oj.uz

Submission #969829

# Submission time Handle Problem Language Result Execution time Memory
969829 2024-04-25T16:13:31 Z steveonalex Robots (APIO13_robots) C++17
60 / 100
 498 ms 163840 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
 
#define ALL(v) (v).begin(), (v).end()
#define MASK(i) (1LL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
 
// mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
mt19937_64 rng(1);
ll rngesus(ll l, ll r){return ((ull) rng()) % (r - l + 1) + l;}
 
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
 
ll LASTBIT(ll mask){return mask & (-mask);}
ll pop_cnt(ll mask){return __builtin_popcountll(mask);}
ll ctz(ll mask){return __builtin_ctzll(mask);}
ll clz(ll mask){return __builtin_clzll(mask);}
ll logOf(ll mask){return 63 - clz(mask);}
 
template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b){a = b; return true;}
        return false;
    }
template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b){a = b; return true;}
        return false;
    }
template <class T>
    void printArr(T& a, string separator = " ", string finish = "\n", ostream& out = cout){
        for(auto i: a) out << i << separator;
        out << finish;
    }
template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }

int dx[] = {1, 0, -1, 0};
int dy[] = {0, 1, 0, -1};

const int N = 505, K = 9, INF = 1e9 + 69;

enum GridObj{none=0, obstacle=1, anti_clockwise=2, clockwise=3};

int n, w, h;
int dp[K][K][N][N];
int dis[N][N][4];
bool visited[N][N][4];


GridObj grid[N][N];
pair<int, int> pos[K];

vector<array<int, 3>> q[N * N];

void dijkstra(int l, int r){
    memset(dis, 63, sizeof dis);
    memset(visited, 0, sizeof visited);
    int cnt = 0;
    if (l < r){
        for(int mid = l; mid < r; ++mid){
            for(int i = 1; i<=w; ++i) for(int j = 1;j <=h; ++j) 
                minimize(dp[l][r][i][j], dp[l][mid][i][j] + dp[mid+ 1][r][i][j]);
        }
    }
    for(int i = 1; i<=w; ++i) for(int j = 1;j <=h; ++j) if (dp[l][r][i][j] < INF) {
        for(int x = 0; x < 4; ++x){
            dis[i][j][x] = dp[l][r][i][j];
            q[dp[l][r][i][j]].push_back({{i, j, x}});
            cnt++;
        }
    }

    for(int distance = 0; cnt > 0; ++distance){
        while(q[distance].size()){
            array<int, 3> u = q[distance].back(); q[distance].pop_back();
            cnt--;

            // cout << distance << " "; printArr(u); cout.flush();

            if (visited[u[0]][u[1]][u[2]]) continue;
            visited[u[0]][u[1]][u[2]] = true;
            
            array<int, 3> v = {{u[0] + dx[u[2]], u[1]+ dy[u[2]], u[2]}};
            if (grid[v[0]][v[1]] == anti_clockwise) v[2] = (v[2] + 1) % 4;
            else if (grid[v[0]][v[1]] == clockwise) v[2] = (v[2] + 3) % 4;

            if (grid[v[0]][v[1]] == obstacle){
                minimize(dp[l][r][u[0]][u[1]], distance + 1);
                for(int x = 0; x < 4; ++x){
                    array<int, 3> v = {{u[0] + dx[x], u[1] + dy[x], x}};
                    if (grid[v[0]][v[1]] == anti_clockwise) v[2] = (v[2] + 1) % 4;
                    else if (grid[v[0]][v[1]] == clockwise) v[2] = (v[2] + 3) % 4;
                    if (grid[v[0]][v[1]] != obstacle && minimize(dis[v[0]][v[1]][v[2]], distance + 1)) {
                        q[distance + 1].push_back(v);
                        cnt++;
                    }
                }
            }
            else {
                if (minimize(dis[v[0]][v[1]][v[2]], distance)) {
                    q[distance].push_back(v);
                    cnt++;
                }
            }
        }
    }

