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  1. //Lib
  2. #include<cstdio>
  3. #include<cstring>
  4. #include<cstdlib>
  5. #include<cmath>
  6. #include<ctime>
  7.  
  8. #include<iostream>
  9. #include<algorithm>
  10. #include<vector>
  11. #include<string>
  12. #include<queue>
  13. #include<set>
  14. #include<map>
  15. using namespace std;
  16. //Macro
  17. #define rep(i,a,b)  for(int i=a,tt=b;i<=tt;++i)
  18. #define drep(i,a,b) for(int i=a,tt=b;i>=tt;--i)
  19. #define erep(i,e,x) for(int i=x;i;i=e[i].next)
  20. #define irep(i,x)   for(__typeof(x.begin()) i=x.begin();i!=x.end();i++)
  21. #define read()  (strtol(ipos,&ipos,10))
  22. #define sqr(x)  ((x)*(x))
  23. #define pb  push_back
  24. #define PS  system("pause");
  25. typedef long long   ll;
  26. typedef pair<int,int> pii;
  27. const int oo=~0U>>1;
  28. const double inf=1e100;
  29. const double eps=1e-6;
  30. string name="", in=".in", out=".out";
  31. //Var
  32. int n,m,ans;
  33. int f[10008];
  34. struct Mouse
  35. {
  36.     int time,x,y;
  37. }mouse[10008];
  38. int dis(Mouse x,Mouse y){return abs(x.x-y.x)+abs(x.y-y.y);}
  39. void Init()
  40. {
  41.     int t,x,y;
  42.     scanf("%d%d",&n,&m);
  43.     rep(i,1,m)
  44.     {
  45.         scanf("%d%d%d",&t,&x,&y);
  46.         mouse[i].time=t;mouse[i].x=x;mouse[i].y=y;
  47.     }
  48. }
  49. void Work()
  50. {
  51.     rep(i,1,m)
  52.     {
  53.         f[i]=1;
  54.         rep(j,1,i-1)
  55.         {
  56.             if(dis(mouse[i],mouse[j])<=mouse[i].time-mouse[j].time)
  57.                 f[i]=max(f[i],f[j]+1);
  58.         }
  59.     }
  60.     rep(i,1,m)ans=max(ans,f[i]);
  61.     cout<<ans<<endl;
  62. }
  63. int main()
  64. {
  65. //  freopen((name+in).c_str(),"r",stdin);
  66. //  freopen((name+out).c_str(),"w",stdout);
  67.     Init();
  68.     Work();
  69.     return 0;
  70. }
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https://ideone.com/Opul8
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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