Submission #1035925

#	Time	Username	Problem	Language	Result	Execution time	Memory
1035925		pera	Divide and conquer (IZhO14_divide)	C++17	17 / 100	1060 ms	2908 KiB

divide

#include<bits/stdc++.h>
#define int long long
using namespace std;
const int N = 1e5 + 1;
int n , ans = 0;
vector<int> x(N) , g(N) , d(N);
void solve(int l , int r){
   if(l > r){
      return;
   }
   int m = (l + r) / 2;
   for(int L = l;L <= m;L ++){
      for(int R = m;R <= r;R ++){
         int e = 0 , s = 0;
         for(int i = L;i <= R;i ++){
            e += d[i];
            s += g[i];
         }
         if(e == x[R] - x[L] + 1){
            ans = max(ans , s);
         }
      }
   }
   solve(l , m - 1);
   solve(m + 1 , r);
}
main(){
   cin >> n;
   for(int i = 1;i <= n;i ++){
      cin >> x[i] >> g[i] >> d[i];
   }
   x[n + 1] = 1e15;
   x[0] = -1e15;
   //solve(1 , n);
   for(int L = 1;L <= n;L ++){
      for(int R = L;R <= n;R ++){
         int s = 0 , e = 0;
         for(int i = L;i <= R;i ++){
            e += d[i];
            s += g[i];
         }
         if(x[R + 1] - x[L - 1] >= e && e >= x[R] - x[L]){
            ans = max(ans , s);
         }
      }
   }
   cout << ans << endl;
}

Compilation message (stderr)

divide.cpp:27:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   27 | main(){
      | ^~~~

• Subtask 1: 17 / 17
• Subtask 2: 0 / 31
• Subtask 3: 0 / 52