oj.uz

Submission #364688

# Submission time Handle Problem Language Result Execution time Memory
364688 2021-02-09T17:27:09 Z Nima_Naderi Robots (APIO13_robots) C++14
60 / 100
 1500 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 = 9e4;
const ll TOF = 2e5;
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);
}
void go(ll x, ll y, ll d){
    if(vis[x][y][d]){
        dest[x][y][d] = {-1, -1};
        return;
    }
    if(ok[x][y][d]) return;
    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;
        go(x + dx, y + dy, nd);
        dest[x][y][d] = dest[x + dx][y + dy][nd];
        ok[x][y][d] = 1;
        vis[x][y][d] = 0;
        return;
    }
    dest[x][y][d] = {x, y};
    ok[x][y][d] = 1;
}
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 ++) 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 94 ms 150252 KB Output is correct
2 Correct 83 ms 150252 KB Output is correct
3 Correct 89 ms 150252 KB Output is correct
4 Correct 82 ms 150380 KB Output is correct
5 Correct 80 ms 150380 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 94 ms 150252 KB Output is correct
2 Correct 83 ms 150252 KB Output is correct
3 Correct 89 ms 150252 KB Output is correct
4 Correct 82 ms 150380 KB Output is correct
5 Correct 80 ms 150380 KB Output is correct
6 Correct 80 ms 150300 KB Output is correct
7 Correct 95 ms 150252 KB Output is correct
8 Correct 81 ms 150252 KB Output is correct
9 Correct 82 ms 150252 KB Output is correct
10 Correct 80 ms 150380 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 94 ms 150252 KB Output is correct
2 Correct 83 ms 150252 KB Output is correct
3 Correct 89 ms 150252 KB Output is correct
4 Correct 82 ms 150380 KB Output is correct
5 Correct 80 ms 150380 KB Output is correct
6 Correct 80 ms 150300 KB Output is correct
7 Correct 95 ms 150252 KB Output is correct
8 Correct 81 ms 150252 KB Output is correct
9 Correct 82 ms 150252 KB Output is correct
10 Correct 80 ms 150380 KB Output is correct
11 Correct 364 ms 153284 KB Output is correct
12 Correct 104 ms 153320 KB Output is correct
13 Correct 190 ms 153320 KB Output is correct
14 Correct 852 ms 153320 KB Output is correct
15 Correct 285 ms 153308 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 94 ms 150252 KB Output is correct
2 Correct 83 ms 150252 KB Output is correct
3 Correct 89 ms 150252 KB Output is correct
4 Correct 82 ms 150380 KB Output is correct
5 Correct 80 ms 150380 KB Output is correct
6 Correct 80 ms 150300 KB Output is correct
7 Correct 95 ms 150252 KB Output is correct
8 Correct 81 ms 150252 KB Output is correct
9 Correct 82 ms 150252 KB Output is correct
10 Correct 80 ms 150380 KB Output is correct
11 Correct 364 ms 153284 KB Output is correct
12 Correct 104 ms 153320 KB Output is correct
13 Correct 190 ms 153320 KB Output is correct
14 Correct 852 ms 153320 KB Output is correct
15 Correct 285 ms 153308 KB Output is correct
16 Correct 506 ms 155876 KB Output is correct
17 Execution timed out 1602 ms 155872 KB Time limit exceeded
18 Halted 0 ms 0 KB -