Submission #989280

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
989280	2024-05-27 21:14:33	AdamGS	Mountains (IOI17_mountains)	C++17	0 / 100	1 ms	4444 KiB

mountains

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#include "mountains.h"
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(a, b) for(int a = 0; a < (b); ++a)
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(), a.end()
const int LIM=2e3+7;
pair<int,int>ma1[LIM][LIM], ma2[LIM][LIM];
ll T[LIM];
int dp[LIM][LIM], odw[LIM][LIM], n;
int ilo(int a, int b, int c) {
  pair<ll,ll>x={b-a, T[b]-T[a]}, y={c-a, T[c]-T[a]};
  return x.st*y.nd-x.nd*y.st;
}
int solve(int l, int r) {
  if(l>r) return 0;
  if(odw[l][r]) return dp[l][r];
  odw[l][r]=1;
  if(ma1[l][r].nd!=-ma2[l][r].nd) {
    dp[l][r]=max(solve(l, -ma2[l][r].nd-1)+solve(-ma2[l][r].nd+1, r), solve(l, ma1[l][r].nd-1)+solve(ma1[l][r].nd+1, r));
    return dp[l][r];
  }
  int x=ma1[l][r].nd;
  dp[l][r]=solve(l, x-1)+solve(x+1, r);
  int sum=1, lst=x+1;
  for(int i=x+2; i<=r; ++i) {
    if(ilo(x, lst, i)>=0) {
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

• Subtask 1: 0 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 30
• Subtask 4: 0 / 30