| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 29838 |
2017-07-21T08:17:52 Z |
cdemirer |
007 (CEOI14_007) |
C++14 |
|
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);
^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
4368 KB |
Output is correct |
| 2 |
Correct |
0 ms |
4368 KB |
Output is correct |
| 3 |
Correct |
0 ms |
4368 KB |
Output is correct |
| 4 |
Incorrect |
0 ms |
4368 KB |
Output isn't correct |
| 5 |
Incorrect |
0 ms |
4368 KB |
Output isn't correct |
| 6 |
Correct |
0 ms |
4368 KB |
Output is correct |
| 7 |
Correct |
0 ms |
4368 KB |
Output is correct |
| 8 |
Incorrect |
0 ms |
4368 KB |
Output isn't correct |
| 9 |
Correct |
0 ms |
4368 KB |
Output is correct |
| 10 |
Correct |
0 ms |
4368 KB |
Output is correct |
| 11 |
Correct |
0 ms |
4368 KB |
Output is correct |
| 12 |
Incorrect |
0 ms |
4368 KB |
Output isn't correct |
| 13 |
Correct |
0 ms |
4500 KB |
Output is correct |
| 14 |
Incorrect |
0 ms |
4368 KB |
Output isn't correct |
| 15 |
Correct |
0 ms |
4368 KB |
Output is correct |
| 16 |
Incorrect |
0 ms |
4368 KB |
Output isn't correct |
| 17 |
Incorrect |
0 ms |
4500 KB |
Output isn't correct |
| 18 |
Incorrect |
0 ms |
4500 KB |
Output isn't correct |
| 19 |
Correct |
0 ms |
4500 KB |
Output is correct |
| 20 |
Correct |
0 ms |
4500 KB |
Output is correct |
| 21 |
Correct |
0 ms |
4500 KB |
Output is correct |
| 22 |
Correct |
0 ms |
4500 KB |
Output is correct |
| 23 |
Correct |
0 ms |
4500 KB |
Output is correct |
| 24 |
Incorrect |
0 ms |
4500 KB |
Output isn't correct |
| # |
Verdict |
Execution time |
Memory |
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 |
