답안 #29838 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
29838	2017-07-21T08:17:52 Z	cdemirer	007 (CEOI14_007)	C++14	0 / 100	896 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 = Dparents[SV1];
	while (x != -1) {
		//if (x) cerr << x << endl;
		int fark = Ddists[x] - Zdists[x];
		best1 = max(best1, fark);
		x = Dparents[x];
	}
	x = Dparents[SV2];
	while (x != -1) {
		int fark = Ddists[x] - Zdists[x];
		best2 = max(best2, fark);
		x = Dparents[x];
	}
	int svbest = min(Ddists[SV1] - Zdists[SV1], Ddists[SV2] - Zdists[SV2]);
	int ans = -1;
	ans = max(ans, max(svbest, min(best1, best2)));
	//if (Dparents[SV1] == SV2) best1 = max(best1, Ddists[SV1] - Zdists[SV1] - 2);
	//if (Dparents[SV2] == SV1) best2 = max(best2, Ddists[SV2] - Zdists[SV2] - 2);
	//int ans = min(best1, best2);
	printf("%d\n", (ans!=-1?ans:-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	Correct	4500 KB	Output is 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	126 ms	8492 KB	Output is correct
2	Incorrect	173 ms	10380 KB	Output isn't correct
3	Correct	139 ms	8808 KB	Output is correct
4	Incorrect	169 ms	10564 KB	Output isn't correct
5	Correct	109 ms	8312 KB	Output is correct
6	Correct	143 ms	8984 KB	Output is correct
7	Correct	143 ms	9348 KB	Output is correct
8	Correct	153 ms	9348 KB	Output is correct
9	Incorrect	156 ms	9900 KB	Output isn't correct
10	Correct	386 ms	14780 KB	Output is correct
11	Incorrect	339 ms	13620 KB	Output isn't correct
12	Correct	493 ms	15860 KB	Output is correct
13	Incorrect	379 ms	14308 KB	Output isn't correct
14	Correct	259 ms	12768 KB	Output is correct
15	Correct	426 ms	16192 KB	Output is correct
16	Correct	486 ms	16736 KB	Output is correct
17	Correct	413 ms	15508 KB	Output is correct
18	Incorrect	459 ms	15508 KB	Output isn't correct
19	Correct	396 ms	16740 KB	Output is correct
20	Incorrect	523 ms	19736 KB	Output isn't correct
21	Incorrect	436 ms	20680 KB	Output isn't correct
22	Correct	376 ms	18444 KB	Output is correct
23	Correct	686 ms	20488 KB	Output is correct
24	Correct	513 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	723 ms	20664 KB	Output is correct
28	Correct	539 ms	20668 KB	Output is correct
29	Correct	649 ms	19916 KB	Output is correct
30	Incorrect	719 ms	21412 KB	Output isn't correct
31	Incorrect	736 ms	23084 KB	Output isn't correct
32	Correct	676 ms	20480 KB	Output is correct
33	Correct	649 ms	21024 KB	Output is correct
34	Incorrect	706 ms	21852 KB	Output isn't correct
35	Incorrect	703 ms	21188 KB	Output isn't correct
36	Incorrect	616 ms	21864 KB	Output isn't correct
37	Correct	733 ms	24112 KB	Output is correct
38	Correct	856 ms	23744 KB	Output is correct
39	Correct	896 ms	23748 KB	Output is correct
40	Incorrect	619 ms	24720 KB	Output isn't correct
41	Correct	816 ms	26580 KB	Output is correct

답안 #29838

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