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답안 #27278

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
27278 2017-07-12T07:00:45 Z khsoo01 Dragon 2 (JOI17_dragon2) C++11
60 / 100
 779 ms 262144 KB 
#include<bits/stdc++.h>
#define X first
#define Y second
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pll;

ll n, m, q, s1, s2, ans[100005];
pll p1, p2, qry[100005], piv;

map<pll, ll> mem;
vector<ll> z1, z2;
vector<pll> drg[30005], cp, pt;

struct data {pll s[2], e[2]; ll i;};
vector<data> rd[30005];

struct sweep {ll s, e, x, i;};
vector<sweep> swp[1111111];

struct segtree {
	ll v[2222222], lim;
	void init () {
		for(lim=1;lim<=s2;lim<<=1);
		for(ll i=2*lim;--i;) v[i] = 0;
	}
	void upd (ll P, ll V) {
		P += lim;
		while(P) {v[P] += V; P >>= 1;}
	}
	ll get (ll S, ll E) {
		S += lim; E += lim;
		ll ret = 0;
		while(S <= E) {
			if(S%2==1) ret += v[S++];
			if(E%2==0) ret += v[E--];
			S >>= 1; E >>= 1;
		}
		return ret;
	}
} seg;

ll ccw (const pll &A, const pll &B, const pll &C) {
	return (A.X*B.Y+B.X*C.Y+C.X*A.Y) - (A.Y*B.X+B.Y*C.X+C.Y*A.X);
}

bool isup (const pll &A, const pll &B) {
	return (A.Y < B.Y || (A.Y == B.Y && A.X < B.X));
}

bool cmp (const pll &A, const pll &B) {
	bool F1 = isup(piv, A), F2 = isup(piv, B);
	if(F1 != F2) return F1;
	return ccw(piv, A, B) > 0;
}

void cpr (pll &P, vector<pll> &D, vector<data> &R, int O, vector<ll> &V, ll &S) {
	cp.clear(); V.clear(); piv = P;
	for(auto &T : D) cp.push_back(T);
	for(auto &T : R) {
		cp.push_back(T.s[O]);
		cp.push_back(T.e[O]);
	}
	sort(cp.begin(), cp.end(), cmp);
	cp.erase(unique(cp.begin(), cp.end()), cp.end());
	S = cp.size();
	for(auto &T : D) {
		V.push_back(lower_bound(cp.begin(), cp.end(), T, cmp) - cp.begin() + 1);
	}
	for(auto &T : R) {
		T.s[O].X = lower_bound(cp.begin(), cp.end(), T.s[O], cmp) - cp.begin() + 1;
		T.e[O].X = lower_bound(cp.begin(), cp.end(), T.e[O], cmp) - cp.begin() + 1;
	}
}

void add (ll XS, ll XE, ll YS, ll YE, ll I) {
	if(XS > XE) {
		add(XS, s1, YS, YE, I);
		add(1, XE, YS, YE, I);
	}
	else if(YS > YE) {
		add(XS, XE, YS, s2, I);
		add(XS, XE, 1, YE, I);
	}
	else {
		swp[XE].push_back({YS, YE, 1, I});
		swp[XS-1].push_back({YS, YE, -1, I});
	}
}

pll Flip (const pll &A, const pll &B) {
	return pll(2*A.X - B.X, 2*A.Y - B.Y);
}

void sadi (ll S, ll M, ll I) {
	for(auto &T : drg[S]) {
		data C; C.i = I;
		C.s[0] = T; C.e[0] = Flip(p1, T);
		if(ccw(p1, C.s[0], p2) < 0) swap(C.s[0], C.e[0]);
		C.s[1] = T; C.e[1] = Flip(p2, T);
		if(ccw(p2, C.s[1], p1) < 0) swap(C.s[1], C.e[1]);
		rd[M].push_back(C);
	}
}

void majo (ll S, ll M, ll I) {
	for(auto &T : drg[M]) {
		data C; C.i = I;
		C.s[0] = p2; C.e[0] = Flip(p1, T);
		if(ccw(p1, C.s[0], C.e[0]) < 0) swap(C.s[0], C.e[0]);
		C.s[1] = p1; C.e[1] = Flip(p2, T);
		if(ccw(p2, C.s[1], C.e[1]) < 0) swap(C.s[1], C.e[1]);
		rd[S].push_back(C);
	}
	for(auto &T : drg[M]) {
		data C; C.i = I;
		C.s[0] = T; C.e[0] = Flip(p1, T);
		if(ccw(p1, C.s[0], p2) > 0) swap(C.s[0], C.e[0]);
		C.s[1] = T; C.e[1] = Flip(p2, T);
		if(ccw(p2, C.s[1], p1) > 0) swap(C.s[1], C.e[1]);
		rd[S].push_back(C);
	}
}

