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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#121592#4778. Tracking RFIDsmomoyuuWA 309ms16144kbC++173.1kb2023-07-08 15:08:552023-07-08 15:08:56

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2023-07-08 15:08:56]
  • 评测
  • 测评结果:WA
  • 用时:309ms
  • 内存:16144kb
  • [2023-07-08 15:08:55]
  • 提交

answer


#include<bits/stdc++.h>
using namespace std;
using ll = long long;


ll ccw(pair<ll,ll> a,pair<ll,ll> b,pair<ll,ll> c){
    ll na = b.first - a.first;
    ll nb = b.second - a.second;
    ll ma = c.first - a.first;
    ll mb = c.second - a.second;
    if(na*mb-nb*ma>0) return 1;
    if(na*mb-nb*ma<0) return -1;
    if(na*ma+nb*mb<0) return 2;
    if(na*na+nb*nb<ma*ma+mb*mb) return -2;
    return 0;
}

bool ch(ll x1,ll y1,ll x2,ll y2,ll x3,ll y3,ll x4,ll y4){
	ll tc = (x1-x2)*(y3-y1) + (y1-y2)*(x1-x3);
	ll td = (x1-x2)*(y4-y1) + (y1-y2)*(x1-x4);
	return tc*td<0;
}
    
void solve(){
    ll s,r,w,p;
    cin>>s>>r>>w>>p;
    ll mask = 10040 + 100;
    vector<set<ll>> d(30000);
    for(int i = 0;i<s;i++){
        ll x,y;
        cin>>x>>y;
        d[x+mask].insert(y);
    }
    vector<ll> bx(w),by(w),ex(w),ey(w);
    for(int i = 0;i<w;i++) cin>>bx[i]>>by[i]>>ex[i]>>ey[i];
    for(int i = 0;i<p;i++){
        set<pair<ll,ll>> ans;
        ll px,py;
        cin>>px>>py;
        for(ll xx = px - r;xx <= px + r;xx++){
            ll nx = xx + mask;
            auto itr = d[nx].lower_bound(py-r);
            while(itr!=d[nx].end()){
                pair<ll,ll> now = make_pair(xx,*itr);
                ll dx = px - now.first;
                ll dy = py - now.second;
                if(dx*dx+dy*dy>r*r) break;
                if(px==xx&&py==*itr){
                    ans.insert(now);
                    itr++;
                    continue;
                }
                int cnt = 0;
                for(int j = 0;j<w;j++){
//if(ch(px,py,now.first,now.second,bx[j],by[j],ex[j],ey[j])) cnt++;
                    //if(ch(make_pair(px,py),make_pair(bx[j],by[j]),now)) continue;
                    //if(ch(make_pair(px,py),make_pair(ex[j],ey[j]),now)) continue;
                    //if(ch(make_pair(px,py),make_pair(bx[j],by[j]),make_pair(ex[j],ey[j]))&&ch(now,make_pair(bx[j],by[j]),make_pair(ex[j],ey[j]))) continue;
                    if(ccw(make_pair(px,py),now,make_pair(bx[j],by[j]))*ccw(make_pair(px,py),now,make_pair(ex[j],ey[j]))<0&&ccw(make_pair(bx[j],by[j]),make_pair(ex[j],ey[j]),make_pair(px,py))*ccw(make_pair(bx[j],by[j]),make_pair(ex[j],ey[j]),now)<0) cnt++;
                  if(ccw(make_pair(px,py),now,make_pair(bx[j],by[j]))*ccw(make_pair(px,py),now,make_pair(ex[j],ey[j]))==0&&ccw(make_pair(bx[j],by[j]),make_pair(ex[j],ey[j]),make_pair(px,py))*ccw(make_pair(bx[j],by[j]),make_pair(ex[j],ey[j]),now)==0){
                    if(px<=bx[j]&&bx[j]<=now.first) cnt++;
                  }else if(ccw(make_pair(px,py),now,make_pair(bx[j],by[j]))*ccw(make_pair(px,py),now,make_pair(ex[j],ey[j]))==0){
                    cnt++;
                  }
                }
                //cout<<cnt<<" "<<xx<<" "<<*itr<<endl;
                if(r-cnt>=0&&dx*dx+dy*dy<=(r-cnt)*(r-cnt)) ans.insert(now);
                itr++;
            }
        }
        cout<<ans.size();
        for(auto&itr:ans) cout<<" ("<<itr.first<<","<<itr.second<<")";
        cout<<endl;
    }
}

int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int t;
    cin>>t;
    while(t--){
        solve();
    }
}


Details

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Test #1:

score: 100
Accepted
time: 2ms
memory: 4568kb

input:

1
4 3 4 7
0 0
-1 3
2 3
11 5
-4 -1 5 -1
3 5 6 1
11 4 11 3
12 5 12 8
1 1
0 -2
4 4
11 2
13 5
13 7
14 5

output:

3 (-1,3) (0,0) (2,3)
1 (0,0)
0
0
1 (11,5)
0
0

result:

ok 7 lines

Test #2:

score: -100
Wrong Answer
time: 309ms
memory: 16144kb

input:

62
4 3 4 7
0 0
-1 3
2 3
11 5
-4 -1 5 -1
3 5 6 1
11 4 11 3
12 5 12 8
1 1
0 -2
4 4
11 2
13 5
13 7
14 5
3 5 0 5
0 0
5 0
8 4
0 5
2 3
2 4
3 4
5 0
3 1 0 15
-10 -42
-9 -42
-8 -42
-11 -41
-11 -42
-11 -43
-10 -41
-10 -42
-10 -43
-9 -41
-9 -42
-9 -43
-8 -41
-8 -42
-8 -43
-7 -41
-7 -42
-7 -43
5 3 0 7
0 0
-1 -3...

output:

3 (-1,3) (0,0) (2,3)
1 (0,0)
0
0
1 (11,5)
0
0
1 (0,0)
2 (0,0) (5,0)
2 (0,0) (5,0)
3 (0,0) (5,0) (8,4)
3 (0,0) (5,0) (8,4)
0
1 (-10,-42)
0
1 (-10,-42)
2 (-10,-42) (-9,-42)
1 (-10,-42)
1 (-9,-42)
3 (-10,-42) (-9,-42) (-8,-42)
1 (-9,-42)
1 (-8,-42)
2 (-9,-42) (-8,-42)
1 (-8,-42)
0
1 (-8,-42)
0
3 (-1,-3...

result:

wrong answer 80th lines differ - expected: '2 (0,5) (5,5)', found: '0'