oj.uz

Submission #364680

# Submission time Handle Problem Language Result Execution time Memory
364680 2021-02-09T17:18:42 Z Nima_Naderi Robots (APIO13_robots) C++14
60 / 100
 1457 ms 155876 KB 
///In the name of GOD
//#pragma GCC optimize("O2")
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC target("avx,avx2,sse,sse2,fma")
#include<bits/stdc++.h>
using namespace std;

typedef int ll;
typedef pair<ll, ll> pll;
const ll MXN = 500 + 2;
const ll MXK = 12;
const ll INF = 1e9;
const ll Tof = 8e4;
const ll TOF = 1e5;
ll n, m, k;
int dp[MXK][MXK][MXN][MXN];
pair<int, int> dest[MXN][MXN][4], Pr;
vector<pair<ll, ll>> dir = {{0, 1}, {1, 0}, {0, -1}, {-1, 0}}; // R, D, L, U
priority_queue<pair<ll, pll>, vector<pair<ll, pll>>, greater<pair<ll, pll>>> pq;
string s[MXN];
bool vis[MXN][MXN][4], ok[MXN][MXN][4];
bool mark[MXN][MXN];
bool check(ll x, ll y){
    return (1 <= x && x <= n && 1 <= y && y <= m);
}
pair<int, int> go(ll x, ll y, ll d){
    if(vis[x][y][d]) return {-1, -1};
    if(ok[x][y][d]) return dest[x][y][d];
    ll nd = d;
    if(s[x][y] == 'A') nd = (nd + 3) % 4;
    if(s[x][y] == 'C') nd = (nd + 1) % 4;
    ll dx, dy; tie(dx, dy) = dir[nd];
    if(check(x + dx, y + dy) && s[x + dx][y + dy] != 'x'){
        vis[x][y][d] = 1;
        dest[x][y][d] = go(x + dx, y + dy, nd);
        ok[x][y][d] = 1;
        vis[x][y][d] = 0;
        return dest[x][y][d];
    }
    dest[x][y][d] = {x, y};
    ok[x][y][d] = 1;
    return dest[x][y][d];
}
void BFS(ll l, ll r){
    pair<ll, ll> pr;
    ll tof = Tof, tt = 0;
    while(!pq.empty() && tof){
        int d; tie(d, pr) = pq.top(); pq.pop();
        ll x, y; tie(x, y) = pr;
        if(mark[x][y]) continue;
        mark[x][y] = 1;
        tof --;
        for(int dr = 0; dr < 4; dr ++){
            ll xp, yp; tie(xp, yp) = dest[x][y][dr];
            if(xp == -1 || yp == -1 || mark[xp][yp]) continue;
            if(d + 1 < dp[l][r][xp][yp]){
                dp[l][r][xp][yp] = d + 1;
                Pr = make_pair(xp, yp);
                if(tt < TOF) pq.push({dp[l][r][xp][yp], Pr}), tt ++;
            }
        }
    }
    while(!pq.empty()) pq.pop();
}
int main(){
    ios::sync_with_stdio(0);cin.tie(0); cout.tie(0);
    memset(dest, -1, sizeof dest), memset(dp, 63, sizeof dp);
    cin >> k >> n >> m; swap(n, m);
    for(int i = 1; i <= n; i ++){
        cin >> s[i];
        s[i] = "$" + s[i];
    }
    for(int i = 1; i <= n; i ++){
        for(int j = 1; j <= m; j ++){
            if(s[i][j] == 'x') continue;
            for(int d = 0; d < 4; d ++) dest[i][j][d] = go(i, j, d);
        }
    }
    for(int i = 1; i <= k; i ++){
        for(int x = 1; x <= n; x ++){
            for(int y = 1; y <= m; y ++){
                if(s[x][y] == char(i + '0')){
                    dp[i][i][x][y] = 0;
                }
                Pr = make_pair(x, y);
                pq.push({dp[i][i][x][y], Pr});
                mark[x][y] = 0;
            }
        }
        BFS(i, i);
    }
    for(int len = 2; len <= k; len ++){
        for(int l = 1, r = len; r <= k; l ++, r ++){
            for(int x = 1; x <= n; x ++){
                for(int y = 1; y <= m; y ++){
                    for(int mid = l; mid < r; mid ++){
                        dp[l][r][x][y] = min(dp[l][r][x][y], dp[l][mid][x][y] + dp[mid + 1][r][x][y]);
                    }
                    if(dp[l][r][x][y] < INF){
                        Pr = make_pair(x, y);
                        pq.push({dp[l][r][x][y], Pr});
                        mark[x][y] = 0;
                    }
                }
            }
            BFS(l, r);
        }
    }
    int ans = INF;
    for(int x = 1; x <= n; x ++){
        for(int y = 1; y <= m; y ++){
            ans = min(ans, dp[1][k][x][y]);
        }
    }
    cout << (ans == INF ? -1 : ans) << '\n';
    return 0;
}
/*!
    HE'S AN INSTIGATOR,
    ENEMY ELIMINATOR,
    AND WHEN HE KNOCKS YOU BETTER
    YOU BETTER LET HIM IN.
*/
//! N.N

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 78 ms 150380 KB Output is correct
2 Correct 80 ms 150252 KB Output is correct
3 Correct 82 ms 150252 KB Output is correct
4 Correct 79 ms 150508 KB Output is correct
5 Correct 78 ms 150380 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 78 ms 150380 KB Output is correct
2 Correct 80 ms 150252 KB Output is correct
3 Correct 82 ms 150252 KB Output is correct
4 Correct 79 ms 150508 KB Output is correct
5 Correct 78 ms 150380 KB Output is correct
6 Correct 79 ms 150252 KB Output is correct
7 Correct 81 ms 150252 KB Output is correct
8 Correct 79 ms 150252 KB Output is correct
9 Correct 81 ms 150252 KB Output is correct
10 Correct 83 ms 150364 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 78 ms 150380 KB Output is correct
2 Correct 80 ms 150252 KB Output is correct
3 Correct 82 ms 150252 KB Output is correct
4 Correct 79 ms 150508 KB Output is correct
5 Correct 78 ms 150380 KB Output is correct
6 Correct 79 ms 150252 KB Output is correct
7 Correct 81 ms 150252 KB Output is correct
8 Correct 79 ms 150252 KB Output is correct
9 Correct 81 ms 150252 KB Output is correct
10 Correct 83 ms 150364 KB Output is correct
11 Correct 359 ms 153320 KB Output is correct
12 Correct 110 ms 153344 KB Output is correct
13 Correct 192 ms 153320 KB Output is correct
14 Correct 869 ms 153320 KB Output is correct
15 Correct 292 ms 153320 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 78 ms 150380 KB Output is correct
2 Correct 80 ms 150252 KB Output is correct
3 Correct 82 ms 150252 KB Output is correct
4 Correct 79 ms 150508 KB Output is correct
5 Correct 78 ms 150380 KB Output is correct
6 Correct 79 ms 150252 KB Output is correct
7 Correct 81 ms 150252 KB Output is correct
8 Correct 79 ms 150252 KB Output is correct
9 Correct 81 ms 150252 KB Output is correct
10 Correct 83 ms 150364 KB Output is correct
11 Correct 359 ms 153320 KB Output is correct
12 Correct 110 ms 153344 KB Output is correct
13 Correct 192 ms 153320 KB Output is correct
14 Correct 869 ms 153320 KB Output is correct
15 Correct 292 ms 153320 KB Output is correct
16 Correct 495 ms 155876 KB Output is correct
17 Incorrect 1457 ms 155872 KB Output isn't correct
18 Halted 0 ms 0 KB -