oj.uz

Submission #257292

# Submission time Handle Problem Language Result Execution time Memory
257292 2020-08-04T05:04:35 Z 문홍윤(#5062) None (JOI16_skating) C++17
78 / 100
 3000 ms 201040 KB 
#include <bits/stdc++.h>
#define eb emplace_back
#define mp make_pair
#define F first
#define S second
using namespace std;
typedef long long LL;
typedef pair<int, int> pii;
const LL llinf=2000000000000000000;

int n, m;
char str[1010][1010];
LL dist[1010][1010];

priority_queue<pair<LL, pii>, vector<pair<LL, pii> >, greater<pair<LL, pii> > > pq;
vector<pair<pii, LL> > link[1010][1010];
int mx[]={1, 0, -1, 0}, my[]={0, 1, 0, -1};

int main(){
    scanf("%d %d", &n, &m);
    for(int i=1; i<=n; i++)scanf("%s", str[i]+1);
    vector<pii> vc;
    for(int i=1; i<=n; i++){
        for(int j=1; j<=m; j++){
            if(str[i][j]=='#'){
                for(auto k:vc)link[k.F][k.S].eb(mp(i, j-1), 1ll);
                vc.clear();
            }
            else vc.eb(i, j);
        }
        for(int j=m; j>=1; j--){
            if(str[i][j]=='#'){
                for(auto k:vc)link[k.F][k.S].eb(mp(i, j+1), 1ll);
                vc.clear();
            }
            else vc.eb(i, j);
        }
    }
    for(int j=1; j<=m; j++){
        for(int i=1; i<=n; i++){
            if(str[i][j]=='#'){
                for(auto k:vc)link[k.F][k.S].eb(mp(i-1, j), 1ll);
                vc.clear();
            }
            else vc.eb(i, j);
        }
        for(int i=n; i>=1; i--){
            if(str[i][j]=='#'){
                for(auto k:vc)link[k.F][k.S].eb(mp(i+1, j), 1ll);
                vc.clear();
            }
            else vc.eb(i, j);
        }
    }
    for(int i=1; i<=n; i++){
        for(int j=1; j<=m; j++){
            dist[i][j]=llinf;
            if(str[i][j]=='#')continue;
            for(int k=0; k<4; k++){
                if(str[i+mx[k]][j+my[k]]=='.')link[i][j].eb(mp(i+mx[k], j+my[k]), 2ll);
            }
        }
    }
    int sx, sy, ex, ey;
    scanf("%d %d %d %d", &sx, &sy, &ex, &ey);
    pq.push(mp(0, mp(sx, sy)));
    while(!pq.empty()){
        LL d=pq.top().F;
        int x=pq.top().S.F, y=pq.top().S.S;
        pq.pop();
        if(dist[x][y]<=d)continue;
        dist[x][y]=d;
        for(auto i:link[x][y])pq.push(mp(d+i.S, i.F));
    }
    if(dist[ex][ey]==llinf)puts("-1");
    else printf("%lld", dist[ex][ey]);
}

/*
5 5
#####
#...#
#...#
#...#
#####
2 2
3 3
*/

Compilation message

skating.cpp: In function 'int main()':
skating.cpp:20:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~~
skating.cpp:21:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i=1; i<=n; i++)scanf("%s", str[i]+1);
                            ~~~~~^~~~~~~~~~~~~~~~
skating.cpp:65:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %d %d", &sx, &sy, &ex, &ey);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 24320 KB Output is correct
2 Correct 14 ms 24320 KB Output is correct
3 Correct 14 ms 24320 KB Output is correct
4 Correct 14 ms 24320 KB Output is correct
5 Correct 14 ms 24320 KB Output is correct
6 Correct 14 ms 24320 KB Output is correct
7 Correct 14 ms 24320 KB Output is correct
8 Correct 17 ms 24320 KB Output is correct
9 Correct 14 ms 24320 KB Output is correct
10 Correct 16 ms 24320 KB Output is correct

Subtask #2
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 24320 KB Output is correct
2 Correct 14 ms 24320 KB Output is correct
3 Correct 14 ms 24320 KB Output is correct
4 Correct 14 ms 24320 KB Output is correct
5 Correct 14 ms 24320 KB Output is correct
6 Correct 14 ms 24320 KB Output is correct
7 Correct 14 ms 24320 KB Output is correct
8 Correct 17 ms 24320 KB Output is correct
9 Correct 14 ms 24320 KB Output is correct
10 Correct 16 ms 24320 KB Output is correct
11 Correct 84 ms 31736 KB Output is correct
12 Correct 95 ms 32088 KB Output is correct
13 Correct 103 ms 32500 KB Output is correct
14 Correct 68 ms 30328 KB Output is correct
15 Correct 27 ms 28544 KB Output is correct
16 Correct 90 ms 32372 KB Output is correct
17 Correct 66 ms 30328 KB Output is correct
18 Correct 48 ms 29824 KB Output is correct
19 Correct 73 ms 30712 KB Output is correct
20 Correct 76 ms 31352 KB Output is correct
21 Correct 36 ms 29560 KB Output is correct
22 Correct 23 ms 27520 KB Output is correct
23 Correct 57 ms 29824 KB Output is correct
24 Correct 84 ms 31352 KB Output is correct
25 Correct 52 ms 29568 KB Output is correct
26 Correct 49 ms 29560 KB Output is correct

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 24320 KB Output is correct
2 Correct 14 ms 24320 KB Output is correct
3 Correct 14 ms 24320 KB Output is correct
4 Correct 14 ms 24320 KB Output is correct
5 Correct 14 ms 24320 KB Output is correct
6 Correct 14 ms 24320 KB Output is correct
7 Correct 14 ms 24320 KB Output is correct
8 Correct 17 ms 24320 KB Output is correct
9 Correct 14 ms 24320 KB Output is correct
10 Correct 16 ms 24320 KB Output is correct
11 Correct 84 ms 31736 KB Output is correct
12 Correct 95 ms 32088 KB Output is correct
13 Correct 103 ms 32500 KB Output is correct
14 Correct 68 ms 30328 KB Output is correct
15 Correct 27 ms 28544 KB Output is correct
16 Correct 90 ms 32372 KB Output is correct
17 Correct 66 ms 30328 KB Output is correct
18 Correct 48 ms 29824 KB Output is correct
19 Correct 73 ms 30712 KB Output is correct
20 Correct 76 ms 31352 KB Output is correct
21 Correct 36 ms 29560 KB Output is correct
22 Correct 23 ms 27520 KB Output is correct
23 Correct 57 ms 29824 KB Output is correct
24 Correct 84 ms 31352 KB Output is correct
25 Correct 52 ms 29568 KB Output is correct
26 Correct 49 ms 29560 KB Output is correct
27 Correct 2667 ms 188264 KB Output is correct
28 Correct 2975 ms 190492 KB Output is correct
29 Execution timed out 3109 ms 201040 KB Time limit exceeded
30 Halted 0 ms 0 KB -