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답안 #291444

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
291444 2020-09-05T10:39:04 Z TadijaSebez Dragon 2 (JOI17_dragon2) C++11
60 / 100
 4000 ms 15864 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define pb push_back
struct pt{ll x,y;pt(ll a=0,ll b=0):x(a),y(b){}};
ll cross(pt a,pt b){return a.x*b.y-a.y*b.x;}
bool operator < (pt a,pt b){return cross(a,b)<0;}
pt operator - (pt a,pt b){return pt(a.x-b.x,a.y-b.y);}
const int N=30050;
pt pts[N],X,Y,dir[N];
pair<int,pt> ord[N];
pair<pt,int> srt[N];
int fir[N],las[N],sz[N],c[N],side[N],idx[N],n,m,q;
int Find(pair<int,pt> p){return lower_bound(ord+1,ord+1+n,p)-ord;}
vector<pii> E[N],R[N];
struct BIT{
	int sum[N];
	void init(){for(int i=0;i<N;i++)sum[i]=0;}
	BIT(){init();}
	void Add(int i,int f){for(;i<N;i+=i&-i)sum[i]+=f;}
	int Get(int i){int ans=0;for(;i;i-=i&-i)ans+=sum[i];return ans;}
	int Get(int l,int r){return Get(r)-Get(l-1);}
}BT1,BT2;
const int M=100050;
ll ans[M];
int skip[M];
int main(){
	scanf("%i %i",&n,&m);
	for(int i=1;i<=n;i++)scanf("%lld %lld %i",&pts[i].x,&pts[i].y,&c[i]);
	scanf("%lld %lld",&X.x,&X.y);
	scanf("%lld %lld",&Y.x,&Y.y);
	for(int i=1;i<=n;i++){
		side[i]=(Y-X)<(pts[i]-X);
		dir[i]=side[i]?pts[i]-Y:Y-pts[i];
		ord[i]={c[i],dir[i]};
	}
	sort(ord+1,ord+1+n);
	for(int i=1;i<=n;i++)idx[i]=Find({c[i],dir[i]});
	for(int i=1;i<=m;i++)fir[i]=Find({i,Y-X});fir[m+1]=n+1;
	for(int i=1;i<=m;i++)sz[i]=fir[i+1]-fir[i],las[i]=fir[i+1]-1;
	for(int i=1;i<=n;i++)srt[i]={side[i]?pts[i]-X:X-pts[i],i};
	sort(srt+1,srt+1+n);
	scanf("%i",&q);
	map<pii,int> was;
	for(int i=1,a,b;i<=q;i++){
		scanf("%i %i",&a,&b);
		if(was[{a,b}]){
			skip[i]=was[{a,b}];
			continue;
		}
		was[{a,b}]=i;
		//if(sz[a]<sz[b])
			E[a].pb({b,i});
		//else R[b].pb({a,i});
	}
	BT1.init();BT2.init();
	for(int i=1;i<=n;i++)if(!side[i])BT2.Add(idx[i],1);
	for(int j=1;j<=n;j++){
		int i=srt[j].second;
		for(pii qu:E[c[i]]){
			int o=Find({qu.first,dir[i]});
			ans[qu.second]+=BT1.Get(o,las[qu.first])+BT2.Get(fir[qu.first],o-1);
		}
		if(side[i])BT1.Add(idx[i],1);
		else BT2.Add(idx[i],-1);
	}
	for(int i=1;i<=q;i++)printf("%lld\n",ans[skip[i]?skip[i]:i]);
	return 0;
}

Compilation message

dragon2.cpp: In function 'int main()':
dragon2.cpp:40:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   40 |  for(int i=1;i<=m;i++)fir[i]=Find({i,Y-X});fir[m+1]=n+1;
      |  ^~~
dragon2.cpp:40:44: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   40 |  for(int i=1;i<=m;i++)fir[i]=Find({i,Y-X});fir[m+1]=n+1;
      |                                            ^~~
dragon2.cpp:29:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   29 |  scanf("%i %i",&n,&m);
      |  ~~~~~^~~~~~~~~~~~~~~
dragon2.cpp:30:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   30 |  for(int i=1;i<=n;i++)scanf("%lld %lld %i",&pts[i].x,&pts[i].y,&c[i]);
      |                       ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dragon2.cpp:31:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   31 |  scanf("%lld %lld",&X.x,&X.y);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~
dragon2.cpp:32:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   32 |  scanf("%lld %lld",&Y.x,&Y.y);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~
dragon2.cpp:44:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   44 |  scanf("%i",&q);
      |  ~~~~~^~~~~~~~~
dragon2.cpp:47:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   47 |   scanf("%i %i",&a,&b);
      |   ~~~~~^~~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 4452 KB Output is correct
2 Correct 8 ms 4480 KB Output is correct
3 Correct 32 ms 4984 KB Output is correct
4 Correct 188 ms 13560 KB Output is correct
5 Correct 141 ms 14072 KB Output is correct
6 Correct 7 ms 4608 KB Output is correct
7 Correct 7 ms 4608 KB Output is correct
8 Correct 6 ms 4480 KB Output is correct
9 Correct 5 ms 4480 KB Output is correct
10 Correct 5 ms 4480 KB Output is correct

Subtask #2
45.0 / 45.0

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 5368 KB Output is correct
2 Correct 66 ms 5412 KB Output is correct
3 Correct 40 ms 5368 KB Output is correct
4 Correct 33 ms 5368 KB Output is correct
5 Correct 36 ms 5752 KB Output is correct
6 Correct 33 ms 5376 KB Output is correct
7 Correct 32 ms 5376 KB Output is correct
8 Correct 32 ms 5368 KB Output is correct
9 Correct 26 ms 5112 KB Output is correct
10 Correct 28 ms 5120 KB Output is correct

Subtask #3
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 4452 KB Output is correct
2 Correct 8 ms 4480 KB Output is correct
3 Correct 32 ms 4984 KB Output is correct
4 Correct 188 ms 13560 KB Output is correct
5 Correct 141 ms 14072 KB Output is correct
6 Correct 7 ms 4608 KB Output is correct
7 Correct 7 ms 4608 KB Output is correct
8 Correct 6 ms 4480 KB Output is correct
9 Correct 5 ms 4480 KB Output is correct
10 Correct 5 ms 4480 KB Output is correct
11 Correct 37 ms 5368 KB Output is correct
12 Correct 66 ms 5412 KB Output is correct
13 Correct 40 ms 5368 KB Output is correct
14 Correct 33 ms 5368 KB Output is correct
15 Correct 36 ms 5752 KB Output is correct
16 Correct 33 ms 5376 KB Output is correct
17 Correct 32 ms 5376 KB Output is correct
18 Correct 32 ms 5368 KB Output is correct
19 Correct 26 ms 5112 KB Output is correct
20 Correct 28 ms 5120 KB Output is correct
21 Correct 38 ms 5400 KB Output is correct
22 Correct 67 ms 5420 KB Output is correct
23 Correct 365 ms 5808 KB Output is correct
24 Correct 966 ms 14904 KB Output is correct
25 Correct 238 ms 15352 KB Output is correct
26 Correct 204 ms 15864 KB Output is correct
27 Correct 54 ms 7552 KB Output is correct
28 Correct 55 ms 7544 KB Output is correct
29 Execution timed out 4066 ms 15248 KB Time limit exceeded
30 Halted 0 ms 0 KB -