Submission #29832

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
29832	2017-07-21T08:05:08 Z	cdemirer	007 (CEOI14_007)	C++14	0 / 100	1000 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];
	}
	/*if (Dparents[SV1] == SV2)*/ //best1 = max(best1, Ddists[SV1] - Zdists[SV1] + 1);
	/*if (Dparents[SV2] == SV1)*/ //best2 = max(best2, Ddists[SV2] - Zdists[SV2] + 1);
	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

#	Verdict	Memory	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

#	Verdict	Execution time	Memory	Grader output
1	Correct	126 ms	8492 KB	Output is correct
2	Incorrect	169 ms	10380 KB	Output isn't correct
3	Correct	153 ms	8808 KB	Output is correct
4	Incorrect	129 ms	10564 KB	Output isn't correct
5	Correct	83 ms	8312 KB	Output is correct
6	Correct	113 ms	8984 KB	Output is correct
7	Correct	116 ms	9348 KB	Output is correct
8	Correct	116 ms	9348 KB	Output is correct
9	Incorrect	169 ms	9900 KB	Output isn't correct
10	Correct	336 ms	14780 KB	Output is correct
11	Incorrect	256 ms	13620 KB	Output isn't correct
12	Correct	499 ms	15860 KB	Output is correct
13	Incorrect	359 ms	14308 KB	Output isn't correct
14	Correct	243 ms	12768 KB	Output is correct
15	Correct	446 ms	16192 KB	Output is correct
16	Correct	479 ms	16736 KB	Output is correct
17	Correct	423 ms	15508 KB	Output is correct
18	Incorrect	349 ms	15508 KB	Output isn't correct
19	Correct	389 ms	16740 KB	Output is correct
20	Incorrect	579 ms	19736 KB	Output isn't correct
21	Incorrect	463 ms	20680 KB	Output isn't correct
22	Correct	569 ms	18444 KB	Output is correct
23	Correct	686 ms	20488 KB	Output is correct
24	Correct	636 ms	20324 KB	Output is correct
25	Incorrect	563 ms	19464 KB	Output isn't correct
26	Correct	569 ms	18628 KB	Output is correct
27	Correct	663 ms	20664 KB	Output is correct
28	Correct	723 ms	20668 KB	Output is correct
29	Correct	673 ms	19916 KB	Output is correct
30	Incorrect	776 ms	21412 KB	Output isn't correct
31	Incorrect	816 ms	23084 KB	Output isn't correct
32	Correct	643 ms	20480 KB	Output is correct
33	Correct	739 ms	21024 KB	Output is correct
34	Incorrect	789 ms	21852 KB	Output isn't correct
35	Incorrect	663 ms	21188 KB	Output isn't correct
36	Incorrect	566 ms	21864 KB	Output isn't correct
37	Correct	913 ms	24112 KB	Output is correct
38	Correct	869 ms	23744 KB	Output is correct
39	Correct	906 ms	23748 KB	Output is correct
40	Incorrect	899 ms	24720 KB	Output isn't correct
41	Execution timed out	1000 ms	26580 KB	Execution timed out

Submission #29832

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