oj.uz

Submission #316272

# Submission time Handle Problem Language Result Execution time Memory
316272 2020-10-25T18:50:37 Z VROOM_VARUN Wombats (IOI13_wombats) C++14
37 / 100
 8344 ms 16896 KB 
/*
ID: varunra2
LANG: C++
TASK: wombat
*/

#include <bits/stdc++.h>
#include "wombats.h"
using namespace std;

#ifdef DEBUG
#include "lib/debug.h"
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#define debug_arr(...) \
  cerr << "[" << #__VA_ARGS__ << "]:", debug_arr(__VA_ARGS__)
#pragma GCC diagnostic ignored "-Wsign-compare"
//#pragma GCC diagnostic ignored "-Wunused-parameter"
//#pragma GCC diagnostic ignored "-Wunused-variable"
#else
#define debug(...) 42
#endif

#define EPS 1e-9
#define IN(A, B, C) assert(B <= A && A <= C)
#define INF (int)1e9
#define MEM(a, b) memset(a, (b), sizeof(a))
#define MOD 1000000007
#define MP make_pair
#define PB push_back
#define all(cont) cont.begin(), cont.end()
#define rall(cont) cont.end(), cont.begin()
#define x first
#define y second

const double PI = acos(-1.0);
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef map<int, int> MPII;
typedef multiset<int> MSETI;
typedef set<int> SETI;
typedef set<string> SETS;
typedef vector<int> VI;
typedef vector<PII> VII;
typedef vector<VI> VVI;
typedef vector<string> VS;

#define rep(i, a, b) for (int i = a; i < (b); ++i)
#define trav(a, x) for (auto& a : x)
#define sz(x) (int)(x).size()
typedef pair<int, int> pii;
typedef vector<int> vi;
#pragma GCC diagnostic ignored "-Wsign-compare"
// util functions

int n, m;
int siz;

bool sub1 = false;
bool sub23 = false;
bool sub4 = false;

int ret = 0;

int hsh(int i, int j) { return i * m + j; }

PII unhsh(int h) { return MP(h / m, h % m); }

VVI h(5000, VI(200));
VVI v(5000, VI(200));
int dp[2][2][5000];

vector<VII> adj;

void addEdge(int i, int j, int k, int l, int w, bool b = false) {
  int u = hsh(i, j);
  int v = hsh(k, l);
  adj[u].PB(MP(v, w));
  if (b) adj[v].PB(MP(u, w));
}

void genAdj() {
  adj.resize(siz);
  trav(x, adj) x.clear();
  for (int i = 0; i < n - 1; i++) {
    for (int j = 0; j < m; j++) {
      addEdge(i, j, i + 1, j, v[i][j]);
    }
  }
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < m - 1; j++) {
      addEdge(i, j, i, j + 1, h[i][j], true);
    }
  }
}

int calc(int ind) {
  for (int i = 1; i < n; i++) {
    dp[ind][0][i] = min(dp[ind][0][i - 1] + v[i - 1][0],
                        dp[ind][1][i - 1] + v[i - 1][1] + h[i][0]);
    dp[ind][1][i] = min(dp[ind][1][i - 1] + v[i - 1][1],
                        dp[ind][0][i - 1] + v[i - 1][0] + h[i][0]);
  }
}

void calcDP() {
  dp[0][0][0] = 0;
  dp[0][1][0] = INF;
  dp[1][1][0] = INF;
  dp[1][0][0] = 0;
  calc(0);
  calc(1);
}

int dijk(int src, int goal) {
  VI dist(siz, 2 * INF);
  dist[src] = 0;
  priority_queue<PII, VII, greater<PII>> pq;
  pq.push(MP(0, src));
  vector<bool> vis(siz, false);
  while (!pq.empty()) {
    int u = pq.top().y;
    int d = pq.top().x;
    if (u == goal) return d;
    pq.pop();
    if (vis[u]) continue;
    vis[u] = true;
    for (auto& x : adj[u]) {
      if (dist[u] + x.y < dist[x.x]) {
        dist[x.x] = dist[u] + x.y;
        pq.push(MP(dist[x.x], x.x));
      }
    }
  }
  return 2 * INF;
}

void init(int R, int C, int H[5000][200], int V[5000][200]) {
  if (C == 1)
    sub1 = true;
  else if (C == 2)
    sub4 = true;
  else
    sub23 = true;
  n = R;
  m = C;
  siz = n * m;
  for (int i = 0; i < 5000; i++) {
    for (int j = 0; j < 200; j++) {
      h[i][j] = H[i][j];
      v[i][j] = V[i][j];
    }
  }
  if (sub23) genAdj();
  for (int i = 0; i < 5000; i++) {
    ret += v[i][0];
  }
}

void changeV(int p, int q, int w) {
  ret -= v[p][q];
  ret += w;
  v[p][q] = w;
  genAdj();
}

void changeH(int p, int q, int w) {
  ret -= h[p][q];
  ret += w;
  h[p][q] = w;
  genAdj();
}

int escape(int a, int b) {
  if (sub1) return ret;
  if (sub23) return dijk(hsh(0, a), hsh(n - 1, b));
  if (sub4) return dp[a][b][n - 1];
}

