Submission #1272053

#	Time	Username	Problem	Language	Result	Execution time	Memory
1272053		picrad	Zemljište (COCI22_zemljiste)	C++20	70 / 70	242 ms	4400 KiB

Main

#include <bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
using namespace std;
typedef long long ll;
typedef double dbl;
typedef pair<ll,ll> pii;
 
const int maxn = 5e2+5,MOD = 1e8,INF = 2e9;
ll ARR[maxn][maxn],pref[maxn][maxn],N,M,A,B,ans = INF;

int main(){
  ios::sync_with_stdio(false);
  cin.tie(NULL);
  cin >> N >> M >> A >> B;
  if(A > B) swap(A,B);
  for(int i =1; i <= N; i++){
    for(int j = 1; j <= M; j++) {
      cin >> ARR[i][j];
      pref[i][j] = ARR[i][j] + pref[i-1][j] + pref[i][j-1] - pref[i-1][j-1];
    }
  }
  for(int i = 1; i <= N; i++){
    for(int j =i; j <= N; j++){
      ll l =1, r = 1, sum = pref[j][1] - pref[i-1][1];
      while(l <= M && r <= M){
        ans = min(ans, abs(A-sum) + abs(B-sum));
        if(sum < B){
          r++;
          sum += pref[j][r] - pref[j][r-1] - pref[i-1][r] + pref[i-1][r-1];
        }else{
          sum -=( pref[j][l] - pref[j][l-1] - pref[i-1][l] + pref[i-1][l-1] );
          l++;
          if(l > r){
             r++;
             sum += pref[j][r] - pref[j][r-1] - pref[i-1][r] + pref[i-1][r-1];
          }
        }
      }
    }
  }
  cout << ans << '\n';
}

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 40 / 40