oj.uz

Submission #436919

# Submission time Handle Problem Language Result Execution time Memory
436919 2021-06-25T09:14:11 Z qwerasdfzxcl Sandwich (JOI16_sandwich) C++14
35 / 100
 290 ms 262144 KB 
#include <bits/stdc++.h>

typedef long long ll;
using namespace std;
char matrix[404][404];
int visited[404][404][2];
int dp[404][404][2], dx[4] = {-1, 1, 0, 0}, dy[4] = {0, 0, 1, -1}, n, m, deg[404][404][2];
vector<pair<short, short>> col[404][404][2];

bool valid(int x, int y){
    return ((1<=x && x<=n) && (1<=y && y<=m));
}
/*
int count_visited(){
    int ret = 0;
    for (int i=1;i<=n;i++){
        for (int j=1;j<=m;j++) if (visited[i][j][0] || visited[i][j][1]) ret++;
    }
    return ret;
}*/

vector<pair<short, short>> combine(vector<pair<short, short>> &X, vector<pair<short, short>> &Y){
    vector<pair<short, short>> ret(n+1);
    for (int i=1;i<=n;i++){
        if (X[i].first==m || Y[i].first==m) ret[i].first = ret[i].second = m;
        else{
            ret[i].first = max(X[i].first, Y[i].first);
            ret[i].second = max(X[i].second, Y[i].second);
            if (ret[i].first+ret[i].second>=m) ret[i].first = ret[i].second = m;
        }
    }
    return ret;
}

int calc(int x, int y, int c){
    int ret = 0;
    for (int i=1;i<=n;i++){
        if (col[x][y][c][i].first==m) ret += m;
        else ret += col[x][y][c][i].first+col[x][y][c][i].second;
    }
    return ret;
}

bool dfs(int x, int y, int c){
    if (visited[x][y][c]) return (visited[x][y][c]==1e9 && dp[x][y][c]!=1e9);
    visited[x][y][c] = c+1;

    bool ret = 1;
    vector<pair<short, short>> tmp1(n+1), tmp2(n+1);
    int nx1 = x+dx[c], nx2 = y+dy[c];
    if (valid(nx1, nx2)){
        ret &= dfs(nx1, nx2, c);
        tmp1 = col[nx1][nx2][c];
        deg[nx1][nx2][c]++;
        if (deg[nx1][nx2][c]==2){
            col[nx1][nx2][c].clear();
            col[nx1][nx2][c].shrink_to_fit();
        }
    }
    int d = 2;
    if (!c && matrix[x][y]=='Z') d = 3;
    if (c && matrix[x][y]=='N') d = 3;
    int nx3 = x+dx[d], nx4 = y+dy[d];
    if (valid(nx3, nx4)){
        if (d==2 && matrix[nx3][nx4]=='N'){
            ret &= dfs(nx3, nx4, 0);
            tmp2 = col[nx3][nx4][0];
            deg[nx3][nx4][0]++;
            if (deg[nx3][nx4][0]==2){
                col[nx3][nx4][0].clear();
                col[nx3][nx4][0].shrink_to_fit();
            }
        }
        else if (d==3 && matrix[nx3][nx4]=='Z'){
             ret &= dfs(nx3, nx4, 0);
             tmp2 = col[nx3][nx4][0];
             deg[nx3][nx4][0]++;
            if (deg[nx3][nx4][0]==2){
                col[nx3][nx4][0].clear();
                col[nx3][nx4][0].shrink_to_fit();
            }
        }
        else{
            ret &= dfs(nx3, nx4, 1);
            tmp2 = col[nx3][nx4][1];
            deg[nx3][nx4][1]++;
            if (deg[nx3][nx4][1]==2){
                col[nx3][nx4][1].clear();
                col[nx3][nx4][1].shrink_to_fit();
            }
        }
    }
    visited[x][y][c] = 1e9;
    if (ret){
        col[x][y][c] = combine(tmp1, tmp2);
        if (d==2) col[x][y][c][x].second = m+1-y;
        else col[x][y][c][x].first = y;
        if (col[x][y][c][x].first+col[x][y][c][x].second==m) col[x][y][c][x].first = col[x][y][c][x].second = m;
        dp[x][y][c] = calc(x, y, c);
    }
    return ret;
}

