oj.uz

Submission #122409

# Submission time Handle Problem Language Result Execution time Memory
122409 2019-06-28T07:19:01 Z jakob_nogler Robots (APIO13_robots) C++14
60 / 100
 593 ms 163840 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 / 2;

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 85 ms 85624 KB Output is correct
2 Correct 85 ms 85496 KB Output is correct
3 Correct 87 ms 85496 KB Output is correct
4 Correct 89 ms 86136 KB Output is correct
5 Correct 95 ms 86280 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 85 ms 85624 KB Output is correct
2 Correct 85 ms 85496 KB Output is correct
3 Correct 87 ms 85496 KB Output is correct
4 Correct 89 ms 86136 KB Output is correct
5 Correct 95 ms 86280 KB Output is correct
6 Correct 79 ms 85624 KB Output is correct
7 Correct 83 ms 85496 KB Output is correct
8 Correct 79 ms 85752 KB Output is correct
9 Correct 85 ms 85624 KB Output is correct
10 Correct 92 ms 86136 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 85 ms 85624 KB Output is correct
2 Correct 85 ms 85496 KB Output is correct
3 Correct 87 ms 85496 KB Output is correct
4 Correct 89 ms 86136 KB Output is correct
5 Correct 95 ms 86280 KB Output is correct
6 Correct 79 ms 85624 KB Output is correct
7 Correct 83 ms 85496 KB Output is correct
8 Correct 79 ms 85752 KB Output is correct
9 Correct 85 ms 85624 KB Output is correct
10 Correct 92 ms 86136 KB Output is correct
11 Correct 304 ms 110652 KB Output is correct
12 Correct 119 ms 106844 KB Output is correct
13 Correct 119 ms 109600 KB Output is correct
14 Correct 593 ms 120388 KB Output is correct
15 Correct 201 ms 110208 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 85 ms 85624 KB Output is correct
2 Correct 85 ms 85496 KB Output is correct
3 Correct 87 ms 85496 KB Output is correct
4 Correct 89 ms 86136 KB Output is correct
5 Correct 95 ms 86280 KB Output is correct
6 Correct 79 ms 85624 KB Output is correct
7 Correct 83 ms 85496 KB Output is correct
8 Correct 79 ms 85752 KB Output is correct
9 Correct 85 ms 85624 KB Output is correct
10 Correct 92 ms 86136 KB Output is correct
11 Correct 304 ms 110652 KB Output is correct
12 Correct 119 ms 106844 KB Output is correct
13 Correct 119 ms 109600 KB Output is correct
14 Correct 593 ms 120388 KB Output is correct
15 Correct 201 ms 110208 KB Output is correct
16 Runtime error 267 ms 163840 KB Execution killed with signal 11 (could be triggered by violating memory limits)
17 Halted 0 ms 0 KB -