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Submission #36756

# Submission time Handle Problem Language Result Execution time Memory
36756 2017-12-14T12:12:01 Z RockyB Sailing Race (CEOI12_race) C++14
50 / 100
 3000 ms 6304 KB 
/// In The Name Of God

#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,sse3,sse4,popcnt,abm,mmx")

#include <bits/stdc++.h>

#define f first
#define s second

#define pb push_back
#define pp pop_back
#define mp make_pair

#define sz(x) (int)x.size()
#define sqr(x) ((x) * 1ll * (x))
#define all(x) x.begin(), x.end()

#define Kazakhstan ios_base :: sync_with_stdio(0), cin.tie(0), cout.tie(0);

#define nl '\n'
#define ioi exit(0);

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;

const int N = (int)500 + 7, inf = (int)1e9 + 7, mod = (int)1e9 + 7;
const ll linf = (ll)1e18 + 7;
const int dx[] = {-1, 0, 1, 0, 1, -1, -1, 1}, dy[] = {0, 1, 0, -1, 1, -1, 1, -1};

using namespace std;

int n, k;
vector <int> g[N];
bool ok[N][N];

int dp[N][N][2];
int dp1[N][N][2];

int nxt(int x) {
	if (x == 1) return n;
	return x - 1;
}
int prv(int x) {
	if (x == n) return 1;
	return x + 1;
}
int calc(int A, int B, int t) {
	if (~dp[A][B][t]) return dp[A][B][t];
	int res = 0;
	if (t) {
		for (int i = nxt(A); i != B; i = nxt(i)) {
			if (ok[B][i]) {
				res = max(res, calc(A, i, 1) + 1);
				res = max(res, calc(B, i, 0) + 1);
			}
		}
	}
	else {
		for (int i = prv(A); i != B; i = prv(i)) {
			if (ok[B][i]) {
				res = max(res, calc(A, i, 0) + 1);
				res = max(res, calc(B, i, 1) + 1);
			}		
		}
	}
	return dp[A][B][t] = res;
}	

int f(int A, int B, int t) {
	if (A == B) return 0;
	if (~dp1[A][B][t]) return dp1[A][B][t];
	int res = -inf;
	if (ok[A][B]) res = 0;
	if (t) {
		for (int i = nxt(A); ; i = nxt(i)) {
			if (ok[A][i]) res = max(res, f(i, B, 1) + 1);
			if (i == B) break;
		}
	}
	else {
		for (int i = prv(A); ; i = prv(i)) {
			if (ok[A][i]) res = max(res, f(i, B, 0) + 1);
			if (i == B) break;
		}
	}
	return dp1[A][B][t] = res;
}

int res[N];
void solve() {
	memset(dp1, -1, sizeof(dp1));
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= n; j++) {
	 		f(i, j, 0), f(i, j, 1);
		}
	}
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= n; j++) {
			if (ok[i][j]) {
				for (int r = nxt(j); r != i; r = nxt(r)) {
					for (int l = prv(j); l != i; l = prv(l)) {
						res[i] = max(res[i], 2 + dp1[j][r][1] + max(dp[j][l][0], dp[i][l][1]));
						res[i] = max(res[i], 2 + dp1[j][l][0] + max(dp[j][r][1], dp[i][r][0]));
					}
				}
			}
		}
	}
}
int main() {
	#ifdef IOI2018
		freopen ("in.txt", "r", stdin);
	#endif
	scanf ("%d%d", &n, &k);
	for (int i = 1; i <= n; i++) {
		int to;
		while (scanf ("%d", &to) && to) {
			ok[i][to] = 1;
		}
	}
	memset(dp, -1, sizeof(dp));
	int mx = 0, opt = -1;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= n; j++) {
			calc(i, j, 0), calc(i, j, 1);
			if (ok[i][j]) res[i] = max(res[i], max(calc(i, j, 0), calc(i, j, 1)) + 1);
			
		}
	}
	if (k == 1) solve();
	int p = max_element(res + 1, res + 1 + n) - res;
	printf ("%d\n%d", res[p], p);
	ioi
}

Compilation message

race.cpp: In function 'int main()':
race.cpp:124:6: warning: unused variable 'mx' [-Wunused-variable]
  int mx = 0, opt = -1;
      ^
race.cpp:124:14: warning: unused variable 'opt' [-Wunused-variable]
  int mx = 0, opt = -1;
              ^
race.cpp:116:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf ("%d%d", &n, &k);
                        ^

Subtask #1
50.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 6304 KB Output is correct
2 Correct 0 ms 6304 KB Output is correct
3 Incorrect 0 ms 6304 KB Output isn't correct
4 Incorrect 0 ms 6304 KB Output isn't correct
5 Correct 0 ms 6304 KB Output is correct
6 Correct 3 ms 6304 KB Output is correct
7 Correct 3 ms 6304 KB Output is correct
8 Incorrect 9 ms 6304 KB Output isn't correct
9 Correct 3 ms 6304 KB Output is correct
10 Correct 9 ms 6304 KB Output is correct
11 Correct 6 ms 6304 KB Output is correct
12 Incorrect 193 ms 6304 KB Output isn't correct
13 Incorrect 549 ms 6304 KB Output isn't correct
14 Correct 179 ms 6304 KB Output is correct
15 Execution timed out 3000 ms 6304 KB Execution timed out
16 Execution timed out 3000 ms 6304 KB Execution timed out
17 Execution timed out 3000 ms 6304 KB Execution timed out
18 Correct 309 ms 6304 KB Output is correct
19 Execution timed out 3000 ms 6304 KB Execution timed out
20 Execution timed out 3000 ms 6304 KB Execution timed out