oj.uz

Submission #260160

# Submission time Handle Problem Language Result Execution time Memory
260160 2020-08-09T12:19:17 Z MiricaMatei Sailing Race (CEOI12_race) C++14
40 / 100
 2110 ms 10644 KB 
#include <bits/stdc++.h>

using namespace std;

const int MAXN = 505;

int n;
vector<int>G[MAXN];
int dp1[MAXN][MAXN][3];
int dp2[MAXN][MAXN][3];
int mc[MAXN][MAXN];
int first[MAXN][MAXN][3];

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 solve1(int x, int y, int t) {
  if (dp1[x][y][t] != -1)
    return dp1[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, 1 + max(solve1(x, i, 0), solve1(y, i, 1)));
    dp1[x][y][t] = mx;
  } else {
    int mx = 0;
    for (int i = y; i != x; i = nxt(i))
      if (mc[y][i])
        mx = max(mx, 1 + max(solve1(y, i, 0), solve1(x, i, 1)));
    dp1[x][y][t] = mx;
  }
  return dp1[x][y][t];
}

bool in(int i, int k, int l, int t) {
  if (t == 0) {
    if (k > l) {
      if (k > i && i > l)
        return 1;
      return 0;
    } else {
      if (l > i && i > k)
        return 0;
      return 1;
    }
  } else {
    if (k > l) {
      if (k > i && i > l)
        return 0;
      return 1;
    } else {
      if (l > i && i > k)
        return 1;
      return 0;
    }
  }
}

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

  int p;
  scanf("%d%d", &n, &p);
  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)
      for (int t = 0; t <= 1; ++t)
        dp1[i][j][t] = dp2[i][j][t] = -1;
  }

  for (int i = 1; i <= n; ++i)
    for (int j = 1; j <= n; ++j) {
      dp1[i][j][0] = solve1(i, j, 0);
      dp1[i][j][1] = solve1(i, j, 1);
    }
  for (int i = 1; i <= n; ++i)
    for (int j = 1; j <= n; ++j) {
      for (int t = 0; t <= 1; ++t) {
        if (mc[i][j]) {
          dp1[i][j][t] = max(dp1[i][j][t], 0);
          dp1[i][j][t]++;
        }
      }
    }

  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 (mc[i][j] && dp1[i][j][t] > ans) {
          ans = dp1[i][j][t];
          w = i;
        }

  if (p == 1) {
    for (int j = 1; j <= n; ++j) {
      for (int k = prv(j); k != j; k = prv(k)) {
        for (int i = prv(k); i != j; i = prv(i)) {
          if (mc[i][j]) {
            first[j][k][0] = i;
            break;
          }
        }
      }
      for (int k = nxt(j); k != j; k = nxt(k)) {
        for (int i = nxt(k); i != j; i = nxt(i)) {
          if (mc[i][j]) {
            first[j][k][1] = i;
            break;
          }
        }
      }
    }
    for (int i = 1; i <= n; ++i) {
      for (int j = nxt(i); j != i; j = nxt(j)) {
        if (mc[j][i])
          dp2[j][i][0] = 1;
        for (int k = prv(j); k != i; k = prv(k))
          if (mc[j][k])
            dp2[j][i][0] = max(dp2[j][i][0], dp2[k][i][0] + 1);
      }
      for (int j = prv(i); j != i; j = prv(j)) {
        if (mc[j][i])
          dp2[j][i][1] = 1;
        for (int k = nxt(j); k != i; k = nxt(k))
          if (mc[j][k])
            dp2[j][i][1] = max(dp2[j][i][1], dp2[k][i][1] + 1);
      }
    }
    for (int j = 1; j <= n; ++j) {
      for (int k = prv(j); k != j; k = prv(k)) {
        for (int l = nxt(j); l != j; l = nxt(l)) {
          if (mc[k][l]) {
            int i = first[j][k][0];
            if (i == 0 || in(i, k, l, 0) == in(j, k, l, 0))
              continue;
            int sol = 1 + dp2[j][k][0] + 1 + max(dp1[j][l][0] - mc[j][l], dp1[i][l][1] - mc[i][l]);
            if (sol > ans) {
              ans = sol;
              w = i;
            }
          }
        }
      }
      for (int k = nxt(j); k != j; k = nxt(k)) {
        for (int l = prv(j); l != j; l = prv(l)) {
          if (mc[k][l]) {
            int i = first[j][k][1];
            if (i == 0 || in(i, k, l, 1) == in(j, k, l, 0))
              continue;
            int sol = 1 + dp2[j][k][1] + 1 + max(dp1[j][l][1] - mc[j][l], dp1[i][l][0] - mc[i][l]);
            if (sol > ans) {
              ans = sol;
              w = i;
            }
          }
        }
      }
    }

  }

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

  return 0;
}

Compilation message

race.cpp: In function 'int main()':
race.cpp:76:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &n, &p);
   ~~~~~^~~~~~~~~~~~~~~~
race.cpp:79:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &x);
     ~~~~~^~~~~~~~~~
race.cpp:83:12: 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 0 ms 384 KB Output is correct
2 Incorrect 1 ms 640 KB Output isn't correct
3 Incorrect 1 ms 768 KB Output isn't correct
4 Incorrect 2 ms 1024 KB Output isn't correct
5 Correct 2 ms 896 KB Output is correct
6 Incorrect 5 ms 1280 KB Output isn't correct
7 Correct 4 ms 1152 KB Output is correct
8 Incorrect 9 ms 1664 KB Output isn't correct
9 Correct 7 ms 1408 KB Output is correct
10 Correct 9 ms 1664 KB Output is correct
11 Correct 10 ms 1664 KB Output is correct
12 Incorrect 128 ms 4344 KB Output isn't correct
13 Incorrect 304 ms 6264 KB Output isn't correct
14 Correct 170 ms 5888 KB Output is correct
15 Incorrect 1569 ms 10360 KB Output isn't correct
16 Incorrect 1844 ms 10520 KB Output isn't correct
17 Incorrect 1580 ms 10488 KB Output isn't correct
18 Correct 287 ms 7296 KB Output is correct
19 Incorrect 2110 ms 10616 KB Output isn't correct
20 Incorrect 2100 ms 10644 KB Output isn't correct