1 files changed, 27 insertions, 0 deletions
diff --git a/other/divideAndConquer.cpp b/other/divideAndConquer.cpp
new file mode 100644
index 0000000..92ec0ef
--- /dev/null
+++ b/other/divideAndConquer.cpp
@@ -0,0 +1,27 @@
+vector<vector<ll>> dp;
+vector<vector<ll>> C;
+
+void rec(int i, int j0, int j1, int k0, int k1) {
+	if (j1 < j0) return;
+	int jmid = (j0 + j1) / 2;
+
+	dp[i][jmid] = inf;
+	int bestk = k0;
+	for (int k = k0; k < min(jmid, k1 + 1); ++k) {
+		if (dp[i - 1][k] + C[k + 1][jmid] < dp[i][jmid]) {
+			dp[i][jmid] = dp[i - 1][k] + C[k + 1][jmid];
+			bestk = k;
+	}}
+
+	rec(i, j0, jmid - 1, k0, bestk);
+	rec(i, jmid + 1, j1, bestk, k1);
+}
+
+ll calc(int n, int k) {
+	dp = vector<vector<ll>>(k, vector<ll>(n, inf));
+	for (int i = 0; i < n; i++) dp[0][i] = C[0][i];
+	for (int i = 1; i < k; i++) {
+		rec(i, 0, n - 1, 0, n - 1);
+	}
+	return dp[k - 1][n - 1];
+}