oj.uz

Submission #155706

# Submission time Handle Problem Language Result Execution time Memory
155706 2019-09-30T01:29:49 Z arnold518 Robots (APIO13_robots) C++14
30 / 100
 1500 ms 44960 KB 
#include <bits/stdc++.h>
using namespace std;

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

const int MAXN = 500;
const int INF = 987654321;

const int dy[]={-1, 1, 0, 0};
const int dx[]={0, 0, -1, 1};
const int dA[]={2, 3, 1, 0};
const int dC[]={3, 2, 0, 1};

int N, W, H;
char A[MAXN+10][MAXN+10];
pii dest[MAXN+10][MAXN+10][4];
int dp[MAXN+10][MAXN+10][10][10];

void dfs(int y, int x, int dir)
{
    if(dest[y][x][dir]!=pii(-1, -1)) return;
    int ndir;
    if(A[y][x]=='A') ndir=dA[dir];
    else if(A[y][x]=='C') ndir=dC[dir];
    else ndir=dir;

    int ny=y+dy[ndir], nx=x+dx[ndir];
    if(A[ny][nx]=='x')
    {
        dest[y][x][dir]={y, x};
        return;
    }
    dfs(ny, nx, ndir);
    dest[y][x][dir]=dest[ny][nx][ndir];
}

struct Queue
{
    int y, x, w;
    bool operator < (const Queue &p) const { return w>p.w; }
};

int main()
{
    int i, j, k, p, q;

    scanf("%d%d%d", &N, &W, &H);
    for(i=1; i<=H; i++) scanf("%s", A[i]+1);
    for(i=0; i<=H+1; i++) A[i][0]=A[i][W+1]='x';
    for(j=0; j<=W+1; j++) A[0][j]=A[H+1][j]='x';

    for(i=1; i<=H; i++) for(j=1; j<=W; j++) for(k=0; k<4; k++) dest[i][j][k]={-1, -1};
    for(i=1; i<=H; i++) for(j=1; j<=W; j++) for(k=0; k<4; k++)
    {
        if(dest[i][j][k]!=pii(-1, -1)) continue;
        dfs(i, j, k);
    }
    //for(i=1; i<=H; i++) { for(j=1; j<=W; j++) printf("(%d %d / %d %d / %d %d / %d %d) ", dest[i][j][0].first, dest[i][j][0].second, dest[i][j][1].first, dest[i][j][1].second, dest[i][j][2].first, dest[i][j][2].second, dest[i][j][3].first, dest[i][j][3].second); printf("\n"); }

    for(q=1; q<=N; q++) for(p=q; p>=1; p--)
    {
        priority_queue<Queue> PQ;
        for(i=1; i<=H; i++) for(j=1; j<=W; j++) dp[i][j][p][q]=INF;
        if(p==q)
        {
            for(i=1; i<=H; i++) for(j=1; j<=W; j++)
            {
                int now;
                if(A[i][j]=='0'+p) now=0;
                else now=INF;
                PQ.push({i, j, now});
            }
        }
        else
        {
            for(i=1; i<=H; i++) for(j=1; j<=W; j++)
            {
                int now=INF;
                for(k=p; k<q; k++)
                {
                    now=min(now, dp[i][j][p][k]+dp[i][j][k+1][q]);
                }
                PQ.push({i, j, now});
            }
        }
        while(!PQ.empty())
        {
            Queue T=PQ.top(); PQ.pop();
            //printf("!%d %d %d\n", T.x, T.y, T.w);
            if(dp[T.y][T.x][p][q]<=T.w) continue;
            dp[T.y][T.x][p][q]=T.w;
            // if(dp[dest[T.y][T.x][k].first][dest[T.y][T.x][k].second][p][q]>T.w+1)
            for(k=0; k<4; k++) PQ.push({dest[T.y][T.x][k].first, dest[T.y][T.x][k].second, T.w+1}); //printf("?%d %d %d\n", dest[T.y][T.x][k].first, dest[T.y][T.x][k].second, T.w+1);
        }
        //printf("=======%d %d========\n", p, q);
        //for(i=1; i<=H; i++) { for(j=1; j<=W; j++) printf("%d ", dp[i][j][p][q]); printf("\n"); }
    }
    int ans=INF;
    for(i=1; i<=H; i++) for(j=1; j<=W; j++) ans=min(ans, dp[i][j][1][N]);
    if(ans==INF) printf("-1");
    else printf("%d", ans);
}

Compilation message

robots.cpp: In function 'int main()':
robots.cpp:49:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d", &N, &W, &H);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~
robots.cpp:50:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(i=1; i<=H; i++) scanf("%s", A[i]+1);
                         ~~~~~^~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 380 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 504 KB Output is correct

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 380 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 953 ms 44960 KB Output is correct
12 Correct 55 ms 41836 KB Output is correct
13 Correct 330 ms 43912 KB Output is correct
14 Execution timed out 1574 ms 43016 KB Time limit exceeded
15 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 380 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 953 ms 44960 KB Output is correct
12 Correct 55 ms 41836 KB Output is correct
13 Correct 330 ms 43912 KB Output is correct
14 Execution timed out 1574 ms 43016 KB Time limit exceeded
15 Halted 0 ms 0 KB -