#define DEBUG 0
#include <bits/stdc++.h>
using namespace std;
#if DEBUG
// basic debugging macros
int __i__,__j__;
#define printLine(l) for(__i__=0;__i__<l;__i__++){cout<<"-";}cout<<endl
#define printLine2(l,c) for(__i__=0;__i__<l;__i__++){cout<<c;}cout<<endl
#define printVar(n) cout<<#n<<": "<<n<<endl
#define printArr(a,l) cout<<#a<<": ";for(__i__=0;__i__<l;__i__++){cout<<a[__i__]<<" ";}cout<<endl
#define print2dArr(a,r,c) cout<<#a<<":\n";for(__i__=0;__i__<r;__i__++){for(__j__=0;__j__<c;__j__++){cout<<a[__i__][__j__]<<" ";}cout<<endl;}
#define print2dArr2(a,r,c,l) cout<<#a<<":\n";for(__i__=0;__i__<r;__i__++){for(__j__=0;__j__<c;__j__++){cout<<setw(l)<<setfill(' ')<<a[__i__][__j__]<<" ";}cout<<endl;}
// advanced debugging class
// debug 1,2,'A',"test";
class _Debug {
public:
template<typename T>
_Debug& operator,(T val) {
cout << val << endl;
return *this;
}
};
#define debug _Debug(),
#else
#define printLine(l)
#define printLine2(l,c)
#define printVar(n)
#define printArr(a,l)
#define print2dArr(a,r,c)
#define print2dArr2(a,r,c,l)
#define debug
#endif
// define
#define MAX_VAL 999999999
#define MAX_VAL_2 999999999999999999LL
#define EPS 1e-6
#define mp make_pair
#define pb push_back
// typedef
typedef unsigned int UI;
typedef long long int LLI;
typedef unsigned long long int ULLI;
typedef unsigned short int US;
typedef pair<int,int> pii;
typedef pair<LLI,LLI> plli;
typedef vector<int> vi;
typedef vector<LLI> vlli;
typedef vector<pii> vpii;
typedef vector<plli> vplli;
// ---------- END OF TEMPLATE ----------
int adjMat[500][500];
int dp[500][500][2],dp2[500][500][2];
int main() {
int i;
int N,K,x;
scanf("%d %d",&N,&K);
for (i = 0; i < N; i++) {
while (1) {
scanf("%d",&x),x--;
if (x == -1) break;
else adjMat[i][x] = 1;
}
}
int j,k,l;
for (i = 2; i <= N; i++) {
for (j = 0; j < N; j++) {
k = (j+i-1) % N;
for (l = (j+1) % N; l != k; l++,l %= N) {
if (adjMat[j][l]) dp[j][k][0] = max(dp[j][k][0],max(dp[j][l][1],dp[l][k][0])+1);
if (adjMat[k][l]) dp[j][k][1] = max(dp[j][k][1],max(dp[j][l][1],dp[l][k][0])+1);
}
}
}
for (i = 2; i <= N; i++) {
for (j = 0; j < N; j++) {
k = (j+i-1) % N;
dp2[j][k][0] = dp2[j][k][1] = -999;
if (adjMat[j][k]) dp2[j][k][0] = 1;
if (adjMat[k][j]) dp2[j][k][1] = 1;
for (l = (j+1) % N; l != k; l++,l %= N) {
if (adjMat[j][l]) dp2[j][k][0] = max(dp2[j][k][0],dp2[l][k][0]+1);
if (adjMat[k][l]) dp2[j][k][1] = max(dp2[j][k][1],dp2[j][l][1]+1);
}
}
}
if (K == 0) {
int M = -1,p = -1;
for (i = 0; i < N; i++) {
for (j = 0; j < N; j++) {
if ((i != j) && adjMat[i][j]) {
if ((dp[i][j][1] > M) || (dp[j][i][0] > M)) M = max(dp[i][j][1],dp[j][i][0]),p = i;
}
}
}
printf("%d\n%d\n",M+1,p+1);
}
else {
int M = -1,p = -1;
for (i = 0; i < N; i++) {
for (j = 0; j < N; j++) {
if ((i != j) && adjMat[i][j]) {
if ((max(dp[i][j][1],dp[j][i][0])+1) > M) M = max(dp[i][j][1],dp[j][i][0])+1,p = i;
}
}
}
for (i = 0; i < N; i++) {
for (j = 0; j < N; j++) {
if ((i == j) || !adjMat[i][j]) continue;
for (k = (i+1) % N; k != j; k++,k %= N) {
for (l = (j+1) % N; l != i; l++,l %= N) {
if (adjMat[k][l]) {
if ((dp2[k][j][1]+max(dp[l][i][0],dp[j][l][1])+2) > M) M = dp2[k][j][1]+max(dp[l][i][0],dp[j][l][1])+2,p = i;
if ((dp2[j][l][0]+max(dp[k][j][0],dp[i][k][1])+2) > M) M = dp2[j][l][0]+max(dp[k][j][0],dp[i][k][1])+2,p = i;
}
}
}
}
}
printf("%d\n%d\n",M,p+1);
}
return 0;
}
Compilation message
race.cpp: In function 'int main()':
race.cpp:63:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d",&N,&K);
~~~~~^~~~~~~~~~~~~~~
race.cpp:66:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d",&x),x--;
~~~~~~~~~~~~~~^~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
3 ms |
508 KB |
Output is correct |
| 3 |
Correct |
3 ms |
696 KB |
Output is correct |
| 4 |
Correct |
5 ms |
868 KB |
Output is correct |
| 5 |
Correct |
5 ms |
876 KB |
Output is correct |
| 6 |
Correct |
14 ms |
1020 KB |
Output is correct |
| 7 |
Correct |
10 ms |
1144 KB |
Output is correct |
| 8 |
Correct |
23 ms |
1272 KB |
Output is correct |
| 9 |
Correct |
18 ms |
1272 KB |
Output is correct |
| 10 |
Correct |
16 ms |
1400 KB |
Output is correct |
| 11 |
Correct |
25 ms |
1400 KB |
Output is correct |
| 12 |
Correct |
687 ms |
2680 KB |
Output is correct |
| 13 |
Incorrect |
1757 ms |
3596 KB |
Output isn't correct |
| 14 |
Correct |
808 ms |
4528 KB |
Output is correct |
| 15 |
Execution timed out |
3032 ms |
5444 KB |
Time limit exceeded |
| 16 |
Execution timed out |
3027 ms |
5452 KB |
Time limit exceeded |
| 17 |
Execution timed out |
3012 ms |
5452 KB |
Time limit exceeded |
| 18 |
Correct |
1534 ms |
5612 KB |
Output is correct |
| 19 |
Execution timed out |
3051 ms |
5612 KB |
Time limit exceeded |
| 20 |
Execution timed out |
3029 ms |
5612 KB |
Time limit exceeded |
