms 1360 KB Output is correct
47 Correct 12 ms 1360 KB Output is correct
48 Correct 11 ms 1360 KB Output is correct
49 Correct 12 ms 1360 KB Output is correct
50 Execution timed out 1068 ms 141080 KB Time limit exceeded
51 Halted 0 ms 0 KB -