oj.uz

Submission #122410

# Submission time Handle Problem Language Result Execution time Memory
122410 2019-06-28T07:19:35 Z jakob_nogler Robots (APIO13_robots) C++14
30 / 100
 429 ms 114552 KB 
#include <bits/stdc++.h>
#define fi first
#define se second
    
using namespace std;
    
typedef short int si;
typedef pair<si, si> pii;
typedef tuple<si, si, si> tiii;
typedef tuple<si, si, si, si> tiiii;
    
const int N = 355, dir = 4, R = 9, inf = 10e8, sum = R * (R + 1) / 2;
const int lim = N * N / 4;

pii nxt[N][N][dir];
int cost[R][N][N], dp[sum][N][N], dict[R][R];
char grid[N][N];
int n, w, h;
    
int dr[dir] = {1, 0, - 1, 0};
int dc[dir] = {0, 1, 0, - 1}; //down, right, up, left
    
queue<tiiii> q3[N * N];
    
int main(){
    cin >> n >> w >> h;
    w += 2; h += 2;
    for(int i = 0; i < h; i++)
        for(int j = 0; j < w; j++){
            grid[i][j] = 'x';
            for(int k = 0; k < dir; k++)
                nxt[i][j][k] = {- 1, - 1};
            for(int k = 0; k < n; k++)
                cost[k][i][j] = - 1;
            for(int k = 0; k < sum; k++)
                dp[k][i][j] = inf;
        }
    
    int idx = 0;
    for(int i = 0; i < R; i++)
        for(int j = i; j < R; j++)
            dict[i][j] = idx++;
    
    queue<tiii> q0, q1;
    for(int i = 1; i < h - 1; i++)
        for(int j = 1; j < w - 1; j++){
            cin >> grid[i][j];
            if(grid[i][j] >= '1' && grid[i][j] <= '9'){
                cost[grid[i][j] - '1'][i][j] = 0;
                q1.push({grid[i][j] - '1', i, j});
            }
        }
    
    for(int i = 1; i < h - 1; i++)
        for(int j = 1; j < w - 1; j++)
            for(int k = 0; k < dir; k++)
                if(grid[i][j] != 'x' && grid[i + dr[k]][j + dc[k]] == 'x'){
                    q0.push({i, j, k});
                    nxt[i][j][k] = {i, j};
                }
    
    while(!q0.empty()){
        tiii curr = q0.front();
        q0.pop();
        int d = get<2>(curr), id, mov;
        pii pos = {get<0>(curr), get<1>(curr)};
    
        if(grid[pos.fi][pos.se] == 'A') mov = (d + 1) % 4, id = (d + 3) % 4;
        else if(grid[pos.fi][pos.se] == 'C') mov = (d + 3) % 4, id = (d + 1) % 4;
        else mov = (d + 2) % 4, id = d;
        if(grid[pos.fi + dr[mov]][pos.se + dc[mov]] == 'x') continue;
        nxt[pos.fi + dr[mov]][pos.se + dc[mov]][id] = nxt[pos.fi][pos.se][d];
        q0.push({pos.fi + dr[mov], pos.se + dc[mov], id});
    }
    
    while(!q1.empty()){
        tiii curr = q1.front();
        q1.pop();
        int r = get<0>(curr);
        pii pos = {get<1>(curr), get<2>(curr)};
    
        dp[dict[r][r]][pos.fi][pos.se] = cost[r][pos.fi][pos.se];
        q3[cost[r][pos.fi][pos.se]].push({r, r, pos.fi, pos.se});
    
        for(int i = 0; i < dir; i++){
            pii nn = nxt[pos.fi][pos.se][i];
            if(cost[r][nn.fi][nn.se] == - 1){
                cost[r][nn.fi][nn.se] = cost[r][pos.fi][pos.se] + 1;
                q1.push({r, nn.fi, nn.se});
            }
        }
    }
    
    for(int v = 0; v < N * N; v++){
        while(!q3[v].empty()){
            tiiii curr = q3[v].front();
            q3[v].pop();
    
            int lo = get<0>(curr), hi = get<1>(curr);
            pii pos = {get<2>(curr), get<3>(curr)};
    
            if(lo == 0 && hi == n - 1){
                cout << v << endl;
                return 0;
            }
    
