Submission #260099

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
260099	2020-08-09T09:57:44 Z	MiricaMatei	Sailing Race (CEOI12_race)	C++14	40 / 100	537 ms	4856 KB

race

#include <bits/stdc++.h>

using namespace std;

const int MAXN = 505;

int n;
vector<int>G[MAXN];
int dp[MAXN][MAXN][3];
int mc[MAXN][MAXN];

int prv(int i) {
  i--;
  if (i == 0)
    i = n;
  return i;
}

int nxt(int i) {
  i++;
  if (i == n + 1)
    i = 1;
  return i;
}

int solve(int x, int y, int t) {
  if (dp[x][y][t] != -1)
    return dp[x][y][t];
  if (t == 0) {
    int mx = 0;
    for (int i = y; i != x; i = prv(i))
      if (mc[y][i])
        mx = max(mx, max(solve(x, i,  0), solve(y, i, 1)));
    dp[x][y][t] = 1 + mx;
  } else {
    int mx = 0;
    for (int i = y; i != x; i = nxt(i))
      if (mc[y][i])
        mx = max(mx, max(solve(y, i, 0), solve(x, i, 1)));
    dp[x][y][t] = 1 + mx;
  }
  return dp[x][y][t];
}

int main() {
  //freopen("date.in", "r", stdin);
  //freopen("date.out", "w", stdout);

  int k;
  scanf("%d%d", &n, &k);
  for (int i = 1; i <= n; ++i) {
    int x;
    scanf("%d", &x);
    while (x != 0) {
      G[i].push_back(x);
      mc[i][x] = 1;
      scanf("%d", &x);
    }
    for (int j = 1; j <= n; ++j)
      dp[i][j][0] = dp[i][j][1] = -1;
  }

  for (int i = 1; i <= n; ++i)
    for (int j = 1; j <= n; ++j)
      if (mc[i][j]) {
        dp[i][j][0] = solve(i, j, 0);
        dp[i][j][1] = solve(i, j, 1);
      }

  int ans = 0, w = 0;
  for (int i = 1; i <= n; ++i)
    for (int j = 1; j <= n; ++j)
      for (int t = 0; t <= 1; ++t)
        if (dp[i][j][t] > ans) {
          ans = dp[i][j][t];
          w = i;
        }

  printf("%d\n%d\n", ans, w);

  return 0;
}

Compilation message

race.cpp: In function 'int main()':
race.cpp:50:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &n, &k);
   ~~~~~^~~~~~~~~~~~~~~~
race.cpp:53:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &x);
     ~~~~~^~~~~~~~~~
race.cpp:57:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%d", &x);
       ~~~~~^~~~~~~~~~

Subtask #1

40.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	384 KB	Output is correct
2	Incorrect	1 ms	512 KB	Output isn't correct
3	Incorrect	1 ms	512 KB	Output isn't correct
4	Incorrect	1 ms	640 KB	Output isn't correct
5	Correct	2 ms	640 KB	Output is correct
6	Incorrect	2 ms	672 KB	Output isn't correct
7	Correct	1 ms	768 KB	Output is correct
8	Incorrect	2 ms	896 KB	Output isn't correct
9	Correct	6 ms	1024 KB	Output is correct
10	Correct	8 ms	1152 KB	Output is correct
11	Correct	8 ms	1152 KB	Output is correct
12	Incorrect	31 ms	1920 KB	Output isn't correct
13	Incorrect	66 ms	2816 KB	Output isn't correct
14	Correct	144 ms	3704 KB	Output is correct
15	Incorrect	375 ms	4480 KB	Output isn't correct
16	Incorrect	475 ms	4728 KB	Output isn't correct
17	Incorrect	379 ms	4480 KB	Output isn't correct
18	Correct	199 ms	4472 KB	Output is correct
19	Incorrect	537 ms	4736 KB	Output isn't correct
20	Incorrect	519 ms	4856 KB	Output isn't correct