#include <bits/stdc++.h>
using namespace std;
int n, m, k;
vector<string> v;
vector<int> from;
vector<pair<long long, long long> > speed;
int X[4] = {1, -1, 0, 0};
int Y[4] = {0, 0, 1, -1};
bool inbounds(const int& x, const int& y)
{
if (x < 0 || y < 0 || x >= n || y >= m)
return false;
return v[x][y] == '.';
}
void bfs()
{
from.assign(n * m, -1);
from[0] = 0;
queue<int> q;
q.push(0);
while (!q.empty())
{
pair<int, int> top = make_pair(q.front() / m, q.front() % m);
for (int i = 0; i < 4; i++)
{
int x = top.first + X[i], y = top.second + Y[i];
if (inbounds(x, y) && from[x * m + y] == -1)
{
from[x * m + y] = q.front();
q.push(x * m + y);
}
}
q.pop();
}
long long up = 0, down = 0;
for (int i = n * m - 1; i > 0; i = from[i])
++(from[i] > i ? down : up);
long long fastest = 1000000000000000001;
for (pair<long long, long long>& i : speed)
fastest = min(fastest, i.first * up + i.second * down);
int count = 0;
for (pair<long long, long long>& i : speed)
count += fastest == i.first * up + i.second * down;
cout << fastest << ' ' << count << '\n';
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cin >> n >> m >> k;
v.resize(n);
for (string& s : v)
cin >> s;
speed.resize(k);
for (pair<long long, long long>& i : speed)
cin >> i.first >> i.second;
bfs();
}
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 | #include <bits/stdc++.h> using namespace std; int n, m, k; vector<string> v; vector<int> from; vector<pair<long long, long long> > speed; int X[4] = {1, -1, 0, 0}; int Y[4] = {0, 0, 1, -1}; bool inbounds(const int& x, const int& y) { if (x < 0 || y < 0 || x >= n || y >= m) return false; return v[x][y] == '.'; } void bfs() { from.assign(n * m, -1); from[0] = 0; queue<int> q; q.push(0); while (!q.empty()) { pair<int, int> top = make_pair(q.front() / m, q.front() % m); for (int i = 0; i < 4; i++) { int x = top.first + X[i], y = top.second + Y[i]; if (inbounds(x, y) && from[x * m + y] == -1) { from[x * m + y] = q.front(); q.push(x * m + y); } } q.pop(); } long long up = 0, down = 0; for (int i = n * m - 1; i > 0; i = from[i]) ++(from[i] > i ? down : up); long long fastest = 1000000000000000001; for (pair<long long, long long>& i : speed) fastest = min(fastest, i.first * up + i.second * down); int count = 0; for (pair<long long, long long>& i : speed) count += fastest == i.first * up + i.second * down; cout << fastest << ' ' << count << '\n'; } int main() { ios_base::sync_with_stdio(false); cin.tie(NULL); cin >> n >> m >> k; v.resize(n); for (string& s : v) cin >> s; speed.resize(k); for (pair<long long, long long>& i : speed) cin >> i.first >> i.second; bfs(); } |
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