teamnote history merge

2025fall/source/DP/DnC.cpp

@@ -0,0 +1,12 @@
+//D[t][s...e]를 구해야 하고, j의 탐색 범위는 [l, r]
+void f(int t, int s, int e, int l, int r){
+    if(s > e) return;
+    int m = s + e >> 1;
+    int opt = l;
+    for(int i=l; i<=r; i++){
+        if(D[t-1][opt] + C[opt][m] > D[t-1][i] + C[i][m]) opt = i;
+    }
+    D[t][m] = D[t-1][opt] + C[opt][m];
+    f(t, s, m-1, l, opt);
+    f(t, m+1, e, opt, r);
+}