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Submission #28027

# Submission time Handle Problem Language Result Execution time Memory
28027 2017-07-14T21:15:47 Z sampriti Jakarta Skyscrapers (APIO15_skyscraper) C++14
0 / 100
 0 ms 237340 KB 
#include <iostream>
#include <algorithm>
#include <deque>

using namespace std;

int B[30000], P[30000];
vector<int> A[30000];
int vis[2000][30001];

int main() {
  int N, M; cin >> N >> M;

  for(int i = 0; i < M; i++) {
    cin >> B[i] >> P[i];
    A[B[i]].push_back(i);
  }

  int ans = -1;
  deque<pair<int, int> > Q;
  Q.push_back({B[0], M});
  vis[B[0]][M] = 1;

  while(!Q.empty()) {
    auto it = Q.front(); Q.pop_front();
    int i = it.first, j = it.second;

    if(i == B[1]) {
      ans = vis[i][j];
      break;
    }

    if(j == M) {
      for(int k: A[i]) {
        if(!vis[i][k]) {
          vis[i][k] = vis[i][j];
          Q.push_front({i, k});
        }
      }
    }
    else {
      if(i - P[j] >= 0 && !vis[i - P[j]][j]) {
        vis[i - P[j]][j] = vis[i][j] + 1;
        Q.push_back({i - P[j], j});
      }

      if(i + P[j] < N && !vis[i + P[j]][j]) {
        vis[i + P[j]][j] = vis[i][j] + 1;
        Q.push_back({i + P[j], j});
      }

      if(!vis[i][M]) {
        vis[i][M] = vis[i][j];
        Q.push_front({i, M});
      }
    }
  }

  cout << ans - 1 << endl;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 237340 KB Output is correct
2 Correct 0 ms 237340 KB Output is correct
3 Correct 0 ms 237340 KB Output is correct
4 Incorrect 0 ms 237340 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 237340 KB Output is correct
2 Correct 0 ms 237340 KB Output is correct
3 Correct 0 ms 237340 KB Output is correct
4 Incorrect 0 ms 237340 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 237340 KB Output is correct
2 Correct 0 ms 237340 KB Output is correct
3 Correct 0 ms 237340 KB Output is correct
4 Incorrect 0 ms 237340 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 237340 KB Output is correct
2 Correct 0 ms 237340 KB Output is correct
3 Correct 0 ms 237340 KB Output is correct
4 Incorrect 0 ms 237340 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 237340 KB Output is correct
2 Correct 0 ms 237340 KB Output is correct
3 Correct 0 ms 237340 KB Output is correct
4 Incorrect 0 ms 237340 KB Output isn't correct
5 Halted 0 ms 0 KB -