| Task: | Tunnels |
| Sender: | bciobanu |
| Submission time: | 2017-01-22 13:26:49 +0200 |
| Language: | C++ |
| Status: | READY |
| Result: | 0 |
| group | verdict | score |
|---|---|---|
| #1 | WRONG ANSWER | 0 |
| #2 | WRONG ANSWER | 0 |
| #3 | WRONG ANSWER | 0 |
| test | verdict | time | group | |
|---|---|---|---|---|
| #1 | WRONG ANSWER | 0.05 s | 1 | details |
| #2 | WRONG ANSWER | 0.04 s | 1 | details |
| #3 | WRONG ANSWER | 0.05 s | 1 | details |
| #4 | WRONG ANSWER | 0.04 s | 1 | details |
| #5 | WRONG ANSWER | 0.04 s | 1 | details |
| #6 | WRONG ANSWER | 0.05 s | 2 | details |
| #7 | WRONG ANSWER | 0.04 s | 2 | details |
| #8 | WRONG ANSWER | 0.03 s | 2 | details |
| #9 | WRONG ANSWER | 0.04 s | 2 | details |
| #10 | WRONG ANSWER | 0.06 s | 2 | details |
| #11 | WRONG ANSWER | 0.18 s | 3 | details |
| #12 | WRONG ANSWER | 0.09 s | 3 | details |
| #13 | WRONG ANSWER | 0.07 s | 3 | details |
| #14 | WRONG ANSWER | 0.07 s | 3 | details |
| #15 | WRONG ANSWER | 0.06 s | 3 | details |
Code
#include <bits/stdc++.h>
#define SZ(x) ((int) (x).size())
using namespace std;
typedef long long int64;
const int NMAX = 100000;
vector<int> G[NMAX];
int leftPair[NMAX], rightPair[NMAX];
bool used[NMAX];
bool pairUp(const int& node) {
if (used[node]) {
return false;
}
used[node] = true;
for (const int& to: G[node]) {
if (rightPair[to] == -1) {
leftPair[node] = to;
rightPair[to] = node;
return true;
}
}
for (const int& to: G[node]) {
if (pairUp(rightPair[to])) {
leftPair[node] = to;
rightPair[to] = node;
return true;
}
}
return false;
}
int main(void) {
cin.tie(0);
ios_base::sync_with_stdio(false);
int n, m; cin >> n >> m;
for (int i = 0; i < m; i++) {
int x, y; cin >> x >> y;
G[x - 1].push_back(y - 1);
}
memset(leftPair, -1, 4 * n);
memset(rightPair, -1, 4 * n);
bool pushed;
do {
memset(used, 0, n);
pushed = false;
for (int i = 0; i < n; i++) {
if (leftPair[i] == -1) {
pushed |= pairUp(i);
}
}
} while (pushed);
int matching = 0;
for (int i = 0; i < n; i++) {
matching += (leftPair[i] != -1);
}
cout << (m - matching) << '\n';
}Test details
Test 1
Group: 1
Verdict: WRONG ANSWER
| input |
|---|
| 10 20 4 5 6 4 5 1 5 9 ... |
| correct output |
|---|
| 11 |
| user output |
|---|
| 14 |
Test 2
Group: 1
Verdict: WRONG ANSWER
| input |
|---|
| 10 10 7 3 5 2 9 7 1 5 ... |
| correct output |
|---|
| 5 |
| user output |
|---|
| 4 |
Test 3
Group: 1
Verdict: WRONG ANSWER
| input |
|---|
| 10 5 5 7 3 8 5 8 3 7 ... |
| correct output |
|---|
| 4 |
| user output |
|---|
| 2 |
Test 4
Group: 1
Verdict: WRONG ANSWER
| input |
|---|
| 10 4 9 1 6 8 7 1 5 7 |
| correct output |
|---|
| 3 |
| user output |
|---|
| 1 |
Test 5
Group: 1
Verdict: WRONG ANSWER
| input |
|---|
| 10 2 10 6 2 1 |
| correct output |
|---|
| 2 |
| user output |
|---|
| 0 |
Test 6
Group: 2
Verdict: WRONG ANSWER
| input |
|---|
| 100 200 24 40 25 6 36 93 92 90 ... |
| correct output |
|---|
| 97 |
| user output |
|---|
| 136 |
Test 7
Group: 2
Verdict: WRONG ANSWER
| input |
|---|
| 100 100 98 37 91 37 60 92 46 27 ... |
| correct output |
|---|
| 60 |
| user output |
|---|
| 53 |
Test 8
Group: 2
Verdict: WRONG ANSWER
| input |
|---|
| 100 50 74 95 53 72 69 85 14 13 ... |
| correct output |
|---|
| 34 |
| user output |
|---|
| 20 |
Test 9
Group: 2
Verdict: WRONG ANSWER
| input |
|---|
| 100 40 28 76 10 81 13 52 46 83 ... |
| correct output |
|---|
| 29 |
| user output |
|---|
| 14 |
Test 10
Group: 2
Verdict: WRONG ANSWER
| input |
|---|
| 100 20 27 35 72 92 56 4 64 80 ... |
| correct output |
|---|
| 18 |
| user output |
|---|
| 1 |
Test 11
Group: 3
Verdict: WRONG ANSWER
| input |
|---|
| 100000 200000 89244 59358 22943 56710 63331 89437 56581 38400 ... |
| correct output |
|---|
| 102510 |
| user output |
|---|
| 139063 |
Test 12
Group: 3
Verdict: WRONG ANSWER
| input |
|---|
| 100000 100000 21701 85599 61542 21474 38081 29362 46316 64038 ... |
| correct output |
|---|
| 60593 |
| user output |
|---|
| 54702 |
Test 13
Group: 3
Verdict: WRONG ANSWER
| input |
|---|
| 100000 50000 86469 4833 16351 35505 59315 33011 95464 16985 ... |
| correct output |
|---|
| 35933 |
| user output |
|---|
| 19587 |
Test 14
Group: 3
Verdict: WRONG ANSWER
| input |
|---|
| 100000 40000 5392 23534 63204 45619 74330 25925 59678 88427 ... |
| correct output |
|---|
| 30074 |
| user output |
|---|
| 13767 |
Test 15
Group: 3
Verdict: WRONG ANSWER
| input |
|---|
| 100000 20000 80156 16531 71753 77661 7028 33389 17168 646 ... |
| correct output |
|---|
| 16882 |
| user output |
|---|
| 4200 |