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| #include <bits/stdc++.h>
using namespace std;
const int maxn = 210;
char a[maxn][maxn], ss[maxn][maxn], can[maxn][maxn][2];
int och[200][2], was[maxn][maxn], n, q[maxn][maxn];
void bfs(int x, int y, int t) {
int b, e;
b = e = 1;
och[b][0] = x;
och[b][1] = y;
int dx[4] = {0, 1, 0, -1};
int dy[4] = {1, 0, -1, 0};
int tx, ty, i, j;
for (i = 0; i < n; ++i)
for (j = 0; j < n; ++j)
was[i][j] = -1;
was[x][y] = 0;
while (b <= e) {
x = och[b][0];
y = och[b][1];
if (was[x][y] == t) {
++b;
continue;
}
for (i = 0; i < 4; ++i) {
tx = x + dx[i];
ty = y + dy[i];
if (tx < 0 || tx >= n || ty < 0 || ty >= n || a[tx][ty] == 'Y')
continue;
if (was[tx][ty] == -1) {
was[tx][ty] = was[x][y] + 1;
och[++e][0] = tx;
och[e][1] = ty;
}
}
++b;
}
}
struct edge {
int to;
int cap;
};
vector<edge> e;
vector<int> v[maxn];
int flag[maxn] = {0}, pos[maxn] = {0};
void addE(int from, int to, int d) {
edge ee;
ee.to = to;
ee.cap = d;
e.push_back(ee);
v[from].push_back(e.size() - 1);
ee.to = from;
ee.cap = 0;
e.push_back(ee);
v[to].push_back(e.size() - 1);
}
int s, t, mn;
bool dfs(int w) {
int i, reb, u, tmp;
flag[w] = 1;
if (w == t)
return true;
for (i = pos[w]; i < v[w].size(); i++) {
reb = v[w][i];
u = e[reb].to;
tmp = mn;
if (e[reb].cap > 0 && e[reb].cap < mn)
mn = e[reb].cap;
if (e[reb].cap > 0 && (flag[u] == 0 && dfs(u))) {
e[reb].cap -= mn;
e[reb ^ 1].cap += mn;
pos[w] = i + 1;
return true;
}
mn = tmp;
}
for (i = 0; i < pos[w]; i++) {
reb = v[w][i];
u = e[reb].to;
if (e[reb].cap > 0 && (flag[u] == 0 && dfs(u))) {
e[reb].cap -= mn;
e[reb ^ 1].cap += mn;
pos[w] = i + 1;
return true;
}
}
return false;
}
const int inf = 0x3f3f3f3f;
int flow() {
int i, fl = 1, res = 0;
while (fl) {
fl = 0;
for (i = 0; i <= t; i++) {
flag[i] = 0;
pos[i] = 0;
}
while (1) {
mn = inf;
if (!dfs(s))
break;
fl = 1;
flag[s] = flag[t] = 0;
res += mn;
}
}
return res;
}
void bfs2(int x, int y, int t) {
int fx, fy;
fx = x;
fy = y;
int cap = a[x][y] - '0';
int b, e;
b = e = 1;
och[b][0] = x;
och[b][1] = y;
int dx[4] = {0, 1, 0, -1};
int dy[4] = {1, 0, -1, 0};
int tx, ty, i, j;
for (i = 0; i < n; ++i)
for (j = 0; j < n; ++j)
q[i][j] = -1;
q[x][y] = 0;
addE(fx * n + fy, fx * n + fy + n * n, cap);
while (b <= e) {
x = och[b][0];
y = och[b][1];
if (q[x][y] == t || q[x][y] == was[x][y]) {
++b;
continue;
}
for (i = 0; i < 4; ++i) {
tx = x + dx[i];
ty = y + dy[i];
if (tx < 0 || tx >= n || ty < 0 || ty >= n || a[tx][ty] == 'Z' ||
a[tx][ty] == 'Y')
continue;
if (q[tx][ty] == -1 &&
(q[x][y] + 1 <= was[tx][ty] || was[tx][ty] == -1)) {
q[tx][ty] = q[x][y] + 1;
addE(fx * n + fy, tx * n + ty + n * n, cap);
och[++e][0] = tx;
och[e][1] = ty;
}
}
++b;
}
}
int main() {
int T, i, j, x, y;
cin >> n >> T;
for (i = 0; i < n; ++i) {
for (j = 0; j < n; ++j) {
cin >> a[i][j];
if (a[i][j] == 'Z') {
x = i;
y = j;
}
}
}
for (i = 0; i < n; ++i) {
for (j = 0; j < n; ++j)
cin >> ss[i][j];
}
bfs(x, y, T);
for (i = 0; i < n; ++i) {
for (j = 0; j < n; ++j) {
if (a[i][j] >= '0' && a[i][j] <= '9') {
bfs2(i, j, T);
}
}
}
s = n * n * 2 + 1;
t = n * n * 2 + 2;
for (i = 0; i < n; ++i) {
for (j = 0; j < n; ++j) {
if (a[i][j] >= '0' && a[i][j] <= '9')
addE(s, i * n + j, a[i][j] - '0');
if (ss[i][j] >= '1' && ss[i][j] <= '9')
addE(i * n + j + n * n, t, ss[i][j] - '0');
}
}
int res = flow();
cout << res;
return 0;
}
|