            if(dp[dict[lo][hi]][pos.fi][pos.se] < v) continue;
            for(int i = hi + 1; i < n; i++)
                if(dp[dict[lo][i]][pos.fi][pos.se] > dp[dict[hi + 1][i]][pos.fi][pos.se] + dp[dict[lo][hi]][pos.fi][pos.se]){
                    int val = dp[dict[lo][i]][pos.fi][pos.se] = dp[dict[hi + 1][i]][pos.fi][pos.se] + dp[dict[lo][hi]][pos.fi][pos.se];
                    if(val < lim) q3[dp[dict[lo][i]][pos.fi][pos.se]].push({lo, i, pos.fi, pos.se});
                }
            for(int i = lo - 1; i >= 0; i--)
                if(dp[dict[i][hi]][pos.fi][pos.se] > dp[dict[i][lo - 1]][pos.fi][pos.se] + dp[dict[lo][hi]][pos.fi][pos.se]){
                    int val = dp[dict[i][hi]][pos.fi][pos.se] = dp[dict[i][lo - 1]][pos.fi][pos.se] + dp[dict[lo][hi]][pos.fi][pos.se];
                    if(val < lim) q3[dp[dict[i][hi]][pos.fi][pos.se]].push({i, hi, pos.fi, pos.se});
                }
    
            for(int i = 0; i < dir; i++){
                pii nn = nxt[pos.fi][pos.se][i];
                if(dp[dict[lo][hi]][nn.fi][nn.se] > dp[dict[lo][hi]][pos.fi][pos.se] + 1){
                    int val = dp[dict[lo][hi]][nn.fi][nn.se] = dp[dict[lo][hi]][pos.fi][pos.se] + 1;
                    if(val < lim) q3[dp[dict[lo][hi]][nn.fi][nn.se]].push({lo, hi, nn.fi, nn.se});
                }
            }
        }
    }
    
    int ans = inf;
    for(int i = 1; i < h - 1; i++)
        for(int j = 1; j < w - 1; j++)
            ans = min(ans, dp[dict[0][n - 1]][i][j]);
    
    if(ans == inf) cout << - 1 << endl;
    else cout << ans << endl;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 85624 KB Output is correct
2 Correct 84 ms 85752 KB Output is correct
3 Correct 88 ms 85616 KB Output is correct
4 Correct 87 ms 86264 KB Output is correct
5 Correct 86 ms 86136 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 85624 KB Output is correct
2 Correct 84 ms 85752 KB Output is correct
3 Correct 88 ms 85616 KB Output is correct
4 Correct 87 ms 86264 KB Output is correct
5 Correct 86 ms 86136 KB Output is correct
6 Correct 80 ms 85660 KB Output is correct
7 Correct 79 ms 85500 KB Output is correct
8 Correct 79 ms 85624 KB Output is correct
9 Correct 81 ms 85576 KB Output is correct
10 Correct 79 ms 86136 KB Output is correct

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 85624 KB Output is correct
2 Correct 84 ms 85752 KB Output is correct
3 Correct 88 ms 85616 KB Output is correct
4 Correct 87 ms 86264 KB Output is correct
5 Correct 86 ms 86136 KB Output is correct
6 Correct 80 ms 85660 KB Output is correct
7 Correct 79 ms 85500 KB Output is correct
8 Correct 79 ms 85624 KB Output is correct
9 Correct 81 ms 85576 KB Output is correct
10 Correct 79 ms 86136 KB Output is correct
11 Correct 254 ms 110712 KB Output is correct
12 Correct 119 ms 106872 KB Output is correct
13 Correct 122 ms 109532 KB Output is correct
14 Incorrect 429 ms 114552 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 85624 KB Output is correct
2 Correct 84 ms 85752 KB Output is correct
3 Correct 88 ms 85616 KB Output is correct
4 Correct 87 ms 86264 KB Output is correct
5 Correct 86 ms 86136 KB Output is correct
6 Correct 80 ms 85660 KB Output is correct
7 Correct 79 ms 85500 KB Output is correct
8 Correct 79 ms 85624 KB Output is correct
9 Correct 81 ms 85576 KB Output is correct
10 Correct 79 ms 86136 KB Output is correct
11 Correct 254 ms 110712 KB Output is correct
12 Correct 119 ms 106872 KB Output is correct
13 Correct 122 ms 109532 KB Output is correct
14 Incorrect 429 ms 114552 KB Output isn't correct
15 Halted 0 ms 0 KB -