Hämähäkit

input/code.cpp: In function 'bool go(int, int)':
input/code.cpp:50:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=0; i<tie[c].size(); ++i){
                    ^
input/code.cpp:56:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i=0; i<tie[c].size(); ++i){
                  ^

#include <iostream>
#include <vector>
#include <algorithm>
#include <math.h>
#define F first
#define S second
using namespace std;

int n, m, w;

vector<pair<int, int> > nd;
int nix[101010];

vector<int> tie[101010];
long double angle[101010];

bool unav[101010];


#define PI 3.14159265358979l
long double ad;
long double ang(int x, int y){
  long double a=atan2(x, y)+ad;
  if (a<0) a+=2*PI;
  if (a>2*PI) a-=2*PI;
  return a;
}

int srt_c;
bool srt(int a, int b){
  return ang(nd[a].F-nd[srt_c].F, nd[a].S-nd[srt_c].S)<ang(nd[b].F-nd[srt_c].F, nd[b].S-nd[srt_c].S);
}
bool fsrt(int a, int b){
  return angle[a]<angle[b];
}

bool go(int c, int p){
  if (unav[c]) return 0;
  unav[c]=1;
  if (nd[c].F==w) return 1;
  
  if (c && tie[c].size()>1){
    srt_c=c;
    int dx=nd[p].F-nd[c].F;
    int dy=nd[p].S-nd[c].S;
    ad=0;
    long double a=ang(dx, dy);
    ad=2.0*PI-a;
    
    for (int i=0; i<tie[c].size(); ++i){
      int a=tie[c][i];
      angle[a]=ang(nd[a].F-nd[c].F, nd[a].S-nd[c].S);
    }
    sort(tie[c].begin(), tie[c].end(), fsrt);
  }
  for (int i=0; i<tie[c].size(); ++i){
    if (unav[tie[c][i]]) continue;
    if (go(tie[c][i], c)) return 1;
  }
  return 0;
}





int main(){
  cin >> n >> m >> w;
  nd.push_back(make_pair(-1, 0));
  for (int i=1; i<=n; ++i){
    int x, y;
    cin >> x >> y;
    nd.push_back(make_pair(x, y));
  }
  
  for (int i=0; i<m; ++i){
    int a, b;
    cin >> a >> b;
    tie[a].push_back(b);
    tie[b].push_back(a);
  }
  for (int i=1; i<=n; ++i){
    if (nd[i].F==0){
      tie[0].push_back(i);
      tie[i].push_back(0);
    }
  }
  
  ad=0;
  srt_c=0;
  sort(tie[0].begin(), tie[0].end(), srt);

  int ans=0;
  while (go(0, 0)){
    unav[0]=0;
    ++ans; 
  }
  cout << ans << endl;
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 1

Verdict: ACCEPTED

Test 7

Group: 1

Verdict: ACCEPTED

Test 8

Group: 1

Verdict: ACCEPTED

Test 9

Group: 1

Verdict: ACCEPTED

Test 10

Group: 1

Verdict: ACCEPTED

Test 11

Group: 1

Verdict: ACCEPTED

Test 12

Group: 1

Verdict: ACCEPTED

Test 13

Group: 1

Verdict: ACCEPTED

Test 14

Group: 1

Verdict: ACCEPTED

Test 15

Group: 1

Verdict: ACCEPTED

Test 16

Group: 1

Verdict: ACCEPTED

Test 17

Group: 1

Verdict: ACCEPTED

Test 18

Group: 1

Verdict: ACCEPTED

Test 19

Group: 1

Verdict: ACCEPTED

Test 20

Group: 1

Verdict: ACCEPTED

Test 21

Group: 1

Verdict: ACCEPTED

Test 22

Group: 1

Verdict: ACCEPTED

Test 23

Group: 2

Verdict: ACCEPTED

Test 24

Group: 2

Verdict: ACCEPTED

Test 25

Group: 2

Verdict: ACCEPTED

Test 26

Group: 2

Verdict: ACCEPTED

Test 27

Group: 2

Verdict: ACCEPTED

Test 28

Group: 2

Verdict: ACCEPTED

Test 29

Group: 2

Verdict: ACCEPTED

Test 30

Group: 2

Verdict: ACCEPTED

Test 31

Group: 2

Verdict: ACCEPTED

Test 32

Group: 2

Verdict: ACCEPTED

Test 33

Group: 2

Verdict: ACCEPTED

Test 34

Group: 2

Verdict: ACCEPTED

Test 35

Group: 2

Verdict: ACCEPTED

Test 36

Group: 2

Verdict: ACCEPTED

Test 37

Group: 2

Verdict: ACCEPTED

Test 38

Group: 2

Verdict: ACCEPTED

Test 39

Group: 2

Verdict: ACCEPTED

Test 40

Group: 2

Verdict: ACCEPTED

Test 41

Group: 2

Verdict: ACCEPTED

Test 42

Group: 2

Verdict: ACCEPTED

Test 43

Group: 2

Verdict: ACCEPTED

Test 44

Group: 2

Verdict: ACCEPTED

Test 45

Group: 3

Verdict: ACCEPTED

Test 46

Group: 3

Verdict: ACCEPTED

Test 47

Group: 3

Verdict: ACCEPTED

Test 48

Group: 3

Verdict: ACCEPTED

Test 49

Group: 3

Verdict: ACCEPTED

Test 50

Group: 3

Verdict: ACCEPTED

Test 51

Group: 3

Verdict: ACCEPTED

Test 52

Group: 3

Verdict: ACCEPTED

Test 53

Group: 3

Verdict: ACCEPTED

Test 54

Group: 3

Verdict: ACCEPTED

Test 55

Group: 3

Verdict: ACCEPTED

Test 56

Group: 3

Verdict: ACCEPTED

Test 57

Group: 3

Verdict: ACCEPTED

Test 58

Group: 3

Verdict: ACCEPTED

Test 59

Group: 3

Verdict: ACCEPTED

Test 60

Group: 3

Verdict: ACCEPTED

Test 61

Group: 3

Verdict: ACCEPTED

Test 62

Group: 3

Verdict: ACCEPTED

Test 63

Group: 3

Verdict: ACCEPTED

Test 64

Group: 3

Verdict: ACCEPTED

Test 65

Group: 3

Verdict: ACCEPTED

Test 66

Group: 3

Verdict: TIME LIMIT EXCEEDED