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Submission #1035934

# Submission time Handle Problem Language Result Execution time Memory
1035934 2024-07-26T19:44:25 Z pera Divide and conquer (IZhO14_divide) C++17
100 / 100
 130 ms 7736 KB 
#include<bits/stdc++.h>
#define int long long
using namespace std;
const int N = 1e5 + 100;
int n , ans = 0 , SZ;
vector<int> x(N) , g(N) , e(N) , sum_e(N) , sum_g(N);
void solve(int l , int r){
   if(l > r){
      return;
   }
   int m = (l + r) / 2;
   for(int i = l;i <= r;i ++){
      sum_e[i] = sum_e[i - 1] + e[i];
      sum_g[i] = sum_g[i - 1] + g[i];
   }
   vector<pair<int , int>> u;
   for(int i = l;i <= r;i ++){
      if(i < m){
         u.push_back({sum_e[i - 1] - x[i] , i});
      }else{
         u.push_back({sum_e[i] - x[i] , i});
      }
   }
   sort(u.begin() , u.end());
   int mn = 1e15;
   for(auto [_value , id] : u){
      if(id < m){
         mn = min(mn , sum_g[id - 1]);
      }else{
         ans = max(ans , sum_g[id] - mn);
         if(sum_e[id] - sum_e[m - 1] >= x[id] - x[m]){
            ans = max(ans , sum_g[id] - sum_g[m - 1]);
         }
      }
   }
   for(int i = l;i <= r;i ++){
      sum_e[i] = sum_g[i] = 0;
   }
   solve(l , m - 1);
   solve(m + 1 , r);
}
main(){
   cin >> n;
   for(int i = 1;i <= n;i ++){
      cin >> x[i] >> g[i] >> e[i];
   }
   x[n + 1] = 1e15;
   x[0] = -1e15;
   solve(1 , n);
   cout << ans << endl;
}

Compilation message

divide.cpp:42:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   42 | main(){
      | ^~~~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4184 KB Output is correct
2 Correct 2 ms 4188 KB Output is correct
3 Correct 2 ms 4188 KB Output is correct
4 Correct 2 ms 4188 KB Output is correct
5 Correct 2 ms 4184 KB Output is correct
6 Correct 3 ms 4188 KB Output is correct
7 Correct 2 ms 4188 KB Output is correct
8 Correct 2 ms 4188 KB Output is correct
9 Correct 2 ms 4188 KB Output is correct
10 Correct 2 ms 4188 KB Output is correct
11 Correct 2 ms 4188 KB Output is correct
12 Correct 2 ms 4188 KB Output is correct

Subtask #2
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4184 KB Output is correct
2 Correct 2 ms 4188 KB Output is correct
3 Correct 2 ms 4188 KB Output is correct
4 Correct 2 ms 4188 KB Output is correct
5 Correct 2 ms 4184 KB Output is correct
6 Correct 3 ms 4188 KB Output is correct
7 Correct 2 ms 4188 KB Output is correct
8 Correct 2 ms 4188 KB Output is correct
9 Correct 2 ms 4188 KB Output is correct
10 Correct 2 ms 4188 KB Output is correct
11 Correct 2 ms 4188 KB Output is correct
12 Correct 2 ms 4188 KB Output is correct
13 Correct 2 ms 4188 KB Output is correct
14 Correct 2 ms 4188 KB Output is correct
15 Correct 2 ms 4188 KB Output is correct
16 Correct 2 ms 4188 KB Output is correct
17 Correct 2 ms 4188 KB Output is correct
18 Correct 3 ms 4188 KB Output is correct
19 Correct 2 ms 4188 KB Output is correct
20 Correct 2 ms 4188 KB Output is correct
21 Correct 3 ms 4188 KB Output is correct
22 Correct 3 ms 4184 KB Output is correct
23 Correct 5 ms 4444 KB Output is correct
24 Correct 5 ms 4444 KB Output is correct

Subtask #3
52.0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4184 KB Output is correct
2 Correct 2 ms 4188 KB Output is correct
3 Correct 2 ms 4188 KB Output is correct
4 Correct 2 ms 4188 KB Output is correct
5 Correct 2 ms 4184 KB Output is correct
6 Correct 3 ms 4188 KB Output is correct
7 Correct 2 ms 4188 KB Output is correct
8 Correct 2 ms 4188 KB Output is correct
9 Correct 2 ms 4188 KB Output is correct
10 Correct 2 ms 4188 KB Output is correct
11 Correct 2 ms 4188 KB Output is correct
12 Correct 2 ms 4188 KB Output is correct
13 Correct 2 ms 4188 KB Output is correct
14 Correct 2 ms 4188 KB Output is correct
15 Correct 2 ms 4188 KB Output is correct
16 Correct 2 ms 4188 KB Output is correct
17 Correct 2 ms 4188 KB Output is correct
18 Correct 3 ms 4188 KB Output is correct
19 Correct 2 ms 4188 KB Output is correct
20 Correct 2 ms 4188 KB Output is correct
21 Correct 3 ms 4188 KB Output is correct
22 Correct 3 ms 4184 KB Output is correct
23 Correct 5 ms 4444 KB Output is correct
24 Correct 5 ms 4444 KB Output is correct
25 Correct 5 ms 4444 KB Output is correct
26 Correct 8 ms 4700 KB Output is correct
27 Correct 10 ms 4672 KB Output is correct
28 Correct 61 ms 5828 KB Output is correct
29 Correct 56 ms 5832 KB Output is correct
30 Correct 104 ms 7620 KB Output is correct
31 Correct 85 ms 7668 KB Output is correct
32 Correct 83 ms 7732 KB Output is correct
33 Correct 84 ms 7644 KB Output is correct
34 Correct 102 ms 7620 KB Output is correct
35 Correct 89 ms 7664 KB Output is correct
36 Correct 130 ms 7736 KB Output is correct