Submission #29896

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
29896	2017-07-21T10:12:57 Z	rondojim	007 (CEOI14_007)	C++14	23 / 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];
	}
	int ans = min(best1, best2);
	if (Dparents[SV1] == SV2) ans = best2;
	if (Dparents[SV2] == SV1) ans = best1;
	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
9.0 / 30.0

#	Verdict	Memory	Grader output
1	Partially correct	4368 KB	Partially correct
2	Partially correct	4368 KB	Partially correct
3	Partially correct	4368 KB	Partially correct
4	Correct	4368 KB	Output is correct
5	Correct	4368 KB	Output is correct
6	Partially correct	4368 KB	Partially correct
7	Partially correct	4368 KB	Partially correct
8	Correct	4368 KB	Output is correct
9	Partially correct	4368 KB	Partially correct
10	Partially correct	4368 KB	Partially correct
11	Partially correct	4368 KB	Partially correct
12	Correct	4368 KB	Output is correct
13	Partially correct	4500 KB	Partially correct
14	Correct	4368 KB	Output is correct
15	Partially correct	4368 KB	Partially correct
16	Correct	4368 KB	Output is correct
17	Correct	4500 KB	Output is correct
18	Correct	4500 KB	Output is correct
19	Partially correct	4500 KB	Partially correct
20	Partially correct	4500 KB	Partially correct
21	Partially correct	4500 KB	Partially correct
22	Partially correct	4500 KB	Partially correct
23	Partially correct	4500 KB	Partially correct
24	Correct	4500 KB	Output is correct

Subtask #2
14.0 / 70.0

#	Verdict	Execution time	Memory	Grader output
1	Partially correct	126 ms	8492 KB	Partially correct
2	Correct	183 ms	10380 KB	Output is correct
3	Partially correct	126 ms	8808 KB	Partially correct
4	Correct	136 ms	10564 KB	Output is correct
5	Partially correct	126 ms	8312 KB	Partially correct
6	Partially correct	133 ms	8984 KB	Partially correct
7	Partially correct	179 ms	9348 KB	Partially correct
8	Partially correct	199 ms	9348 KB	Partially correct
9	Correct	203 ms	9900 KB	Output is correct
10	Partially correct	439 ms	14780 KB	Partially correct
11	Correct	389 ms	13620 KB	Output is correct
12	Partially correct	606 ms	15860 KB	Partially correct
13	Correct	406 ms	14308 KB	Output is correct
14	Correct	329 ms	12768 KB	Output is correct
15	Partially correct	483 ms	16192 KB	Partially correct
16	Partially correct	549 ms	16736 KB	Partially correct
17	Partially correct	329 ms	15508 KB	Partially correct
18	Correct	503 ms	15508 KB	Output is correct
19	Partially correct	373 ms	16740 KB	Partially correct
20	Correct	609 ms	19736 KB	Output is correct
21	Correct	746 ms	20680 KB	Output is correct
22	Partially correct	576 ms	18444 KB	Partially correct
23	Partially correct	639 ms	20488 KB	Partially correct
24	Partially correct	589 ms	20324 KB	Partially correct
25	Correct	486 ms	19464 KB	Output is correct
26	Partially correct	459 ms	18628 KB	Partially correct
27	Partially correct	509 ms	20664 KB	Partially correct
28	Partially correct	563 ms	20668 KB	Partially correct
29	Partially correct	656 ms	19916 KB	Partially correct
30	Correct	836 ms	21412 KB	Output is correct
31	Correct	839 ms	23084 KB	Output is correct
32	Partially correct	653 ms	20480 KB	Partially correct
33	Partially correct	619 ms	21024 KB	Partially correct
34	Correct	703 ms	21852 KB	Output is correct
35	Correct	749 ms	21188 KB	Output is correct
36	Correct	769 ms	21864 KB	Output is correct
37	Execution timed out	1000 ms	24112 KB	Execution timed out
38	Execution timed out	1000 ms	23744 KB	Execution timed out
39	Partially correct	779 ms	23748 KB	Partially correct
40	Correct	829 ms	24720 KB	Output is correct
41	Execution timed out	1000 ms	26580 KB	Execution timed out

Submission #29896

Compilation message

Subtask #1 9.0 / 30.0

Subtask #2 14.0 / 70.0

Subtask #1
9.0 / 30.0

Subtask #2
14.0 / 70.0