int main()
{
	scanf("%lld%lld",&n,&m);
	for(ll i=1;i<=n;i++) {
		ll A, B, C;
		scanf("%lld%lld%lld",&A,&B,&C);
		drg[C].push_back(pll(A, B));
	}
	scanf("%lld%lld%lld%lld%lld",&p1.X,&p1.Y,&p2.X,&p2.Y,&q);
	for(ll i=1;i<=q;i++) {
		ll A, B;
		scanf("%lld%lld",&A, &B);
		qry[i] = pll(A, B);
		if(!mem[qry[i]]) {
			mem[qry[i]] = 1;
			if(drg[A].size() < drg[B].size()) sadi(A, B, i);
			else majo(A, B, i);
		}
	}
	for(ll i=1;i<=m;i++) {
		cpr(p1, drg[i], rd[i], 0, z1, s1);
		cpr(p2, drg[i], rd[i], 1, z2, s2);
		for(ll j=0;j<=s1;j++) swp[j].clear();
		for(auto &T : rd[i]) {
			add(T.s[0].X, T.e[0].X, T.s[1].X, T.e[1].X, T.i);
		}
		seg.init(); pt.clear();
		for(ll j=0;j<drg[i].size();j++) {
			pt.push_back(pll(z1[j], z2[j]));
		}
		sort(pt.begin(), pt.end());
		for(ll j=1,k=0;j<=s1;j++) {
			while(k < pt.size() && pt[k].X <= j) {
				seg.upd(pt[k].Y, 1); k++;
			}
			for(auto &T : swp[j]) {
				ans[T.i] += seg.get(T.s, T.e) * T.x;
			}
		}
	}
	for(ll i=1;i<=q;i++) {
		mem[qry[i]] += ans[i];
		printf("%lld\n", mem[qry[i]]-1);
	}
}

Compilation message

dragon2.cpp: In function 'int main()':
dragon2.cpp:152:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(ll j=0;j<drg[i].size();j++) {
               ^
dragon2.cpp:157:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    while(k < pt.size() && pt[k].X <= j) {
            ^
dragon2.cpp:127:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld%lld",&n,&m);
                         ^
dragon2.cpp:130:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld%lld%lld",&A,&B,&C);
                                 ^
dragon2.cpp:133:58: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld%lld%lld%lld%lld",&p1.X,&p1.Y,&p2.X,&p2.Y,&q);
                                                          ^
dragon2.cpp:136:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld%lld",&A, &B);
                           ^

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 50412 KB Output is correct
2 Correct 69 ms 53476 KB Output is correct
3 Correct 399 ms 84148 KB Output is correct
4 Correct 779 ms 94992 KB Output is correct
5 Correct 353 ms 64496 KB Output is correct
6 Correct 9 ms 49584 KB Output is correct
7 Correct 6 ms 49584 KB Output is correct
8 Correct 13 ms 49840 KB Output is correct
9 Correct 19 ms 50276 KB Output is correct
10 Correct 19 ms 50156 KB Output is correct

Subtask #2
45.0 / 45.0

# 결과 실행 시간 메모리 Grader output
1 Correct 133 ms 60932 KB Output is correct
2 Correct 623 ms 102724 KB Output is correct
3 Correct 113 ms 57484 KB Output is correct
4 Correct 43 ms 50508 KB Output is correct
5 Correct 29 ms 49980 KB Output is correct
6 Correct 136 ms 59892 KB Output is correct
7 Correct 129 ms 60128 KB Output is correct
8 Correct 103 ms 54784 KB Output is correct
9 Correct 89 ms 59220 KB Output is correct
10 Correct 96 ms 58708 KB Output is correct

Subtask #3
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 50412 KB Output is correct
2 Correct 69 ms 53476 KB Output is correct
3 Correct 399 ms 84148 KB Output is correct
4 Correct 779 ms 94992 KB Output is correct
5 Correct 353 ms 64496 KB Output is correct
6 Correct 9 ms 49584 KB Output is correct
7 Correct 6 ms 49584 KB Output is correct
8 Correct 13 ms 49840 KB Output is correct
9 Correct 19 ms 50276 KB Output is correct
10 Correct 19 ms 50156 KB Output is correct
11 Correct 133 ms 60932 KB Output is correct
12 Correct 623 ms 102724 KB Output is correct
13 Correct 113 ms 57484 KB Output is correct
14 Correct 43 ms 50508 KB Output is correct
15 Correct 29 ms 49980 KB Output is correct
16 Correct 136 ms 59892 KB Output is correct
17 Correct 129 ms 60128 KB Output is correct
18 Correct 103 ms 54784 KB Output is correct
19 Correct 89 ms 59220 KB Output is correct
20 Correct 96 ms 58708 KB Output is correct
21 Correct 133 ms 60940 KB Output is correct
22 Correct 666 ms 99792 KB Output is correct
23 Memory limit exceeded 123 ms 262144 KB Memory limit exceeded
24 Halted 0 ms 0 KB -