Submission #1059679

#	Time	Username	Problem	Language	Result	Execution time	Memory
1059679		NeroZein	Netrpeljivost (COI23_netrpeljivost)	C++17	0 / 100	1 ms	348 KiB

Main

#include "bits/stdc++.h"
using namespace std;

#ifdef Nero
#include "Deb.h"
#else
#define debug(...)
#endif

const int N = 2050;
const long long INF = 1e16;

int a[N][N];
long long dp[N][N];

void build(int nd, int l, int r) {
  if (l == r) {
    return;
  }
  int mid = (l + r) >> 1;
  build(nd * 2, l, mid);
  build(nd * 2 + 1, mid + 1, r); 
  for (int i = l; i <= r; ++i) {
    dp[nd][i] = INF;
  }
  for (int i = l; i <= mid; ++i) {
    for (int j = mid + 1; j <= r; ++j) {
      dp[nd][i] = min(dp[nd][i], dp[nd * 2][i] + dp[nd * 2 + 1][j] + a[i][j]);      
    }
  }
  for (int i = mid + 1; i <= r; ++i) {
    for (int j = l; j <= mid; ++j) {
      dp[nd][i] = min(dp[nd][i], dp[nd * 2][j] + dp[nd * 2 + 1][i] + a[i][j]); 
    }
  }
}

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int n;
  cin >> n;
  for (int i = 1; i <= n; ++i) {
    for (int j = 1; j <= n; ++j) {
      cin >> a[i][j];
    }
  }
  build(1, 1, n);
  long long ans = INF;
  for (int i = 1; i <= n; ++i) {
    ans = min(ans, dp[1][i]);
  }
  cout << ans << '\n';
  return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 17
• Subtask 3: 0 / 32
• Subtask 4: 0 / 41