#include<cstdio>
#include<cstdlib>
#include<iostream>
#include<vector>
#include<queue>
#include<bitset>
#include<string>
#include<stack>
#include<set>
#include<unordered_set>
#include<map>
#include<unordered_map>
#include<cstring>
#include<complex>
#include<cmath>
#include<iomanip>
#include<numeric>
#include<algorithm>
#include<list>
#include<functional>
#include<cassert>
#define mp make_pair
#define pb push_back
#define X first
#define Y second
#define y0 y12
#define y1 y22
#define INF 987654321
#define PI 3.141592653589793238462643383279502884
#define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
#define fdn(i,a,b,c) for(int (i)=(a);(i)>=(b);(i)-=(c))
#define MEM0(a) memset((a),0,sizeof(a));
#define MEM_1(a) memset((a),-1,sizeof(a));
#define ALL(a) a.begin(),a.end()
#define SYNC ios_base::sync_with_stdio(false);cin.tie(0)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef double db;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef pair<int, int> Pi;
typedef pair<ll, ll> Pll;
typedef pair<ld, ld> Pd;
typedef vector<int> Vi;
typedef vector<ll> Vll;
typedef vector<double> Vd;
typedef vector<Pi> VPi;
typedef vector<Pll> VPll;
typedef vector<Pd> VPd;
typedef tuple<int, int, int> iii;
typedef tuple<int,int,int,int> iiii;
typedef tuple<ll, ll, ll> LLL;
typedef vector<iii> Viii;
typedef vector<LLL> VLLL;
typedef complex<double> base;
const ll MOD = 1000000007;
ll POW(ll a, ll b, ll MMM = MOD) {ll ret=1; for(;b;b>>=1,a=(a*a)%MMM)if(b&1)ret=(ret*a)% MMM; return ret; }
ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }
ll lcm(ll a, ll b) { if (a == 0 || b == 0)return a + b; return a*(b / gcd(a, b)); }
int dx[] = { 0,1,0,-1,1,1,-1,-1 }, dy[] = { 1,0,-1,0,1,-1,1,-1 };
char s[404][404];
int n,m;
inline int z(int x,int y,int c){return ((x*m+y)<<1) +c;}
int dist[320005],cnt[320005];
int main() {
MEM_1(dist);
fill(cnt,cnt+320005,2);
scanf("%d%d",&n,&m);
fup(i,0,n-1,1)scanf("%s",s[i]);
deque<int> q;
fup(i,0,n-1,1)
{
cnt[z(i,0,0)]--;
cnt[z(i,m-1,1)]--;
}
fup(j,0,m-1,1)
{
if(s[0][j]=='N')cnt[z(0,j,1)]--;
else cnt[z(0,j,0)]--;
if(s[n-1][j]=='N')cnt[z(n-1,j,0)]--;
else cnt[z(n-1,j,1)]--;
fup(c,0,1,1)
{
if(cnt[z(0,j,c)]==0)
{
q.pb(z(0,j,c));
dist[z(0,j,c)]=1;
}
if(cnt[z(n-1,j,c)]==0)
{
q.pb(z(n-1,j,c));
dist[z(n-1,j,c)]=1;
}
}
}
while(!q.empty())
{
int Z=q.front();
q.pop_front();
int x=(Z>>1)/m,y=(Z>>1)%m,c=Z&1;
int nx,ny,nc;
if(dist[Z^1]==-1)
{
q.push_front(Z^1);
dist[Z^1]=dist[Z];
}
if(s[x][y]=='N')
{
if(c)
{
if(x>0)
{
nx=x-1,ny=y,nc=(s[nx][ny]=='N'?0:1);
int zz=z(nx,ny,nc);
cnt[zz]--;
if(dist[zz]==-1 && cnt[zz]==0)
{
dist[zz]=dist[Z]+1;
q.pb(zz);
}
}
if(y<m-1)
{
nx=x,ny=y+1,nc=0;
int zz=z(nx,ny,nc);
cnt[zz]--;
if(dist[zz]==-1 && cnt[zz]==0)
{
dist[zz]=dist[Z]+1;
q.pb(zz);
}
}
}
else
{
if(x<n-1)
{
nx=x+1,ny=y,nc=(s[nx][ny]=='N'?1:0);
int zz=z(nx,ny,nc);
cnt[zz]--;
if(dist[zz]==-1 && cnt[zz]==0)
{
dist[zz]=dist[Z]+1;
q.pb(zz);
}
}
if(y>0)
{
nx=x,ny=y-1,nc=1;
int zz=z(nx,ny,nc);
cnt[zz]--;
if(dist[zz]==-1 && cnt[zz]==0)
{
dist[zz]=dist[Z]+1;
q.pb(zz);
}
}
}
}
else
{
if(c)
{
if(x<n-1)
{
nx=x+1,ny=y,nc=(s[nx][ny]=='N'?1:0);
int zz=z(nx,ny,nc);
cnt[zz]--;
if(dist[zz]==-1 && cnt[zz]==0)
{
dist[zz]=dist[Z]+1;
q.pb(zz);
}
}
if(y<m-1)
{
nx=x,ny=y+1,nc=0;
int zz=z(nx,ny,nc);
cnt[zz]--;
if(dist[zz]==-1 && cnt[zz]==0)
{
dist[zz]=dist[Z]+1;
q.pb(zz);
}
}
}
else
{
if(x>0)
{
nx=x-1,ny=y,nc=(s[nx][ny]=='N'?0:1);
int zz=z(nx,ny,nc);
cnt[zz]--;
if(dist[zz]==-1 && cnt[zz]==0)
{
dist[zz]=dist[Z]+1;
q.pb(zz);
}
}
if(y>0)
{
nx=x,ny=y-1,nc=1;
int zz=z(nx,ny,nc);
cnt[zz]--;
if(dist[zz]==-1 && cnt[zz]==0)
{
dist[zz]=dist[Z]+1;
q.pb(zz);
}
}
}
}
}
fup(i,0,n-1,1)
{
fup(j,0,m-1,1)
{
int ans=dist[z(i,j,0)];
if(ans==-1)printf("%d ",ans);
else printf("%d ",2*ans);
}
puts("");
}
}
Compilation message
sandwich.cpp: In function 'int main()':
sandwich.cpp:70:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&n,&m);
~~~~~^~~~~~~~~~~~~~
sandwich.cpp:71:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
fup(i,0,n-1,1)scanf("%s",s[i]);
~~~~~^~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
2936 KB |
Output is correct |
| 2 |
Incorrect |
4 ms |
2808 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
2936 KB |
Output is correct |
| 2 |
Incorrect |
4 ms |
2808 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
