Submission #116156

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
116156	2019-06-11 03:31:14	user202729	Mousetrap (CEOI17_mousetrap)	C++17	45 / 100	2840 ms	72668 KiB

mousetrap

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// https://oj.uz/problem/view/CEOI17_mousetrap
#ifndef _GLIBCXX_DEBUG
#define NDEBUG
#endif
#include<iostream>
#include<vector>
#include<queue>
#include<algorithm>
#include<functional>
#include<cassert>
int nn,trap,mouse;
std::vector<std::vector<int>> ad;
std::vector<int> par; // with root = trap
std::vector<int> nrock; // num of rock to put if mouse is trapped at [?]
// of course the mouse can only be trapped at nodes with <= 1 child (rooted somewhere)
void dfs1(int x){
  int const px=par[x];
  nrock[x]=nrock[px]+ad[x].size()-2;
  for(int child:ad[x])if(child!=px){
    par[child]=x;
    dfs1(child);
  }
}
std::vector<int> d1; // dist(?, line(trap, mouse))
std::vector<int> cost; // total cost if mouse is trapped at [?] = nrock + d1
 
 
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• Subtask 1: 20 / 20
• Subtask 2: 25 / 25
• Subtask 3: 0 / 20
• Subtask 4: 0 / 35