답안 #29821 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
29821	2017-07-21T07:55:39 Z	cdemirer	007 (CEOI14_007)	C++14	0 / 100	926 ms	26580 KB

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> llp;
typedef pair<int, int> ii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<vi> vvi;
typedef vector<vii> vvii;
#define mp(x, y) make_pair(x, y)
#define pb(x) push_back(x)

int N, M;
int Z, D, SV1, SV2;
vvi edges;
int Ddists[200000], Zdists[200000];
int Dparents[200000];

void dijsktra(int *dists, int s) {
	set<ii> S;
	for (int i = 0; i < N; i++) {
		if (i == s) {
			dists[i] = 0;
			S.insert(mp(dists[i], i));
			continue;
		}
		dists[i] = (int)1e9;
		S.insert(mp(dists[i], i));
	}
	while ( ! S.empty() ) {
		ii x = *S.begin();
		S.erase(S.begin());
		for (int i = 0; i < edges[x.second].size(); i++) {
			if (dists[x.second] + 1 < dists[edges[x.second][i]]) {
				S.erase(mp(dists[edges[x.second][i]], edges[x.second][i]));
				dists[edges[x.second][i]] = dists[x.second] + 1;
				if (s == D) Dparents[edges[x.second][i]] = x.second;
				S.insert(mp(dists[edges[x.second][i]], edges[x.second][i]));
			}
		}
	}
}

int main(int argc, char **argv) {

	//freopen("input", "r", stdin);
	//freopen("output", "w", stdout);

	scanf("%d%d", &N, &M);
	scanf("%d%d%d%d", &Z, &D, &SV1, &SV2);
	Z--; D--; SV1--; SV2--;
	edges.resize(N);
	for (int i = 0; i < M; i++) {
		int a, b; scanf("%d%d", &a, &b);
		a--, b--;
		edges[a].pb(b);
		edges[b].pb(a);
	}
	Dparents[D] = -1;
	dijsktra(Ddists, D);
	dijsktra(Zdists, Z);

	int best1 = -1;
	int best2 = -1;
	int x = SV1;
	while (x != -1) {
		//if (x) cerr << x << endl;
		int fark = Ddists[x] - Zdists[x];
		best1 = max(best1, fark);
		x = Dparents[x];
	}
	x = SV2;
	while (x != -1) {
		int fark = Ddists[x] - Zdists[x];
		best2 = max(best2, fark);
		x = Dparents[x];
	}
	best2 = max(best2, Ddists[SV1] - Zdists[SV1] + 1);
	best1 = max(best1, Ddists[SV2] - Zdists[SV2] + 1);
	int ans = min(best1, best2);
	printf("%d\n", (ans!=-1?ans-1:-1));

	return 0;
}

Compilation message

007.cpp: In function 'void dijsktra(int*, int)':
007.cpp:33:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 0; i < edges[x.second].size(); i++) {
                     ^
007.cpp: In function 'int main(int, char**)':
007.cpp:49:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &N, &M);
                       ^
007.cpp:50:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d%d", &Z, &D, &SV1, &SV2);
                                       ^
007.cpp:54:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int a, b; scanf("%d%d", &a, &b);
                                  ^

Subtask #1
0.0 / 30.0

#	결과	메모리	Grader output
1	Correct	4368 KB	Output is correct
2	Correct	4368 KB	Output is correct
3	Correct	4368 KB	Output is correct
4	Incorrect	4368 KB	Output isn't correct
5	Incorrect	4368 KB	Output isn't correct
6	Correct	4368 KB	Output is correct
7	Correct	4368 KB	Output is correct
8	Incorrect	4368 KB	Output isn't correct
9	Correct	4368 KB	Output is correct
10	Correct	4368 KB	Output is correct
11	Correct	4368 KB	Output is correct
12	Incorrect	4368 KB	Output isn't correct
13	Correct	4500 KB	Output is correct
14	Incorrect	4368 KB	Output isn't correct
15	Correct	4368 KB	Output is correct
16	Incorrect	4368 KB	Output isn't correct
17	Incorrect	4500 KB	Output isn't correct
18	Incorrect	4500 KB	Output isn't correct
19	Correct	4500 KB	Output is correct
20	Correct	4500 KB	Output is correct
21	Incorrect	4500 KB	Output isn't correct
22	Correct	4500 KB	Output is correct
23	Correct	4500 KB	Output is correct
24	Incorrect	4500 KB	Output isn't correct

Subtask #2
0.0 / 70.0

#	결과	실행 시간	메모리	Grader output
1	Correct	113 ms	8492 KB	Output is correct
2	Incorrect	173 ms	10380 KB	Output isn't correct
3	Correct	123 ms	8808 KB	Output is correct
4	Incorrect	179 ms	10564 KB	Output isn't correct
5	Incorrect	99 ms	8312 KB	Output isn't correct
6	Incorrect	119 ms	8984 KB	Output isn't correct
7	Correct	156 ms	9348 KB	Output is correct
8	Correct	146 ms	9348 KB	Output is correct
9	Incorrect	153 ms	9900 KB	Output isn't correct
10	Correct	376 ms	14780 KB	Output is correct
11	Incorrect	316 ms	13620 KB	Output isn't correct
12	Correct	323 ms	15860 KB	Output is correct
13	Incorrect	363 ms	14308 KB	Output isn't correct
14	Correct	276 ms	12768 KB	Output is correct
15	Correct	466 ms	16192 KB	Output is correct
16	Incorrect	449 ms	16736 KB	Output isn't correct
17	Correct	299 ms	15508 KB	Output is correct
18	Incorrect	303 ms	15508 KB	Output isn't correct
19	Correct	346 ms	16740 KB	Output is correct
20	Incorrect	439 ms	19736 KB	Output isn't correct
21	Incorrect	463 ms	20680 KB	Output isn't correct
22	Correct	396 ms	18444 KB	Output is correct
23	Correct	433 ms	20488 KB	Output is correct
24	Correct	576 ms	20324 KB	Output is correct
25	Incorrect	606 ms	19464 KB	Output isn't correct
26	Correct	576 ms	18628 KB	Output is correct
27	Correct	703 ms	20664 KB	Output is correct
28	Correct	743 ms	20668 KB	Output is correct
29	Correct	506 ms	19916 KB	Output is correct
30	Incorrect	539 ms	21412 KB	Output isn't correct
31	Incorrect	749 ms	23084 KB	Output isn't correct
32	Correct	703 ms	20480 KB	Output is correct
33	Correct	676 ms	21024 KB	Output is correct
34	Incorrect	793 ms	21852 KB	Output isn't correct
35	Incorrect	716 ms	21188 KB	Output isn't correct
36	Incorrect	656 ms	21864 KB	Output isn't correct
37	Incorrect	919 ms	24112 KB	Output isn't correct
38	Correct	833 ms	23744 KB	Output is correct
39	Correct	849 ms	23748 KB	Output is correct
40	Incorrect	926 ms	24720 KB	Output isn't correct
41	Correct	849 ms	26580 KB	Output is correct

답안 #29821

Compilation message

Subtask #1 0.0 / 30.0

Subtask #2 0.0 / 70.0

Subtask #1
0.0 / 30.0

Subtask #2
0.0 / 70.0