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Submission #429674

# Submission time Handle Problem Language Result Execution time Memory
429674 2021-06-16T08:37:30 Z 송준혁(#7525) Power plants (CPSPC17_power) C++17
35 / 100
 6000 ms 125676 KB 
#include <bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
#define lb lower_bound
#define MOD 1000000007
#define HASH 2979659
#define INF (1ll<<61)
using namespace std;
typedef long long LL;
typedef pair<int,int> pii;
typedef pair<LL,int> pli;

int N, M, Q, num;
int chk[101010];
pii B[101010];
LL ans, X[101010], Y[101010];
vector<int> V[101010], ansX, ansY;
vector<pli> H[3030303];

int bid(LL x, LL k){
	int lo=0, hi=MOD, ret=0;
	while (lo<=hi){
		LL m=lo+hi>>1;
		if (m*m <= 2*x*x/k) ret=m, lo=m+1;
		else hi=m-1;
	}
	return ret;
}

inline int Hash(int x, int y){return (((LL)(x+5)*MOD + (y+5)) ^ 19059) % HASH;}

int id(int x, int y){
	int t = Hash(x, y);
	for (pli it : H[t]) if (it.fi == (LL)x*MOD+y) return it.se;
	return -1;
}

bool dfs(int u, int c, LL k){
	if (chk[u]) return chk[u]*c < 0;
	chk[u] = c;
	for (register int dx=-2; dx<=2; dx++) for (register int dy=-2; dy<=2; dy++){
		if (dx*dy == 4 || dx*dy == -4) continue;
		int t = id(B[u].fi+dx, B[u].se+dy);
		if (t < 0) continue;
		for (int v : V[t]) if (v != u && (X[u]-X[v])*(X[u]-X[v])+(Y[u]-Y[v])*(Y[u]-Y[v]) <= k){
			if (dfs(v, -c, k)) return true;
		}
	}
	return false;
}

bool f(LL k){
	for (int i=0; i<num; i++) V[i].clear();
	for (int i=1; i<=N; i++) H[Hash(B[i].fi, B[i].se)].clear();
	for (int i=1; i<=N; i++) chk[i] = 0;
	num = 0;
	for (int i=1; i<=N; i++){
		B[i].fi = bid(X[i], k);
		B[i].se = bid(Y[i], k);
		if (id(B[i].fi, B[i].se) < 0){
			H[Hash(B[i].fi, B[i].se)].pb(pli((LL)MOD*B[i].fi + B[i].se, num));
			num++;
		}
	}
	for (int i=1; i<=N; i++){
		int t = id(B[i].fi, B[i].se);
		V[t].pb(i);
		if (V[t].size() > 2) return false;
	}
	for (int i=1; i<=N; i++){
		if (chk[i]) continue;
		if (dfs(i, 1, k)) return false;
	}
	return true;
}

int main(){
	scanf("%d", &N);
	for (int i=1; i<=N; i++) scanf("%lld %lld", &X[i], &Y[i]);
	LL lo=0, hi=INF;
	while (lo<=hi){
		LL m = lo+hi>>1;
		if (f(m)) ans = m, lo = m + 1;
		else hi = m - 1;
	}
	printf("%lld\n", ans+1);
	f(ans);
	for (int i=1; i<=N; i++){
		if (chk[i] > 0) ansX.pb(i);
		else ansY.pb(i);
	}
	printf("%d\n", ansX.size());
	for (int x : ansX) printf("%d ", x);
	printf("\n");
	printf("%d\n", ansY.size());
	for (int x : ansY) printf("%d ", x);
	printf("\n");
	return 0;
}

Compilation message

Main.cpp: In function 'int bid(LL, LL)':
Main.cpp:24:10: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   24 |   LL m=lo+hi>>1;
      |        ~~^~~
Main.cpp: In function 'bool dfs(int, int, LL)':
Main.cpp:42:20: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   42 |  for (register int dx=-2; dx<=2; dx++) for (register int dy=-2; dy<=2; dy++){
      |                    ^~
Main.cpp:42:58: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   42 |  for (register int dx=-2; dx<=2; dx++) for (register int dy=-2; dy<=2; dy++){
      |                                                          ^~
Main.cpp: In function 'int main()':
Main.cpp:83:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   83 |   LL m = lo+hi>>1;
      |          ~~^~~
Main.cpp:93:11: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wformat=]
   93 |  printf("%d\n", ansX.size());
      |          ~^     ~~~~~~~~~~~
      |           |              |
      |           int            std::vector<int>::size_type {aka long unsigned int}
      |          %ld
Main.cpp:96:11: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wformat=]
   96 |  printf("%d\n", ansY.size());
      |          ~^     ~~~~~~~~~~~
      |           |              |
      |           int            std::vector<int>::size_type {aka long unsigned int}
      |          %ld
Main.cpp:79:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   79 |  scanf("%d", &N);
      |  ~~~~~^~~~~~~~~~
Main.cpp:80:32: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   80 |  for (int i=1; i<=N; i++) scanf("%lld %lld", &X[i], &Y[i]);
      |                           ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 73796 KB Output is correct
2 Correct 52 ms 73820 KB Output is correct
3 Correct 52 ms 73856 KB Output is correct
4 Correct 50 ms 73848 KB Output is correct
5 Correct 55 ms 73848 KB Output is correct
6 Correct 47 ms 73844 KB Output is correct
7 Correct 44 ms 73804 KB Output is correct
8 Correct 44 ms 73876 KB Output is correct
9 Correct 44 ms 73856 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 73796 KB Output is correct
2 Correct 52 ms 73820 KB Output is correct
3 Correct 52 ms 73856 KB Output is correct
4 Correct 50 ms 73848 KB Output is correct
5 Correct 55 ms 73848 KB Output is correct
6 Correct 47 ms 73844 KB Output is correct
7 Correct 44 ms 73804 KB Output is correct
8 Correct 44 ms 73876 KB Output is correct
9 Correct 44 ms 73856 KB Output is correct
10 Correct 87 ms 74828 KB Output is correct
11 Correct 83 ms 74696 KB Output is correct
12 Correct 96 ms 74616 KB Output is correct
13 Correct 95 ms 74884 KB Output is correct
14 Correct 82 ms 74912 KB Output is correct
15 Correct 63 ms 74196 KB Output is correct
16 Correct 89 ms 74496 KB Output is correct
17 Correct 103 ms 74692 KB Output is correct
18 Correct 108 ms 74776 KB Output is correct

Subtask #3
0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 73796 KB Output is correct
2 Correct 52 ms 73820 KB Output is correct
3 Correct 52 ms 73856 KB Output is correct
4 Correct 50 ms 73848 KB Output is correct
5 Correct 55 ms 73848 KB Output is correct
6 Correct 47 ms 73844 KB Output is correct
7 Correct 44 ms 73804 KB Output is correct
8 Correct 44 ms 73876 KB Output is correct
9 Correct 44 ms 73856 KB Output is correct
10 Correct 87 ms 74828 KB Output is correct
11 Correct 83 ms 74696 KB Output is correct
12 Correct 96 ms 74616 KB Output is correct
13 Correct 95 ms 74884 KB Output is correct
14 Correct 82 ms 74912 KB Output is correct
15 Correct 63 ms 74196 KB Output is correct
16 Correct 89 ms 74496 KB Output is correct
17 Correct 103 ms 74692 KB Output is correct
18 Correct 108 ms 74776 KB Output is correct
19 Execution timed out 6088 ms 125676 KB Time limit exceeded
20 Halted 0 ms 0 KB -