int main(){
    scanf("%d %d", &n, &m);
    for (int i=1;i<=n;i++){
        scanf("%s", matrix[i]+1);
        for (int j=1;j<=m;j++) dp[i][j][0] = dp[i][j][1] = 1e9;
    }
    vector<pair<short, short>> v;
    for (int i=1;i<=n;i++){
        for (int j=1;j<=m;j++) v.emplace_back(i, j);
    }
    random_shuffle(v.begin(), v.end());
    for (auto &p:v){
        for (int k=0;k<2;k++) if (!visited[p.first][p.second][k]) dfs(p.first, p.second, k);
    }
    /*for (int i=1;i<=n;i++){
        for (int j=1;j<=m;j++){
            for (int k=0;k<2;k++) if (!visited[i][j][k]) dfs(i, j, k);
        }
    }*/
    for (int i=1;i<=n;i++){
        for (int j=1;j<=m;j++){
            int ans = min(dp[i][j][0], dp[i][j][1]);
            if (ans==1e9) ans = -1;
            else ans <<= 1;
            printf("%d ", ans);
        }
        printf("\n");
    }
    return 0;
}

Compilation message

sandwich.cpp: In function 'int main()':
sandwich.cpp:105:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  105 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
sandwich.cpp:107:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  107 |         scanf("%s", matrix[i]+1);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 7884 KB Output is correct
2 Correct 6 ms 7992 KB Output is correct
3 Correct 6 ms 8500 KB Output is correct
4 Correct 6 ms 7884 KB Output is correct
5 Correct 6 ms 8524 KB Output is correct
6 Correct 10 ms 10560 KB Output is correct
7 Correct 10 ms 8560 KB Output is correct
8 Correct 10 ms 8576 KB Output is correct
9 Correct 11 ms 8396 KB Output is correct
10 Correct 11 ms 8544 KB Output is correct
11 Correct 11 ms 8640 KB Output is correct
12 Correct 9 ms 8408 KB Output is correct
13 Correct 11 ms 8792 KB Output is correct
14 Correct 11 ms 8908 KB Output is correct
15 Correct 11 ms 8524 KB Output is correct
16 Correct 10 ms 8552 KB Output is correct
17 Correct 12 ms 8552 KB Output is correct
18 Correct 10 ms 8524 KB Output is correct
19 Correct 11 ms 8524 KB Output is correct
20 Correct 9 ms 8524 KB Output is correct
21 Correct 9 ms 8476 KB Output is correct
22 Correct 9 ms 8524 KB Output is correct
23 Correct 9 ms 8560 KB Output is correct
24 Correct 11 ms 8652 KB Output is correct
25 Correct 10 ms 8652 KB Output is correct
26 Correct 10 ms 8856 KB Output is correct
27 Correct 10 ms 8524 KB Output is correct
28 Correct 11 ms 8480 KB Output is correct

Subtask #2
0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 7884 KB Output is correct
2 Correct 6 ms 7992 KB Output is correct
3 Correct 6 ms 8500 KB Output is correct
4 Correct 6 ms 7884 KB Output is correct
5 Correct 6 ms 8524 KB Output is correct
6 Correct 10 ms 10560 KB Output is correct
7 Correct 10 ms 8560 KB Output is correct
8 Correct 10 ms 8576 KB Output is correct
9 Correct 11 ms 8396 KB Output is correct
10 Correct 11 ms 8544 KB Output is correct
11 Correct 11 ms 8640 KB Output is correct
12 Correct 9 ms 8408 KB Output is correct
13 Correct 11 ms 8792 KB Output is correct
14 Correct 11 ms 8908 KB Output is correct
15 Correct 11 ms 8524 KB Output is correct
16 Correct 10 ms 8552 KB Output is correct
17 Correct 12 ms 8552 KB Output is correct
18 Correct 10 ms 8524 KB Output is correct
19 Correct 11 ms 8524 KB Output is correct
20 Correct 9 ms 8524 KB Output is correct
21 Correct 9 ms 8476 KB Output is correct
22 Correct 9 ms 8524 KB Output is correct
23 Correct 9 ms 8560 KB Output is correct
24 Correct 11 ms 8652 KB Output is correct
25 Correct 10 ms 8652 KB Output is correct
26 Correct 10 ms 8856 KB Output is correct
27 Correct 10 ms 8524 KB Output is correct
28 Correct 11 ms 8480 KB Output is correct
29 Correct 6 ms 8012 KB Output is correct
30 Correct 12 ms 13260 KB Output is correct
31 Runtime error 290 ms 262144 KB Execution killed with signal 9
32 Halted 0 ms 0 KB -