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Submission #126164

# Submission time Handle Problem Language Result Execution time Memory
126164 2019-07-07T07:02:19 Z choikiwon Sandwich (JOI16_sandwich) C++17
35 / 100
 8000 ms 30292 KB 
#include<bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;

const int MN = 444;

int N, M;
char G[MN][MN];
vector<int> adj[MN * MN * 2];

int f(int r, int c, int up) {
    return 2 * (r * M + c) + up;
}

int tin[MN * MN * 2], tout[MN * MN * 2], timer, cnt;
int ans[MN * MN * 2];

void dfs(int u) {
    tin[u] = timer++;
    cnt++;

    for(int i = 0; i < adj[u].size(); i++) {
        int v = adj[u][i];

        if(tin[v] != -1) {
            if(tin[v] < tin[u] && tout[v] == -1) cnt = 1e9;
            continue;
        }
        dfs(v);
    }

    tout[u] = timer;
}

int main() {
    scanf("%d %d", &N, &M);

    for(int i = 0; i < N; i++) {
        scanf("\n");
        for(int j = 0; j < M; j++) {
            scanf("%c", &G[i][j]);
        }
    }

    for(int i = 0; i < N; i++) {
        for(int j = 0; j < M; j++) {
            if(G[i][j] == 'N') {
                if(i) adj[ f(i, j, 1) ].push_back(f(i - 1, j, 1));
                if(j < M - 1) adj[ f(i, j, 1) ].push_back(f(i, j + 1, G[i][j + 1] == 'N'));
                if(i < N - 1) adj[ f(i, j, 0) ].push_back(f(i + 1, j, 0));
                if(j) adj[ f(i, j, 0) ].push_back(f(i, j - 1, G[i][j - 1] == 'Z'));
            }
            if(G[i][j] == 'Z') {
                if(i) adj[ f(i, j, 1) ].push_back(f(i - 1, j, 1));
                if(j) adj[ f(i, j, 1) ].push_back(f(i, j - 1, G[i][j - 1] == 'Z'));
                if(i < N - 1) adj[ f(i, j, 0) ].push_back(f(i + 1, j, 0));
                if(j < M - 1) adj[ f(i, j, 0) ].push_back(f(i, j + 1, G[i][j + 1] == 'N'));
            }
        }
    }

    for(int i = 0; i < M; i++) {
        memset(tin, -1, sizeof(tin));
        memset(tout, -1, sizeof(tout));
        timer = 0;
        cnt = 0;

        for(int j = 0; j < N; j++) {
            if(tin[ f(j, i, 1) ] == -1) dfs(f(j, i, 1));
            ans[ f(j, i, 1) ] = cnt;
        }
        memset(tin, -1, sizeof(tin));
        memset(tout, -1, sizeof(tout));
        timer = 0;
        cnt = 0;

        for(int j = N - 1; j >= 0; j--) {
            if(tin[ f(j, i, 0) ] == -1) dfs(f(j, i, 0));
            ans[ f(j, i, 0) ] = cnt;
        }
    }

    for(int i = 0; i < N; i++) {
        for(int j = 0; j < M; j++) {
            if(min(ans[ f(i, j, 0) ], ans[ f(i, j, 1) ]) >= 1e9) printf("-1 ");
            else printf("%d ", 2 * min(ans[ f(i, j, 0) ], ans[ f(i, j, 1) ]));
        }
        printf("\n");
    }
}

Compilation message

sandwich.cpp: In function 'void dfs(int)':
sandwich.cpp:24:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < adj[u].size(); i++) {
                    ~~^~~~~~~~~~~~~~~
sandwich.cpp: In function 'int main()':
sandwich.cpp:38:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &N, &M);
     ~~~~~^~~~~~~~~~~~~~~~~
sandwich.cpp:41:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("\n");
         ~~~~~^~~~~~
sandwich.cpp:43:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%c", &G[i][j]);
             ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 12664 KB Output is correct
2 Correct 28 ms 12664 KB Output is correct
3 Correct 13 ms 12664 KB Output is correct
4 Correct 14 ms 12664 KB Output is correct
5 Correct 13 ms 12664 KB Output is correct
6 Correct 45 ms 13048 KB Output is correct
7 Correct 36 ms 12924 KB Output is correct
8 Correct 37 ms 12920 KB Output is correct
9 Correct 30 ms 12792 KB Output is correct
10 Correct 38 ms 12924 KB Output is correct
11 Correct 41 ms 12920 KB Output is correct
12 Correct 32 ms 12792 KB Output is correct
13 Correct 41 ms 12920 KB Output is correct
14 Correct 40 ms 12936 KB Output is correct
15 Correct 33 ms 12920 KB Output is correct
16 Correct 35 ms 12920 KB Output is correct
17 Correct 33 ms 12920 KB Output is correct
18 Correct 33 ms 12920 KB Output is correct
19 Correct 33 ms 12920 KB Output is correct
20 Correct 33 ms 12920 KB Output is correct
21 Correct 34 ms 12920 KB Output is correct
22 Correct 38 ms 12920 KB Output is correct
23 Correct 34 ms 12920 KB Output is correct
24 Correct 39 ms 12920 KB Output is correct
25 Correct 44 ms 12920 KB Output is correct
26 Correct 43 ms 12920 KB Output is correct
27 Correct 39 ms 12892 KB Output is correct
28 Correct 35 ms 12920 KB Output is correct

Subtask #2
0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 12664 KB Output is correct
2 Correct 28 ms 12664 KB Output is correct
3 Correct 13 ms 12664 KB Output is correct
4 Correct 14 ms 12664 KB Output is correct
5 Correct 13 ms 12664 KB Output is correct
6 Correct 45 ms 13048 KB Output is correct
7 Correct 36 ms 12924 KB Output is correct
8 Correct 37 ms 12920 KB Output is correct
9 Correct 30 ms 12792 KB Output is correct
10 Correct 38 ms 12924 KB Output is correct
11 Correct 41 ms 12920 KB Output is correct
12 Correct 32 ms 12792 KB Output is correct
13 Correct 41 ms 12920 KB Output is correct
14 Correct 40 ms 12936 KB Output is correct
15 Correct 33 ms 12920 KB Output is correct
16 Correct 35 ms 12920 KB Output is correct
17 Correct 33 ms 12920 KB Output is correct
18 Correct 33 ms 12920 KB Output is correct
19 Correct 33 ms 12920 KB Output is correct
20 Correct 33 ms 12920 KB Output is correct
21 Correct 34 ms 12920 KB Output is correct
22 Correct 38 ms 12920 KB Output is correct
23 Correct 34 ms 12920 KB Output is correct
24 Correct 39 ms 12920 KB Output is correct
25 Correct 44 ms 12920 KB Output is correct
26 Correct 43 ms 12920 KB Output is correct
27 Correct 39 ms 12892 KB Output is correct
28 Correct 35 ms 12920 KB Output is correct
29 Correct 140 ms 12752 KB Output is correct
30 Correct 13 ms 12920 KB Output is correct
31 Execution timed out 8058 ms 30292 KB Time limit exceeded
32 Halted 0 ms 0 KB -