CSES - DatatÃ¤hti Open 2017 - Results
 Task: Family reunion Sender: cuber2460 Submission time: 2017-01-21 21:36:07 +0200 Language: C++ Status: READY Result: 19
Feedback
groupverdictscore
#1UNKNOWN0
#2UNKNOWN0
#3UNKNOWN0
Test results
testverdicttimegroup
#1UNKNOWN--1details
#2UNKNOWN--2details
#3UNKNOWN--3details

### Code

```#include <iostream>
#include <cstdio>
#include <algorithm>
using namespace std;

int n, m, k;
int t[107];
int res[107];
int A = 854971895;
int B = 150918510;
int per[100007];

int main() {
ios_base::sync_with_stdio(0);
srand(5718);
cin >> n >> m >> k;
for(int i = 0; i <= 2 * k; ++i) {
cin >> t[i];
t[i]--;
long long pom = t[i];
pom *= A;
pom += B;
pom %= n;
t[i] = pom;
}

if(n <= 100000) {
for(int i = 0; i < n; ++i) per[i] = i;
random_shuffle(per, per + n);

for(int i = 0; i <= 2 * k; ++i) t[i] = per[t[i]];
}

for(int i = 0; i < 2 * k; ++i) {
if(t[i] % 2 == 0 && t[i + 1] % 2 == 1) res[i] = 1;
}

if(res[k]) cout << 'A' << endl;
else {
int x = -10;
int y = 2 * k + 10;
for(int i = 0; i < k; ++i) if(res[i]) x = i;
for(int i = 2 * k; i > k; --i) if(res[i]) y = i;

y = y - k;
x = k - x;
if(y < x) {
if(y + 1 == x) cout << 'C' << endl;
else {
if(y % 2 == 1) cout << 'B' << endl;
else cout << 'A' << endl;
}
}
else {
if(x % 2 == 1) cout << 'B' << endl;
else cout << 'A' << endl;
}
}
return 0;
}
```

### Test details

#### Test 1

Group: 1

Verdict: UNKNOWN

input
#!/bin/bash
set -e
OFFSET=\$(grep -onam1 '^__DATA_...

correct output
50

user output
(not available)

#### Test 2

Group: 2

Verdict: UNKNOWN

input
#!/bin/bash
set -e
OFFSET=\$(grep -onam1 '^__DATA_...

correct output
50

user output
(not available)

#### Test 3

Group: 3

Verdict: UNKNOWN

input
#!/bin/bash
set -e
OFFSET=\$(grep -onam1 '^__DATA_...

correct output
50

user output
(not available)