Submission #1068077

#	Time	Username	Problem	Language	Result	Execution time	Memory
1068077		kunzaZa183	Wombats (IOI13_wombats)	C++17	55 / 100	20073 ms	20780 KiB

wombats

#pragma GCC optimize("unroll-loops")
     
    #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[5000][200],r,c;
    int ans[200][200];
     
    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[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[x.pos.first][x.pos.second] == big) {
          dp[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);
          } 
        }
      }
     
      for(int i = 0; i < c;i++)
        ans[in][i] = dp[0][i];
    }
     
    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 ans[V2][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:26:7: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   26 |       for(int i = 0; i < r; i++)
      |       ^~~
wombats.cpp:30:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   30 |         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