    // for(int i = 1; i<=w; ++i) {
    //     for(int j = 1; j<=h; ++j) cout << dp[l][r][i][j] << " ";
    //     cout << "\n";
    // }
    // cout << "\n";
}

int main(void){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    cin >> n >> w >> h;
    swap(w, h);
    if (n == 1){
        cout << 0 << "\n";
        return 0;
    }
    for(int i = 0; i<=w+1; ++i) 
    for(int j = 0; j<=h+1; ++j) grid[i][j] = obstacle;
    for(int i = 0; i<w; ++i){
        string s; cin >> s;
        for(int j = 0; j<h; ++j){
            if (s[j] == '.') grid[i+1][j+1]=none;
            else if (s[j] == 'x') grid[i+1][j+1] = obstacle;
            else if (s[j] == 'A') grid[i+1][j+1] = anti_clockwise;
            else if (s[j] == 'C') grid[i+1][j+1] = clockwise;
            else {
                grid[i+1][j+1]=none;
                pos[s[j] - '0' - 1] = {i + 1, j + 1};
            }
        }
    }

    memset(dp, 63, sizeof dp);

    for(int i = 0; i<n; ++i){
        dp[i][i][pos[i].first][pos[i].second] = 0;
    }

    for(int i = n-1; i>=0; --i)
    for(int j = i; j<n; ++j){
        dijkstra(i, j);
    }
    
    int ans = INF;
    for(int i = 1; i<=w; ++i) for(int j = 1; j<=w; ++j) 
        minimize(ans, dp[0][n-1][i][j]);

    if (ans == INF) ans = -1;
    cout << ans << "\n";


    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 93276 KB Output is correct
2 Correct 14 ms 93276 KB Output is correct
3 Correct 16 ms 93128 KB Output is correct
4 Correct 13 ms 93276 KB Output is correct
5 Correct 16 ms 93276 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 93276 KB Output is correct
2 Correct 14 ms 93276 KB Output is correct
3 Correct 16 ms 93128 KB Output is correct
4 Correct 13 ms 93276 KB Output is correct
5 Correct 16 ms 93276 KB Output is correct
6 Correct 15 ms 93284 KB Output is correct
7 Correct 14 ms 93172 KB Output is correct
8 Correct 15 ms 93080 KB Output is correct
9 Correct 28 ms 93272 KB Output is correct
10 Correct 15 ms 93076 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 93276 KB Output is correct
2 Correct 14 ms 93276 KB Output is correct
3 Correct 16 ms 93128 KB Output is correct
4 Correct 13 ms 93276 KB Output is correct
5 Correct 16 ms 93276 KB Output is correct
6 Correct 15 ms 93284 KB Output is correct
7 Correct 14 ms 93172 KB Output is correct
8 Correct 15 ms 93080 KB Output is correct
9 Correct 28 ms 93272 KB Output is correct
10 Correct 15 ms 93076 KB Output is correct
11 Correct 132 ms 114524 KB Output is correct
12 Correct 2 ms 6748 KB Output is correct
13 Correct 66 ms 93364 KB Output is correct
14 Correct 275 ms 125568 KB Output is correct
15 Correct 69 ms 98560 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 93276 KB Output is correct
2 Correct 14 ms 93276 KB Output is correct
3 Correct 16 ms 93128 KB Output is correct
4 Correct 13 ms 93276 KB Output is correct
5 Correct 16 ms 93276 KB Output is correct
6 Correct 15 ms 93284 KB Output is correct
7 Correct 14 ms 93172 KB Output is correct
8 Correct 15 ms 93080 KB Output is correct
9 Correct 28 ms 93272 KB Output is correct
10 Correct 15 ms 93076 KB Output is correct
11 Correct 132 ms 114524 KB Output is correct
12 Correct 2 ms 6748 KB Output is correct
13 Correct 66 ms 93364 KB Output is correct
14 Correct 275 ms 125568 KB Output is correct
15 Correct 69 ms 98560 KB Output is correct
16 Correct 61 ms 93276 KB Output is correct
17 Runtime error 498 ms 163840 KB Execution killed with signal 9
18 Halted 0 ms 0 KB -