| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 29993 |
2017-07-21T11:47:07 Z |
cdemirer |
007 (CEOI14_007) |
C++14 |
|
1000 ms |
27752 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], Zparents[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;
else Zparents[edges[x.second][i]] = x.second;
S.insert(mp(dists[edges[x.second][i]], edges[x.second][i]));
}
}
}
}
bool flag[200000] = {0};
bool flag2[200000] = {0};
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);
Zparents[Z] = -1;
dijsktra(Zdists, Z);
int best1 = -1;
int best2 = -1;
int x = Dparents[SV1];
flag[SV1] = flag[SV2] = true;
while (x != -1) {
//if (x) cerr << x << endl;
int fark = Ddists[x] - Zdists[x];
best1 = max(best1, fark);
x = Dparents[x];
flag[x] = true;
}
x = Dparents[SV2];
int cntD = 1;
while (x != -1) {
if (flag[x] != true) cntD++;
int fark = Ddists[x] - Zdists[x];
best2 = max(best2, fark);
x = Dparents[x];
}
x = Zparents[SV1];
int cntZ = 1;
while (x != -1) {
flag2[x] = true;
x = Zparents[x];
}
x = Zparents[SV2];
while (x != -1) {
if (flag2[x] != true) cntZ++;
x = Zparents[x];
}
int sv1 = Ddists[SV1] - Zdists[SV1];
int sv2 = Ddists[SV2] - Zdists[SV2];
int minsv = min(sv1, sv2);
int ans = -1;
ans = max(ans, min(best1, best2));
ans = max(ans, minsv);
//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);
//if (Dparents[SV1] != SV2 && Dparents[SV2] != SV1 && min(best1, best2) != ans) ans = (ans!=-1?ans-1:-1);
if (/*ans != min(best1, best2) && */Dparents[SV1] != SV2 && Dparents[SV2] != SV1 && cntD < cntZ) ans--;
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:53:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d", &N, &M);
^
007.cpp:54:39: 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:58:34: 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 |
Partially correct |
0 ms |
5540 KB |
Partially correct |
| 2 |
Correct |
0 ms |
5540 KB |
Output is correct |
| 3 |
Correct |
0 ms |
5540 KB |
Output is correct |
| 4 |
Correct |
0 ms |
5540 KB |
Output is correct |
| 5 |
Correct |
0 ms |
5540 KB |
Output is correct |
| 6 |
Correct |
0 ms |
5540 KB |
Output is correct |
| 7 |
Correct |
0 ms |
5540 KB |
Output is correct |
| 8 |
Correct |
0 ms |
5540 KB |
Output is correct |
| 9 |
Correct |
0 ms |
5540 KB |
Output is correct |
| 10 |
Correct |
0 ms |
5540 KB |
Output is correct |
| 11 |
Correct |
0 ms |
5540 KB |
Output is correct |
| 12 |
Incorrect |
0 ms |
5540 KB |
Output isn't correct |
| 13 |
Correct |
0 ms |
5672 KB |
Output is correct |
| 14 |
Correct |
0 ms |
5540 KB |
Output is correct |
| 15 |
Correct |
0 ms |
5540 KB |
Output is correct |
| 16 |
Correct |
0 ms |
5540 KB |
Output is correct |
| 17 |
Correct |
0 ms |
5672 KB |
Output is correct |
| 18 |
Incorrect |
0 ms |
5672 KB |
Output isn't correct |
| 19 |
Correct |
0 ms |
5672 KB |
Output is correct |
| 20 |
Correct |
0 ms |
5672 KB |
Output is correct |
| 21 |
Correct |
0 ms |
5672 KB |
Output is correct |
| 22 |
Correct |
0 ms |
5672 KB |
Output is correct |
| 23 |
Correct |
0 ms |
5672 KB |
Output is correct |
| 24 |
Correct |
0 ms |
5672 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
109 ms |
9664 KB |
Output is correct |
| 2 |
Correct |
209 ms |
11552 KB |
Output is correct |
| 3 |
Partially correct |
136 ms |
9980 KB |
Partially correct |
| 4 |
Correct |
196 ms |
11736 KB |
Output is correct |
| 5 |
Correct |
116 ms |
9484 KB |
Output is correct |
| 6 |
Correct |
119 ms |
10156 KB |
Output is correct |
| 7 |
Correct |
156 ms |
10520 KB |
Output is correct |
| 8 |
Correct |
153 ms |
10520 KB |
Output is correct |
| 9 |
Correct |
153 ms |
11072 KB |
Output is correct |
| 10 |
Correct |
376 ms |
15952 KB |
Output is correct |
| 11 |
Correct |
256 ms |
14792 KB |
Output is correct |
| 12 |
Correct |
463 ms |
17032 KB |
Output is correct |
| 13 |
Correct |
363 ms |
15480 KB |
Output is correct |
| 14 |
Correct |
313 ms |
13940 KB |
Output is correct |
| 15 |
Correct |
443 ms |
17364 KB |
Output is correct |
| 16 |
Correct |
503 ms |
17908 KB |
Output is correct |
| 17 |
Correct |
426 ms |
16680 KB |
Output is correct |
| 18 |
Correct |
449 ms |
16680 KB |
Output is correct |
| 19 |
Correct |
499 ms |
17912 KB |
Output is correct |
| 20 |
Correct |
636 ms |
20908 KB |
Output is correct |
| 21 |
Incorrect |
503 ms |
21852 KB |
Output isn't correct |
| 22 |
Partially correct |
483 ms |
19616 KB |
Partially correct |
| 23 |
Correct |
659 ms |
21660 KB |
Output is correct |
| 24 |
Partially correct |
666 ms |
21496 KB |
Partially correct |
| 25 |
Incorrect |
663 ms |
20636 KB |
Output isn't correct |
| 26 |
Correct |
636 ms |
19800 KB |
Output is correct |
| 27 |
Correct |
566 ms |
21836 KB |
Output is correct |
| 28 |
Correct |
773 ms |
21840 KB |
Output is correct |
| 29 |
Correct |
626 ms |
21088 KB |
Output is correct |
| 30 |
Correct |
699 ms |
22584 KB |
Output is correct |
| 31 |
Incorrect |
553 ms |
24256 KB |
Output isn't correct |
| 32 |
Correct |
733 ms |
21652 KB |
Output is correct |
| 33 |
Correct |
733 ms |
22196 KB |
Output is correct |
| 34 |
Incorrect |
816 ms |
23024 KB |
Output isn't correct |
| 35 |
Correct |
556 ms |
22360 KB |
Output is correct |
| 36 |
Correct |
699 ms |
23036 KB |
Output is correct |
| 37 |
Correct |
936 ms |
25284 KB |
Output is correct |
| 38 |
Correct |
929 ms |
24916 KB |
Output is correct |
| 39 |
Correct |
909 ms |
24920 KB |
Output is correct |
| 40 |
Correct |
886 ms |
25892 KB |
Output is correct |
| 41 |
Execution timed out |
1000 ms |
27752 KB |
Execution timed out |
