Submission #336638

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
336638	2020-12-16 07:16:14	super_j6	Nafta (COI15_nafta)	C++14	100 / 100	560 ms	90732 KiB

nafta

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#include <iostream>
#include <cstdio>
#include <algorithm>
#include <string.h>
using namespace std;
#define endl '\n'
#define ll long long
#define pi pair<int, int>
#define f first
#define s second
const int mxn = 2002, mxk = mxn * mxn, w = 2;
const int dx[w] = {1, 0};
const int dy[w] = {0, 1};
int n, m, k;
int s[mxk], l[mxk], r[mxk], par[mxk], rnk[mxk];
int a[mxn][mxn], f[mxn][mxn], dp[mxn], p[mxn];
int fnd(int x){
  return x == par[x] ? x : par[x] = fnd(par[x]);
}
int sol(int x, int y, int l, int r){
  if(l > r) return 0;
  int mid = (l + r) / 2, z = x;
  for(int i = x; i <= min(y, mid - 1); i++){
    int dd = p[i] + f[mid][mid] - f[i][mid];
    if(dd > dp[mid]) dp[mid] = dd, z = i;
  }
  return max({dp[mid], sol(x, z, l, mid - 1), sol(z, y, mid + 1, r)});
 
 
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• Subtask 1: 11 / 11
• Subtask 2: 23 / 23
• Subtask 3: 66 / 66