AcWing/257/257.cpp

@@ -1,75 +0,0 @@
-#include <iostream>
-#include <array>
-#include <utility>
-#include <vector>
-
-using std::cin;
-using std::cout;
-const char endl = '\n';
-
-const int N = 20005;
-
-int n, m;
-std::array<int, N> color;
-std::array<std::vector<std::pair<int, int>>, N> g;
-
-bool dfs(int u, int color, int limit) {
-    ::color[u] = color;
-
-    for (auto e : g[u]) {
-        int v = e.first,
-            w = e.second;
-
-        if (w <= limit) continue;
-        if (::color[v]) {
-            if (::color[v] == color) return false;
-        } else if (!dfs(v, 3 - color, limit)) {
-            return false;
-        }
-    }
-
-    return true;
-}
-
-bool check(int limit) {
-    std::fill(color.begin(), color.end(), 0);
-
-    for (int i = 1; i <= n; i++) {
-        if (!color[i]) {
-            if (!dfs(i, 1, limit)) return false;
-        }
-    }
-
-    return true;
-}
-
-int main() {
-    std::ios::sync_with_stdio(false);
-    cin.tie(nullptr);
-
-    cin >> n >> m;
-
-    for (int i = 1, u, v, w; i <= m; i++) {
-        cin >> u >> v >> w;
-
-        g[u].emplace_back(v, w);
-        g[v].emplace_back(u, w);
-    }
-
-    int l = 0, r = 1e9, ans = 0;
-
-    while (l <= r) {
-        int mid = (l + r) >> 1;
-
-        if (check(mid)) {
-            ans = mid;
-            r = mid - 1;
-        } else {
-            l = mid + 1;
-        }
-    }
-
-    cout << ans << endl;
-
-    return 0;
-}

AcWing/378/378.cpp

@@ -1,64 +0,0 @@
-#include <iostream>
-#include <cstring>
-#include <vector>
-
-using std::cin;
-using std::cout;
-const char endl = '\n';
-
-const int N = 105;
-const int dx[] = {2, 2, -2, -2, 1, 1, -1, -1},
-          dy[] = {1, -1, 1, -1, 2, -2, 2, -2};
-
-int n, m, t, ans;
-std::pair<int, int> match[N][N];
-bool disabled[N][N], vis[N][N];
-
-bool dfs(int x, int y) {
-    for (int i = 0; i < 8; i++) {
-        int xx = x + dx[i],
-            yy = y + dy[i];
-
-        if (xx < 1 || xx > n || yy < 1 || yy > m) continue;
-        if (disabled[xx][yy] || vis[xx][yy]) continue;
-
-        vis[xx][yy] = true;
-
-        auto t = match[xx][yy];
-
-        if (!t.first || dfs(t.first, t.second)) {
-            match[xx][yy] = std::make_pair(x, y);
-            return true;
-        }
-    }
-
-    return false;
-}
-
-int main() {
-    std::ios::sync_with_stdio(false);
-    cin.tie(nullptr);
-
-    cin >> n >> m >> t;
-
-    for (int i = 1; i <= t; i++) {
-        int x, y;
-
-        cin >> x >> y;
-
-        disabled[x][y] = true;
-    }
-
-    for (int i = 1; i <= n; i++) {
-        for (int j = 1; j <= m; j++) {
-            if (disabled[i][j] || (i + j) % 2) continue;
-
-            memset(vis, 0x00, sizeof(vis));
-            if (dfs(i, j)) ans++;
-        }
-    }
-
-    cout << n * m - t - ans << endl;
-
-    return 0;
-}