結果

問題 No.1323 うしらずSwap
ユーザー tails
提出日時 2020-12-20 13:43:54
言語 C
(gcc 13.3.0)
結果
AC  
実行時間 405 ms / 3,000 ms
コード長 1,979 bytes
コンパイル時間 534 ms
コンパイル使用メモリ 32,128 KB
実行使用メモリ 272,512 KB
最終ジャッジ日時 2024-11-15 09:39:30
合計ジャッジ時間 9,589 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge2
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 59
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.c:112:1: warning: return type defaults to 'int' [-Wimplicit-int]
  112 | main(){
      | ^~~~
main.c: In function 'main':
main.c:113:9: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
  113 |         scanf("%d%d%d%d%d%d",&h,&w,&ra,&ca,&rb,&cb);
      |         ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | int h,w,ra,ca,rb,cb;
main.c:113:9: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
  113 |         scanf("%d%d%d%d%d%d",&h,&w,&ra,&ca,&rb,&cb);
      |         ^~~~~
main.c:113:9: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:121:17: warning: implicit declaration of function 'puts' [-Wimplicit-function-declaration]
  121 |                 puts("-1");
      |                 ^~~~
main.c:121:17: note: include '<stdio.h>' or provide a declaration of 'puts'
main.c:122:17: warning: implicit declaration of function 'exit' [-Wimplicit-function-declaration]
  122 |                 exit(0);
      |                 ^~~~
main.c:1:1: note: include '<stdlib.h>' or provide a declaration of 'exit'
  +++ |+#include <stdlib.h>
    1 | int h,w,ra,ca,rb,cb;
main.c:122:17: warning: incompatible implicit declaration of built-in function 'exit' [-Wbuiltin-declaration-mismatch]
  122 |                 exit(0);
      |                 ^~~~
main.c:122:17: note: include '<stdlib.h>' or provide a declaration of 'exit'
main.c:137:17: warning: incompatible implicit declaration of built-in function 'exit' [-Wbuiltin-declaration-mismatch]
  137 |                 exit(0);
      |                 ^~~~
main.c:137:17: note: include '<stdlib.h>' or provide a declaration of 'exit'
main.c:139:9: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
  139 |         printf("%d",d1+d2);
      |         ^~~~~~
main.c:139:9: note: include '<stdio.h>' or provide a declaration of 'printf'
mai

ソースコード

diff #
プレゼンテーションモードにする

int h,w,ra,ca,rb,cb;
char s[1333][1335];
int dp1[1333][1333];
int dp2[1333][1333][2];
struct{int y,x,z,d;} q[16000000];
int qr,qw;
void enq(int y,int x,int z,int d){
    q[qw].y=y;
    q[qw].x=x;
    q[qw].z=z;
    q[qw].d=d;
    ++qw;
}
void f1(){
    qr=qw=0;
    enq(ra,ca,0,1);
    while(qr<qw){
        int y=q[qr].y;
        int x=q[qr].x;
        int d=q[qr].d;
        ++qr;
        if(s[y][x]=='.'&&dp1[y][x]==0){
            dp1[y][x]=d;
            enq(y-1,x,0,d+1);
            enq(y+1,x,0,d+1);
            enq(y,x-1,0,d+1);
            enq(y,x+1,0,d+1);
        }
    }
}
void f2(int y,int x){
    int d=dp1[y][x];
    while(1){
        dp1[y][x]=-1;
        --d;
        if(d==0){
            return;
        }else if(dp1[y-1][x]==d){
            y=y-1;
        }else if(dp1[y+1][x]==d){
            y=y+1;
        }else if(dp1[y][x-1]==d){
            x=x-1;
        }else if(dp1[y][x+1]==d){
            x=x+1;
        }
    }
}
void f3(){
    qr=qw=0;
    enq(ra,ca,0,1);
    while(qr<qw){
        int y=q[qr].y;
        int x=q[qr].x;
        int z=q[qr].z;
        int d=q[qr].d;
        ++qr;
        if(s[y][x]=='.'&&dp2[y][x][z]==0&&(z?!(y==ra&&x==ca):!(y==rb&&x==cb))){
            dp2[y][x][z]=d;
            if(z==0&&dp1[y][x]>=0){
                enq(y,x,1,d+1);
            }
            enq(y-1,x,z,d+1);
            enq(y+1,x,z,d+1);
            enq(y,x-1,z,d+1);
            enq(y,x+1,z,d+1);
        }
    }
}
int f4a(int y,int x){
    return s[y][x]=='.'&&dp1[y][x]>=0;
}
void f4e(){
    for(int y=0;y<h;++y){
        for(int x=0;x<w;++x){
            if(dp1[y][x]==-2){
                dp1[y][x]=0;
            }
        }
    }
}
int f4(int y,int x){
    int d=1;
    while(1){
        int a1=f4a(y-1,x);
        int a2=f4a(y+1,x);
        int a3=f4a(y,x-1);
        int a4=f4a(y,x+1);
        int a=a1+a2+a3+a4;
        if(a>=2){
            f4e();
            return d*4;
        }
        if(a==0){
            f4e();
            return 30000000;
        }
        y+=a2-a1;
        x+=a4-a3;
        dp1[y][x]=-2;
        d+=1;
    }
}
main(){
    scanf("%d%d%d%d%d%d",&h,&w,&ra,&ca,&rb,&cb);
    --ra;--ca;--rb;--cb;
    for(int y=0;y<h;++y){
        scanf("%s",s[y]);
    }
    f1();
    int d1=dp1[rb][cb]-1;
    if(d1<0){
        puts("-1");
        exit(0);
    }
    f2(rb,cb);
    f3();
    int d2=dp2[rb][cb][1]-2;
    if(d2<0){
        d2=30000000;
    }
    int d;
    d=f4(ra,ca)+d1;
    if(d2>d) d2=d;
    d=f4(rb,cb)+d1;
    if(d2>d) d2=d;
    if(d2==30000000){
        puts("-1");
        exit(0);
    }
    printf("%d",d1+d2);
}
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