Submission #337265

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
337265	2020-12-19T06:04:21 Z	boykut	Divide and conquer (IZhO14_divide)	C++14	17 / 100	2 ms	384 KB

divide

#include <bits/stdc++.h>

using namespace std;

#define int long long
#define MAXN 100000

int x[MAXN], g[MAXN], d[MAXN], n;
int prg[MAXN], prd[MAXN];
int ans = 0;

bool can (int GOLD) {
   for (int l = 0; l < n; l++) {
      int r = lower_bound(prg, prg + n, (l?prg[l-1]:0) + GOLD) - prg;
      if (r >= 0 && r < n) {
         if (x[r] - x[l] <= prd[r] - (l?prd[l-1]:0)) {
            ans = max(ans, prg[r] - (l?prg[l-1]:0));
            return true;
         }
      }
   }
   return false;
}

signed main() {
   //ios::sync_with_stdio(0);
   //cin.tie(0);
   
   cin >> n;
   
   for (int i = 0; i < n; i++) {
      cin >> x[i] >> g[i] >> d[i];
   }
   for (int i = 0; i < n; i++) {
      prg[i] = g[i];
      prd[i] = d[i];
      if (i)
         prg[i] += prg[i - 1],
         prd[i] += prd[i - 1];
   }
   
   int l = 0, r = prg[n - 1];
   while (l <= r) {
      int GOLD = (l + r) / 2;
      if (can (GOLD)) {
         l = GOLD + 1;
      } else {
         r = GOLD - 1;
      }
   }
   
   cout << ans << '\n';
   
   return 0;
}

Subtask #1

17.0 / 17.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	0 ms	364 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	0 ms	364 KB	Output is correct
5	Correct	1 ms	364 KB	Output is correct
6	Correct	1 ms	364 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	384 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct

Subtask #2

0 / 31.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	0 ms	364 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	0 ms	364 KB	Output is correct
5	Correct	1 ms	364 KB	Output is correct
6	Correct	1 ms	364 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	384 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	384 KB	Output is correct
15	Correct	1 ms	364 KB	Output is correct
16	Incorrect	2 ms	364 KB	Output isn't correct
17	Halted	0 ms	0 KB	-

Subtask #3

0 / 52.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	0 ms	364 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	0 ms	364 KB	Output is correct
5	Correct	1 ms	364 KB	Output is correct
6	Correct	1 ms	364 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	384 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	384 KB	Output is correct
15	Correct	1 ms	364 KB	Output is correct
16	Incorrect	2 ms	364 KB	Output isn't correct
17	Halted	0 ms	0 KB	-