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Cod sursa(job #696018)
#include<fstream>
using namespace std;
ifstream fin("rj.in");
ofstream fout("rj.out");
int o[8]={-1,-1,1,0,0,1,1,-1};
int v[8]={-1,0,1,-1,1,-1,0,1};
struct coada { int lin,col; } c[10001];
int rom[101][101],jul[101][101],i,j,ij,jj,ir,jr,inc,sf,m,n;
char x[101];
void citire()
{
fin>>n>>m;fin.get();
for(i=1;i<=n;i++)
{
fin.getline(x,101);
for(j=0;j<m;j++)
{
if(x[j]=='X') rom[i][j+1]=jul[i][j+1]=-1;
if(x[j]=='R') {ir=i;jr=j+1;}
if(x[j]=='J') {ij=i;jj=j+1;}
}
}
}
int corectr(int li,int co)
{
return li>=1 && li<=n && co>=1 && co<=m && rom[li][co]==0;
}
int corectj(int li,int co)
{
return li>=1 && li<=n && co>=1 && co<=m && jul[li][co]==0;
}
void adaug(int x,int y)
{
sf++;
c[sf].lin=x;
c[sf].col=y;
}
void romeo()
{
rom[ir][jr]=1;
inc=1;sf=0;
adaug(ir,jr);
while(inc<=sf)
{
for(i=0;i<8;i++)
if(corectr(c[inc].lin+o[i],c[inc].col+v[i]))
{
rom[c[inc].lin+o[i]][c[inc].col+v[i]]=rom[c[inc].lin][c[inc].col]+1;
adaug(c[inc].lin+o[i],c[inc].col+v[i]);
}
inc++;
}
}
void julieta()
{
jul[ij][jj]=1;
inc=1;sf=0;
adaug(ij,jj);
while(inc<=sf)
{
for(i=0;i<8;i++)
if(corectj(c[inc].lin+o[i],c[inc].col+v[i]))
{
jul[c[inc].lin+o[i]][c[inc].col+v[i]]=jul[c[inc].lin][c[inc].col]+1;
adaug(c[inc].lin+o[i],c[inc].col+v[i]);
}
inc++;
}
}
void afisare()
{
int Mx=999999999,mxi,mxj;
for(i=1;i<=n;i++)
for(j=1;j<=m;j++)
if(rom[i][j]==jul[i][j] && rom[i][j]>0) if(rom[i][j]<Mx) {Mx=rom[i][j];mxi=i;mxj=j;}
fout<<Mx-1<<' '<<mxi<<' '<<mxj;
}
int main()
{
citire();
romeo();
julieta();
afisare();
return 0;
fin.close();
fout.close();
}