oj.uz

Submission #222027

# Submission time Handle Problem Language Result Execution time Memory
222027 2020-04-11T22:22:22 Z Haunted_Cpp Pohlepko (COCI16_pohlepko) C++17
80 / 80
 73 ms 19960 KB 
/*
 author: Haunted_Cpp
 "Persistence guarantees that results are inevitable"
*/
 
#include <iostream>
#include <algorithm>
#include <vector>
#include <queue>
 
#pragma GCC optimize ("Ofast")
#pragma GCC target("fma,sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#pragma GCC optimize("unroll-loops")
 
using namespace std;
 
const int N = 2e3 + 5;

int step [N][N];
char g [N][N];
char dist [2 * N];

const int dr [] = {+0, +1};
const int dc [] = {+1, +0};

int main () {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int r, c;
  cin >> r >> c;
  for (int i = 0; i < r; i++) {
    for (int j = 0; j < c; j++) {
      cin >> g[i][j];
      step[i][j] = -1;
    }
  }
  for (int i = 0; i < 2 * N; i++) dist[i] = 'z';
  const int K = r + c - 1;
  dist[0] = g[0][0];
  step[0][0] = 0;
  queue<pair<int, int> > q;
  q.push({0, 0});
  while (!q.empty()) {
    int linha = q.front().first;
    int coluna = q.front().second;
    q.pop();
    if (g[linha][coluna] != dist[step[linha][coluna]]) continue;
    for (int i = 0; i < 2; i++) {
      if (linha + dr[i] < 0 || linha + dr[i] >= r || coluna < 0 || coluna + dc[i] >= c) continue;
      if (step[linha + dr[i]][coluna + dc[i]] != -1) continue;
      step[linha + dr[i]][coluna + dc[i]] = step[linha][coluna] + 1;
      dist[step[linha + dr[i]][coluna + dc[i]]] = min (dist[step[linha + dr[i]][coluna + dc[i]]], g[linha + dr[i]][coluna + dc[i]]);
      q.push({linha + dr[i], coluna + dc[i]});
    }
  }
  for (int i = 0; i < K; i++) cout << dist[i];
  cout << '\n';
  return 0;
}

Subtask #1
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 6 ms 3328 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 640 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 9 ms 3328 KB Output is correct
7 Correct 30 ms 13440 KB Output is correct
8 Correct 73 ms 19960 KB Output is correct
9 Correct 5 ms 1024 KB Output is correct
10 Correct 6 ms 1792 KB Output is correct
11 Correct 7 ms 1536 KB Output is correct
12 Correct 12 ms 7552 KB Output is correct
13 Correct 13 ms 13056 KB Output is correct
14 Correct 73 ms 19960 KB Output is correct
15 Correct 5 ms 1024 KB Output is correct
16 Correct 43 ms 15104 KB Output is correct