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source/DP/LineContainerGMS.cpp

@@ -0,0 +1,38 @@
+namespace LC
+{
+
+vll line;
+int getline(ll c)
+{
+    int k = 0, st = 20;
+    while(st+1)
+    {
+        int now = k+(1<<st); st--;
+        if(now >= line.size()) continue;
+        
+        if(line[now].fi*c+line[now].se < line[now-1].fi*c+line[now-1].se) k = now;
+    }
+    return k;
+}
+void pushline(pll C)
+{
+    while(line.size() >= 2)
+    {
+        pll A = line[line.size()-2];
+        pll B = line.back();
+        
+        A = {A.fi-C.fi, A.se-C.se};
+        B = {B.fi-C.fi, B.se-C.se};
+        A.se = -A.se; B.se = -B.se;
+        
+        if(A.fi<0) A = {-A.fi, -A.se};
+        if(B.fi<0) B = {-B.fi, -B.se};
+        
+        
+        if(A.se*B.fi >= B.se*A.fi) line.pop_back();
+        else break;
+    }
+    line.pb(C);
+}
+
+} // namespace LC