oj.uz

Submission #364669

# Submission time Handle Problem Language Result Execution time Memory
364669 2021-02-09T17:11:45 Z Nima_Naderi Robots (APIO13_robots) C++14
60 / 100
 1500 ms 156004 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 = 15e4;
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;
    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);
                pq.push({dp[l][r][xp][yp], Pr});
            }
        }
    }
    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 79 ms 150252 KB Output is correct
2 Correct 79 ms 150252 KB Output is correct
3 Correct 79 ms 150252 KB Output is correct
4 Correct 79 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 79 ms 150252 KB Output is correct
2 Correct 79 ms 150252 KB Output is correct
3 Correct 79 ms 150252 KB Output is correct
4 Correct 79 ms 150380 KB Output is correct
5 Correct 80 ms 150380 KB Output is correct
6 Correct 79 ms 150288 KB Output is correct
7 Correct 80 ms 150380 KB Output is correct
8 Correct 80 ms 150252 KB Output is correct
9 Correct 79 ms 150252 KB Output is correct
10 Correct 82 ms 150392 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 79 ms 150252 KB Output is correct
2 Correct 79 ms 150252 KB Output is correct
3 Correct 79 ms 150252 KB Output is correct
4 Correct 79 ms 150380 KB Output is correct
5 Correct 80 ms 150380 KB Output is correct
6 Correct 79 ms 150288 KB Output is correct
7 Correct 80 ms 150380 KB Output is correct
8 Correct 80 ms 150252 KB Output is correct
9 Correct 79 ms 150252 KB Output is correct
10 Correct 82 ms 150392 KB Output is correct
11 Correct 359 ms 153320 KB Output is correct
12 Correct 109 ms 153448 KB Output is correct
13 Correct 194 ms 153320 KB Output is correct
14 Correct 841 ms 153320 KB Output is correct
15 Correct 286 ms 153320 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 79 ms 150252 KB Output is correct
2 Correct 79 ms 150252 KB Output is correct
3 Correct 79 ms 150252 KB Output is correct
4 Correct 79 ms 150380 KB Output is correct
5 Correct 80 ms 150380 KB Output is correct
6 Correct 79 ms 150288 KB Output is correct
7 Correct 80 ms 150380 KB Output is correct
8 Correct 80 ms 150252 KB Output is correct
9 Correct 79 ms 150252 KB Output is correct
10 Correct 82 ms 150392 KB Output is correct
11 Correct 359 ms 153320 KB Output is correct
12 Correct 109 ms 153448 KB Output is correct
13 Correct 194 ms 153320 KB Output is correct
14 Correct 841 ms 153320 KB Output is correct
15 Correct 286 ms 153320 KB Output is correct
16 Correct 520 ms 156004 KB Output is correct
17 Execution timed out 1600 ms 155872 KB Time limit exceeded
18 Halted 0 ms 0 KB -