Submission #1067999

#	Time	Username	Problem	Language	Result	Execution time	Memory
1067999		kunzaZa183	Wombats (IOI13_wombats)	C++17	55 / 100	13912 ms	262144 KiB

wombats

#include "wombats.h"
#include <bits/stdc++.h>
#include <utility>
using namespace std;


struct qry{
  pair<int,int> pos;
  int w;
  bool operator<(qry x) const{
    return w > x.w;
  }
};

int hori[5000][200],verti[5000][200];
int dp[200][5000][200],r,c;

bitset<200> alrdid;

const int big = 1e9+7;
void dij(int a,int b,int in){
  priority_queue<qry> pq;
  for(int i = 0; i < r; i++)
    for(int j = 0; j< c;j++)
      dp[in][i][j] = big;

    qry tmp;
    tmp.pos = {a,b};
    tmp.w = 0;
    pq.push(tmp);

  while(!pq.empty()) {
    qry x = pq.top();
    pq.pop();
    if(dp[in][x.pos.first][x.pos.second] == big) {
      dp[in][x.pos.first][x.pos.second] = x.w;
      qry sth;
      if(x.pos.second!=0) {
        sth.pos = {x.pos.first,x.pos.second - 1};
        sth.w = hori[sth.pos.first][sth.pos.second] + x.w;
        pq.push(sth);
      }
      if(x.pos.second != c - 1) {
        sth.pos = {x.pos.first, x.pos.second + 1};
        sth.w = hori[x.pos.first][x.pos.second] + x.w;
        pq.push(sth);
      }
      if(x.pos.first != 0) {
        sth.pos = {x.pos.first - 1,x.pos.second};
        sth.w = verti[sth.pos.first][sth.pos.second] + x.w;
        pq.push(sth);
      } 
    }
  }
}

void init(int R, int C, int H[5000][200], int V[5000][200]) {
  r = R, c= C;
  for(int i =0; i < R;i++)
    for(int j = 0; j < C;j++)
      hori[i][j] = H[i][j], verti[i][j] = V[i][j];
  alrdid.reset();
}



void changeH(int P, int Q, int W) {
  hori[P][Q] = W;
  alrdid.reset();
}

void changeV(int P, int Q, int W) {
  verti[P][Q] = W;
  alrdid.reset();
}

int escape(int V1, int V2) {
  if(!alrdid[V2])
    dij(r-1,V2,V2);
  alrdid[V2] = 1;
  return dp[V2][0][V1];
}

Compilation message (stderr)

grader.c: In function 'int main()':
grader.c:15:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
   15 |  int res;
      |      ^~~
wombats.cpp: In function 'void dij(int, int, int)':
wombats.cpp:23:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   23 |   for(int i = 0; i < r; i++)
      |   ^~~
wombats.cpp:27:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   27 |     qry tmp;
      |     ^~~

• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 16 / 16
• Subtask 4: 18 / 18
• Subtask 5: 0 / 21
• Subtask 6: 0 / 24