// int main() {
// #ifndef ONLINE_JUDGE
//   freopen("wombat.in", "r", stdin);
//   freopen("wombat.out", "w", stdout);
// #endif
//   cin.sync_with_stdio(0);
//   cin.tie(0);

//   int r, c;
//   int h[5000][200];
//   int v[5000][200];

//   cin >> r >> c;

//   rep(i, 0, r) rep(j, 0, c - 1) cin >> h[i][j];
//   rep(i, 0, r - 1) rep(j, 0, c) cin >> v[i][j];

//   init(r, c, h, v);
//   debug("done");
//   int q;
//   cin >> q;

//   while (q--) {
//     int type;
//     cin >> type;
//     if (type == 0) {
//       int a, b;
//       cin >> a >> b;
//       cout << escape(a, b) << '\n';
//     } else if (type == 1) {
//       int p, q, w;
//       cin >> p >> q >> w;
//       changeV(p, q, w);
//     } else {
//       int p, q, w;
//       cin >> p >> q >> w;
//       changeH(p, q, w);
//     }
//     debug("done");
//   }

//   return 0;
// }

Compilation message

grader.c: In function 'int main()':
grader.c:15:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
   15 |  int res;
      |      ^~~
wombats.cpp: In function 'int calc(int)':
wombats.cpp:104:1: warning: no return statement in function returning non-void [-Wreturn-type]
  104 | }
      | ^
wombats.cpp: In function 'int escape(int, int)':
wombats.cpp:178:1: warning: control reaches end of non-void function [-Wreturn-type]
  178 | }
      | ^

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 50 ms 12672 KB Output is correct
2 Correct 48 ms 12672 KB Output is correct
3 Correct 133 ms 14328 KB Output is correct
4 Correct 49 ms 12672 KB Output is correct
5 Correct 49 ms 12776 KB Output is correct
6 Correct 8 ms 8576 KB Output is correct
7 Correct 9 ms 8576 KB Output is correct
8 Correct 8 ms 8576 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 8576 KB Output is correct
2 Correct 8 ms 8704 KB Output is correct
3 Correct 8 ms 8576 KB Output is correct
4 Correct 25 ms 8576 KB Output is correct
5 Correct 18 ms 8680 KB Output is correct
6 Correct 19 ms 8576 KB Output is correct
7 Correct 25 ms 8576 KB Output is correct
8 Correct 22 ms 8680 KB Output is correct
9 Correct 25 ms 8576 KB Output is correct
10 Correct 24 ms 8576 KB Output is correct
11 Correct 8344 ms 9936 KB Output is correct
12 Correct 34 ms 8828 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 192 ms 9472 KB Output is correct
2 Correct 207 ms 9692 KB Output is correct
3 Correct 195 ms 9472 KB Output is correct
4 Correct 192 ms 9472 KB Output is correct
5 Correct 192 ms 9472 KB Output is correct
6 Correct 9 ms 8704 KB Output is correct
7 Correct 8 ms 8576 KB Output is correct
8 Correct 8 ms 8576 KB Output is correct
9 Correct 395 ms 9600 KB Output is correct
10 Correct 8 ms 8576 KB Output is correct

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 143 ms 16896 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 190 ms 9472 KB Output is correct
2 Correct 214 ms 9860 KB Output is correct
3 Correct 197 ms 9472 KB Output is correct
4 Correct 195 ms 9472 KB Output is correct
5 Correct 191 ms 9472 KB Output is correct
6 Incorrect 144 ms 16896 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #6
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 192 ms 9472 KB Output is correct
2 Correct 208 ms 9652 KB Output is correct
3 Correct 196 ms 9472 KB Output is correct
4 Correct 194 ms 9472 KB Output is correct
5 Correct 190 ms 9472 KB Output is correct
6 Incorrect 143 ms 16896 KB Output isn't correct
7 Halted 0 ms 0 KB -