oj.uz

답안 #129689

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
129689 2019-07-13T04:48:30 Z 김세빈(#3138) 물병 (JOI14_bottle) C++14
30 / 100
 5000 ms 41340 KB 
#include <bits/stdc++.h>

using namespace std;

struct edge{
	int u, v, c;
	edge() {}
	edge(int u, int v, int c) : u(u), v(v), c(c) {}
};

char B[2020][2020];
queue <int> Q;
vector <edge> K;
vector <int> V[202020];
int C[4040404], D[4040404], P[202020];
int X[202020], Y[202020], S[202020], E[202020];
int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};
int n, m, k, q;

int find(int p) { return p == P[p]? p : P[p] = find(P[p]); }
void unite(int p, int q) { P[find(p)] = find(q); }

int main()
{
	int i, x, y, p, t, f;
	
	scanf("%d%d%d%d", &n, &m, &k, &q);
	
	for(i=0; i<n; i++){
		scanf("%s", B[i]);
	}
	
	for(i=1; i<=k; i++){
		scanf("%d%d", &x, &y);
		x --; y --; t = x * m + y;
		Q.push(t); C[t] = i; D[t] = 0;
		P[i] = i;
	}
	
	for(; !Q.empty(); ){
		p = Q.front(); Q.pop();
		x = p / m; y = p % m;
		for(i=0; i<4; i++){
			x += dx[i]; y += dy[i];
			if(0 <= x && x < n && 0 <= y && y < m && B[x][y] == '.'){
				t = x * m + y;
				if(!C[t]) Q.push(t), C[t] = C[p], D[t] = D[p] + 1;
				else if(find(C[t]) != find(C[p])){
					unite(C[t], C[p]);
					K.emplace_back(C[p], C[t], D[t] + D[p]);
				}
			}
			x -= dx[i]; y -= dy[i];
		}
	}
	
	sort(K.begin(), K.end(), [&](edge &ea, edge &eb){
		return ea.c < eb.c;
	});
	
	for(i=1; i<=q; i++){
		scanf("%d%d", X + i, Y + i);
//		S[i] = 0; E[i] = K.size() - 1;
		int j;
		for(j=1; j<=k; j++) P[j] = j;
		for(j=0; j<K.size(); j++){
			unite(K[j].u, K[j].v);
			if(find(X[i]) == find(Y[i])) break;
		}
		if(j < K.size()) printf("%d\n", K[j].c);
		else printf("-1\n");
	}
/*	
	for(; ; ){
		for(i=1; i<=k; i++){
			P[i] = i;
		}
		
		for(i=0; i<K.size(); i++){
			V[i].clear();
		}
		
		for(i=1, f=0; i<=q; i++){
			if(S[i] <= E[i]){
				V[S[i] + E[i] >> 1].push_back(i);
				f = 1;
			}
		}
		
		if(!f) break;
		
		for(i=0; i<K.size(); i++){
			unite(K[i].u, K[i].v);
			for(int &t: V[i]){
				if(find(X[t]) == find(Y[t])){
					E[t] = (S[t] + E[t] >> 1) - 1;
				}
				else S[t] = (S[t] + E[t] >> 1) + 1;
			}
		}
	}
	
	for(i=1; i<=q; i++){
		if(E[i] + 1 < K.size()) printf("%d\n", K[E[i] + 1].c);
		else printf("-1\n");
	}
*/	
	return 0;
}

Compilation message

bottle.cpp: In function 'int main()':
bottle.cpp:66:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(j=0; j<K.size(); j++){
            ~^~~~~~~~~
bottle.cpp:70:8: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(j < K.size()) printf("%d\n", K[j].c);
      ~~^~~~~~~~~~
bottle.cpp:25:21: warning: unused variable 'f' [-Wunused-variable]
  int i, x, y, p, t, f;
                     ^
bottle.cpp:27:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d%d", &n, &m, &k, &q);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
bottle.cpp:30:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s", B[i]);
   ~~~~~^~~~~~~~~~~~
bottle.cpp:34:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &x, &y);
   ~~~~~^~~~~~~~~~~~~~~~
bottle.cpp:62:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", X + i, Y + i);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 14 ms 5368 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 10744 KB Output is correct
2 Correct 43 ms 8952 KB Output is correct
3 Correct 400 ms 40692 KB Output is correct
4 Correct 604 ms 40740 KB Output is correct
5 Correct 668 ms 41172 KB Output is correct
6 Correct 385 ms 40568 KB Output is correct
7 Correct 623 ms 40824 KB Output is correct
8 Correct 664 ms 41052 KB Output is correct
9 Correct 768 ms 41340 KB Output is correct
10 Correct 405 ms 40568 KB Output is correct
11 Correct 562 ms 40732 KB Output is correct
12 Correct 164 ms 34008 KB Output is correct
13 Correct 217 ms 33840 KB Output is correct
14 Correct 155 ms 34004 KB Output is correct
15 Correct 212 ms 33784 KB Output is correct

Subtask #3
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 51 ms 10764 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 5005 ms 41240 KB Time limit exceeded
2 Halted 0 ms 0 KB -