oj.uz

Submission #436918

# Submission time Handle Problem Language Result Execution time Memory
436918 2021-06-25T09:11:48 Z qwerasdfzxcl Sandwich (JOI16_sandwich) C++14
35 / 100
 343 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) vector<pair<short, short>>().swap(col[nx1][nx2][c]);
    }
    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) vector<pair<short, short>>().swap(col[nx3][nx4][0]);
        }
        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) vector<pair<short, short>>().swap(col[nx3][nx4][0]);
        }
        else{
            ret &= dfs(nx3, nx4, 1);
            tmp2 = col[nx3][nx4][1];
            deg[nx3][nx4][1]++;
            if (deg[nx3][nx4][1]==2) vector<pair<short, short>>().swap(col[nx3][nx4][1]);
        }
    }
    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:93:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   93 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
sandwich.cpp:95:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   95 |         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 7 ms 7884 KB Output is correct
3 Correct 7 ms 8420 KB Output is correct
4 Correct 8 ms 7884 KB Output is correct
5 Correct 8 ms 8524 KB Output is correct
6 Correct 10 ms 10572 KB Output is correct
7 Correct 12 ms 8564 KB Output is correct
8 Correct 10 ms 8572 KB Output is correct
9 Correct 10 ms 8460 KB Output is correct
10 Correct 10 ms 8516 KB Output is correct
11 Correct 11 ms 8652 KB Output is correct
12 Correct 8 ms 8380 KB Output is correct
13 Correct 11 ms 8744 KB Output is correct
14 Correct 10 ms 8908 KB Output is correct
15 Correct 10 ms 8556 KB Output is correct
16 Correct 11 ms 8524 KB Output is correct
17 Correct 11 ms 8524 KB Output is correct
18 Correct 12 ms 8524 KB Output is correct
19 Correct 10 ms 8524 KB Output is correct
20 Correct 10 ms 8524 KB Output is correct
21 Correct 10 ms 8524 KB Output is correct
22 Correct 10 ms 8524 KB Output is correct
23 Correct 11 ms 8480 KB Output is correct
24 Correct 11 ms 8700 KB Output is correct
25 Correct 11 ms 8780 KB Output is correct
26 Correct 11 ms 8860 KB Output is correct
27 Correct 10 ms 8484 KB Output is correct
28 Correct 10 ms 8524 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 7 ms 7884 KB Output is correct
3 Correct 7 ms 8420 KB Output is correct
4 Correct 8 ms 7884 KB Output is correct
5 Correct 8 ms 8524 KB Output is correct
6 Correct 10 ms 10572 KB Output is correct
7 Correct 12 ms 8564 KB Output is correct
8 Correct 10 ms 8572 KB Output is correct
9 Correct 10 ms 8460 KB Output is correct
10 Correct 10 ms 8516 KB Output is correct
11 Correct 11 ms 8652 KB Output is correct
12 Correct 8 ms 8380 KB Output is correct
13 Correct 11 ms 8744 KB Output is correct
14 Correct 10 ms 8908 KB Output is correct
15 Correct 10 ms 8556 KB Output is correct
16 Correct 11 ms 8524 KB Output is correct
17 Correct 11 ms 8524 KB Output is correct
18 Correct 12 ms 8524 KB Output is correct
19 Correct 10 ms 8524 KB Output is correct
20 Correct 10 ms 8524 KB Output is correct
21 Correct 10 ms 8524 KB Output is correct
22 Correct 10 ms 8524 KB Output is correct
23 Correct 11 ms 8480 KB Output is correct
24 Correct 11 ms 8700 KB Output is correct
25 Correct 11 ms 8780 KB Output is correct
26 Correct 11 ms 8860 KB Output is correct
27 Correct 10 ms 8484 KB Output is correct
28 Correct 10 ms 8524 KB Output is correct
29 Correct 7 ms 7964 KB Output is correct
30 Correct 15 ms 13168 KB Output is correct
31 Runtime error 343 ms 262144 KB Execution killed with signal 9
32 Halted 0 ms 0 KB -