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Submission #97490

# Submission time Handle Problem Language Result Execution time Memory
97490 2019-02-16T11:57:08 Z easrui None (JOI16_skating) C++14
78 / 100
 3000 ms 71056 KB 
#include <bits/stdc++.h>
#define va first
#define vb second
using namespace std;
const int MAX = 1005;
typedef pair<int,int> pii;
typedef pair<int,pii> ppi;
int R,C,sx,sy,ex,ey,cnt,dis[MAX][MAX],l[MAX][MAX],r[MAX][MAX],u[MAX][MAX],d[MAX][MAX];
bool init[MAX][MAX];
char c;
priority_queue<ppi> PQ;
int main()
{
    cin >> R >> C;
    for(int i=1; i<=R; i++){
        for(int j=1; j<=C; j++){
            cin >> c;
            if(c=='.') init[i][j] = 1;
            dis[i][j] = 1e6;
        }
    }
    cin >> sy >> sx >> ey >> ex;
    for(int i=1; i<=R; i++){
        for(int j=1; j<=C; j++){
            if(init[i][j]) l[i][j] = cnt;
            else cnt = j;
        }
        for(int j=C; j>=1; j--){
            if(init[i][j]) r[i][j] = cnt;
            else cnt = j;
        }
    }
    for(int j=1; j<=C; j++){
        for(int i=1; i<=R; i++){
            if(init[i][j]) u[i][j] = cnt;
            else cnt = i;
        }
        for(int i=R; i>=1; i--){
            if(init[i][j]) d[i][j] = cnt;
            else cnt = i;
        }
    }
    dis[sy][sx] = 0;
    int D,y,x,v1,v2;
    PQ.push(ppi(0,pii(sy,sx)));
    while(!PQ.empty()){
        D = -PQ.top().va;
        y = PQ.top().vb.va;
        x = PQ.top().vb.vb;
        PQ.pop();
        if(D>dis[y][x]) continue;
        v1 = l[y][x]+1;
        v2 = x-1;
        cnt = 1;
        while(v1<=v2){
            if(cnt%2){
                if(dis[y][v1]>D+cnt){
                    dis[y][v1] = D+cnt;
                    PQ.push(ppi(-D-cnt,pii(y,v1)));
                }
                v1++;
            }
            else{
                if(dis[y][v2]>D+cnt){
                    dis[y][v2] = D+cnt;
                    PQ.push(ppi(-D-cnt,pii(y,v2)));
                }
                v2--;
            }
            cnt++;
        }
        v1 = x+1;
        v2 = r[y][x]-1;
        cnt = 1;
        while(v1<=v2){
            if(cnt%2){
                if(dis[y][v2]>D+cnt){
                    dis[y][v2] = D+cnt;
                    PQ.push(ppi(-D-cnt,pii(y,v2)));
                }
                v2--;
            }
            else{
                if(dis[y][v1]>D+cnt){
                    dis[y][v1] = D+cnt;
                    PQ.push(ppi(-D-cnt,pii(y,v1)));
                }
                v1++;
            }
            cnt++;
        }
        v1 = u[y][x]+1;
        v2 = y-1;
        cnt = 1;
        while(v1<=v2){
            if(cnt%2){
                if(dis[v1][x]>D+cnt){
                    dis[v1][x] = D+cnt;
                    PQ.push(ppi(-D-cnt,pii(v1,x)));
                }
                v1++;
            }
            else{
                if(dis[v2][x]>D+cnt){
                    dis[v2][x] = D+cnt;
                    PQ.push(ppi(-D-cnt,pii(v2,x)));
                }
                v2--;
            }
            cnt++;
        }
        v1 = y+1;
        v2 = d[y][x]-1;
        cnt = 1;
        while(v1<=v2){
            if(cnt%2){
                if(dis[v2][x]>D+cnt){
                    dis[v2][x] = D+cnt;
                    PQ.push(ppi(-D-cnt,pii(v2,x)));
                }
                v2--;
            }
            else{
                if(dis[v1][x]>D+cnt){
                    dis[v1][x] = D+cnt;
                    PQ.push(ppi(-D-cnt,pii(v1,x)));
                }
                v1++;
            }
            cnt++;
        }
    }
    if(dis[ey][ex]==1e6) cout << -1;
    else cout << dis[ey][ex];
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 512 KB Output is correct
2 Correct 2 ms 512 KB Output is correct
3 Correct 2 ms 512 KB Output is correct
4 Correct 2 ms 512 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 2 ms 512 KB Output is correct
7 Correct 3 ms 512 KB Output is correct
8 Correct 3 ms 512 KB Output is correct
9 Correct 2 ms 512 KB Output is correct
10 Correct 3 ms 512 KB Output is correct

Subtask #2
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 512 KB Output is correct
2 Correct 2 ms 512 KB Output is correct
3 Correct 2 ms 512 KB Output is correct
4 Correct 2 ms 512 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 2 ms 512 KB Output is correct
7 Correct 3 ms 512 KB Output is correct
8 Correct 3 ms 512 KB Output is correct
9 Correct 2 ms 512 KB Output is correct
10 Correct 3 ms 512 KB Output is correct
11 Correct 88 ms 5372 KB Output is correct
12 Correct 73 ms 6136 KB Output is correct
13 Correct 55 ms 6092 KB Output is correct
14 Correct 20 ms 4608 KB Output is correct
15 Correct 10 ms 4480 KB Output is correct
16 Correct 41 ms 5372 KB Output is correct
17 Correct 22 ms 4480 KB Output is correct
18 Correct 17 ms 4480 KB Output is correct
19 Correct 20 ms 4608 KB Output is correct
20 Correct 44 ms 4800 KB Output is correct
21 Correct 11 ms 4480 KB Output is correct
22 Correct 18 ms 4480 KB Output is correct
23 Correct 18 ms 4480 KB Output is correct
24 Correct 31 ms 5048 KB Output is correct
25 Correct 13 ms 4480 KB Output is correct
26 Correct 13 ms 4480 KB Output is correct

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 512 KB Output is correct
2 Correct 2 ms 512 KB Output is correct
3 Correct 2 ms 512 KB Output is correct
4 Correct 2 ms 512 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 2 ms 512 KB Output is correct
7 Correct 3 ms 512 KB Output is correct
8 Correct 3 ms 512 KB Output is correct
9 Correct 2 ms 512 KB Output is correct
10 Correct 3 ms 512 KB Output is correct
11 Correct 88 ms 5372 KB Output is correct
12 Correct 73 ms 6136 KB Output is correct
13 Correct 55 ms 6092 KB Output is correct
14 Correct 20 ms 4608 KB Output is correct
15 Correct 10 ms 4480 KB Output is correct
16 Correct 41 ms 5372 KB Output is correct
17 Correct 22 ms 4480 KB Output is correct
18 Correct 17 ms 4480 KB Output is correct
19 Correct 20 ms 4608 KB Output is correct
20 Correct 44 ms 4800 KB Output is correct
21 Correct 11 ms 4480 KB Output is correct
22 Correct 18 ms 4480 KB Output is correct
23 Correct 18 ms 4480 KB Output is correct
24 Correct 31 ms 5048 KB Output is correct
25 Correct 13 ms 4480 KB Output is correct
26 Correct 13 ms 4480 KB Output is correct
27 Execution timed out 3034 ms 71056 KB Time limit exceeded
28 Halted 0 ms 0 KB -