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Cod sursa(job #976076)
#include <iostream>
#include <fstream>
#include <string>
#include <queue>
using namespace std;
ifstream f("rj.in");
ofstream g("rj.out");
struct punct{
int x, y;
};
string aux;
int a[110][110], b[110][110];
int n, m;
punct R, J;
punct directii[8] = {{0, 1}, {1, 1}, {1, 0}, {1, -1}, {0, -1}, {-1, -1}, {-1, 0}, {-1, 1}};
queue <punct> coada;
int isgut(punct p) {
if (p.x < 1 || p.x > n)
return 0;
if (p.y < 0 || p.y >= m)
return 0;
if(a[p.x][p.y] == 0)
return 1;
return 0;
}
int isgut2(punct p) {
if (p.x < 1 || p.x > n)
return 0;
if (p.y < 0 || p.y >= m)
return 0;
if(b[p.x][p.y] == 0)
return 1;
return 0;
}
int main()
{
f >> n >> m;
getline(f, aux);
for (int i = 1; i <= n; i++) {
getline(f, aux);
for (int j = 0; j < m; j++) {
if (aux[j] == 'R') {
R.x = i;
R.y = j;
}
if (aux[j] == 'J') {
J.x = i;
J.y = j;
}
if (aux[j] == 'X') {
a[i][j] = -1;
b[i][j] = -1;
}
else {
a[i][j] = 0;
b[i][j] = 0;
}
}
}
/*for (int i = 1; i <= n; i++) {
for (int j = 0; j < m; j++) {
cout << a[i][j] << ' ';
}
cout << endl;
}
cout << endl;
cout << R.x << ' ' << R.y << endl;
cout << J.x << ' ' << J.y << endl;*/
coada.push(R);
a[R.x][R.y] = 1;
while (coada.size()) {
punct aux1;
aux1 = coada.front();
coada.pop();
for (int i = 0; i < 8; i++) {
punct aux2;
aux2.x = aux1.x + directii[i].x;
aux2.y = aux1.y + directii[i].y;
if (isgut(aux2)) {
a[aux2.x][aux2.y] = a[aux1.x][aux1.y] + 1;
coada.push(aux2);
}
}
}
/*cout << endl;
for (int i = 1; i <= n; i++) {
for (int j = 0; j < m; j++) {
cout << a[i][j] << ' ';
}
cout << endl;
}
cout << endl;*/
coada.push(J);
b[J.x][J.y] = 1;
while (coada.size()) {
punct aux1;
aux1 = coada.front();
coada.pop();
for (int i = 0; i < 8; i++) {
punct aux2;
aux2.x = aux1.x + directii[i].x;
aux2.y = aux1.y + directii[i].y;
if (isgut2(aux2)) {
b[aux2.x][aux2.y] = b[aux1.x][aux1.y] + 1;
coada.push(aux2);
}
}
}
/*cout << endl;
for (int i = 1; i <= n; i++) {
for (int j = 0; j < m; j++) {
cout << b[i][j] << ' ';
}
cout << endl;
}
cout << endl;*/
int costmin = 100010, xmin = n + 1, ymin = m + 1;
for (int i = 1; i <= n; i++) {
for (int j = 0; j < m; j++) {
if (a[i][j] == b[i][j] && a[i][j] > 0 && a[i][j] < costmin) {
costmin = a[i][j];
xmin = i;
ymin = j + 1;
}
}
}
g << costmin << ' ' << xmin << ' ' << ymin;
return 0;
}