Create 1408D Searchlights.cpp

1408D Searchlights.cpp

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+#include<bits/stdc++.h>
+using namespace std;
+
+#define int long long
+#define ll long long
+#define pb push_back
+#define mp make_pair
+#define f(i,a,n) for(int i=a ; i<n ; i++)
+#define rf(i,n,a) for(int i=n ; i>=a ; i--)
+#define F first
+#define S second
+#define all(c) (c).begin(),(c).end()
+#define sz(v) (int)(v).size()
+#define fast ios::sync_with_stdio(0); cin.tie(0); cout.tie(0)
+
+typedef long double ld;
+typedef vector<int> vi;
+typedef pair<int, int> pii;
+typedef pair<pii, int> ppi;
+typedef vector<pii> vpi;
+
+const int inf = 1e9;
+const int inf64 = 1e18;
+const int MOD = inf + 7;
+const int N = 2e3 + 5;
+int n, m;
+vector<pii> v1, v2, v;
+map<pair<int, pii>, int> mm;
+
+int32_t main() {
+   fast;
+   cin >> n >> m;
+   for (int i = 0; i < n; i++) {
+      int t1, t2;
+      cin >> t1 >> t2;
+      v1.pb({t1, t2});
+   }
+
+   for (int i = 0; i < m; i++) {
+      int t1, t2;
+      cin >> t1 >> t2;
+      v2.pb({t1, t2});
+   }
+
+   for (int i = 0; i < m; i++) {
+      for (int j = 0; j < n; j++) {
+         if (v1[j].F <= v2[i].F && v1[j].S <= v2[i].S) {
+            v.pb({v2[i].F - v1[j].F + 1, v2[i].S - v1[j].S + 1});
+         }
+      }
+   }
+
+   int x = v.size();
+   sort(all(v));
+
+   int dp[x + 5] = {0};
+   for (int i = x - 1; i >= 0; i--) {
+      dp[i] = max(dp[i + 1], v[i].S);
+   }
+
+   int res = inf64;
+
+   for (int i = 0; i < x; i++) {
+      pair<int, int> pp = mp(v[i].F + 1, -1);
+      int pos = lower_bound(all(v), pp) - v.begin();
+      res = min(res, dp[pos] + v[i].F);
+   }
+
+   res = min(res, dp[0]);
+
+   cout << res << "\n";
+}