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Submission #466366

# Submission time Handle Problem Language Result Execution time Memory
466366 2021-08-19T02:17:55 Z Namnamseo Sandwich (JOI16_sandwich) C++17
100 / 100
 4289 ms 18196 KB 
#include <bits/stdc++.h>
using namespace std;
const int inf = 1e9;
#define isinf asdf

char sand[410][410];
int n, m;

bool onstk[410][410];
bool vis[410][410];
int dpU[410][410];
int dpD[410][410];

int dx[4] = {0, -1, 0, 1};
int dy[4] = {1, 0, -1, 0};

/*
  1
2 x 0
  3
*/

bool isinf;

int dfs(int x, int y,int last_dir){
    onstk[x][y] = 1;
    vis[x][y] = 1;
    int ret = 1;
    int nxt_dir = 0;
    if(sand[x][y] == 'Z'){
        nxt_dir = 3-last_dir;
    } else { // N
        nxt_dir = last_dir^1;
    }
    int dirs[2] = {last_dir, nxt_dir};
    for(int d=0; d<2; ++d){
        int nx=x+dx[dirs[d]], ny=y+dy[dirs[d]];
        if(nx<1 || nx>n || ny<1 || ny>m) continue;
        if(!vis[nx][ny]) ret += dfs(nx, ny, dirs[d]);
        else if(onstk[nx][ny]) isinf=true;
    }
    onstk[x][y] = 0;
    return ret;
}

int main()
{
    scanf("%d%d",&n,&m);
    for(int i=1; i<=n; ++i) scanf("%s", sand[i]+1);

    for(int j=1; j<=m; ++j){
        memset(vis, 0, sizeof(vis));
        isinf = 0;
        for(int i=1; i<=n; ++i){
            int val = dfs(i, j, 1);
            if(isinf) dpU[i][j] = inf;
            else dpU[i][j] = dpU[i-1][j] + val;
        }
    }

    for(int j=1; j<=m; ++j){
        memset(vis, 0, sizeof(vis));
        isinf = 0;
        for(int i=n; i>=1; --i){
            int val = dfs(i, j, 3);
            if(isinf) dpD[i][j] = inf;
            else dpD[i][j] = dpD[i+1][j] + val;
        }
    }

    for(int i=1; i<=n; ++i){
        for(int j=1; j<=m; ++j){
            int v=min(dpU[i][j], dpD[i][j]);
            if(v == inf) v=-1;
            else v<<=1;
            printf("%d", v);
            if(j<m) putchar(' ');
        }
        putchar(10);
    }
    return 0;
}

Compilation message

sandwich.cpp: In function 'int main()':
sandwich.cpp:48:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |     scanf("%d%d",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~
sandwich.cpp:49:34: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |     for(int i=1; i<=n; ++i) scanf("%s", sand[i]+1);
      |                             ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 460 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 1 ms 588 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 1 ms 588 KB Output is correct
6 Correct 10 ms 820 KB Output is correct
7 Correct 5 ms 588 KB Output is correct
8 Correct 6 ms 680 KB Output is correct
9 Correct 3 ms 588 KB Output is correct
10 Correct 6 ms 588 KB Output is correct
11 Correct 7 ms 844 KB Output is correct
12 Correct 3 ms 716 KB Output is correct
13 Correct 5 ms 716 KB Output is correct
14 Correct 5 ms 716 KB Output is correct
15 Correct 4 ms 588 KB Output is correct
16 Correct 3 ms 588 KB Output is correct
17 Correct 3 ms 588 KB Output is correct
18 Correct 4 ms 588 KB Output is correct
19 Correct 4 ms 588 KB Output is correct
20 Correct 4 ms 588 KB Output is correct
21 Correct 4 ms 692 KB Output is correct
22 Correct 4 ms 588 KB Output is correct
23 Correct 4 ms 588 KB Output is correct
24 Correct 6 ms 704 KB Output is correct
25 Correct 6 ms 588 KB Output is correct
26 Correct 6 ms 588 KB Output is correct
27 Correct 7 ms 684 KB Output is correct
28 Correct 8 ms 588 KB Output is correct

Subtask #2
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 460 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 1 ms 588 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 1 ms 588 KB Output is correct
6 Correct 10 ms 820 KB Output is correct
7 Correct 5 ms 588 KB Output is correct
8 Correct 6 ms 680 KB Output is correct
9 Correct 3 ms 588 KB Output is correct
10 Correct 6 ms 588 KB Output is correct
11 Correct 7 ms 844 KB Output is correct
12 Correct 3 ms 716 KB Output is correct
13 Correct 5 ms 716 KB Output is correct
14 Correct 5 ms 716 KB Output is correct
15 Correct 4 ms 588 KB Output is correct
16 Correct 3 ms 588 KB Output is correct
17 Correct 3 ms 588 KB Output is correct
18 Correct 4 ms 588 KB Output is correct
19 Correct 4 ms 588 KB Output is correct
20 Correct 4 ms 588 KB Output is correct
21 Correct 4 ms 692 KB Output is correct
22 Correct 4 ms 588 KB Output is correct
23 Correct 4 ms 588 KB Output is correct
24 Correct 6 ms 704 KB Output is correct
25 Correct 6 ms 588 KB Output is correct
26 Correct 6 ms 588 KB Output is correct
27 Correct 7 ms 684 KB Output is correct
28 Correct 8 ms 588 KB Output is correct
29 Correct 10 ms 516 KB Output is correct
30 Correct 2 ms 1996 KB Output is correct
31 Correct 4289 ms 10492 KB Output is correct
32 Correct 4278 ms 10784 KB Output is correct
33 Correct 309 ms 4284 KB Output is correct
34 Correct 1300 ms 3156 KB Output is correct
35 Correct 1099 ms 2648 KB Output is correct
36 Correct 3 ms 1996 KB Output is correct
37 Correct 1641 ms 3184 KB Output is correct
38 Correct 1549 ms 3268 KB Output is correct
39 Correct 1551 ms 3048 KB Output is correct
40 Correct 2434 ms 18196 KB Output is correct
41 Correct 1454 ms 11608 KB Output is correct
42 Correct 1897 ms 4200 KB Output is correct
43 Correct 1841 ms 3924 KB Output is correct
44 Correct 1787 ms 3888 KB Output is correct
45 Correct 1207 ms 3224 KB Output is correct
46 Correct 846 ms 3160 KB Output is correct
47 Correct 962 ms 3180 KB Output is correct
48 Correct 535 ms 2800 KB Output is correct
49 Correct 826 ms 3148 KB Output is correct
50 Correct 987 ms 3176 KB Output is correct
51 Correct 885 ms 3144 KB Output is correct
52 Correct 905 ms 3152 KB Output is correct
53 Correct 844 ms 3152 KB Output is correct
54 Correct 815 ms 3016 KB Output is correct
55 Correct 902 ms 3148 KB Output is correct
56 Correct 894 ms 3108 KB Output is correct
57 Correct 620 ms 2964 KB Output is correct
58 Correct 2329 ms 3636 KB Output is correct
59 Correct 2419 ms 3568 KB Output is correct
60 Correct 1607 ms 3056 KB Output is correct
61 Correct 2193 ms 3460 KB Output is correct
62 Correct 2512 ms 3180 KB Output is correct
63 Correct 2778 ms 3308 KB Output is correct