sparse table

.gitignore

@@ -53,3 +53,7 @@ day5/perfect/perfect
 day5/good/good
 day5/fair/fair
 day5/RMQ/st
+day5/RMQ/st_raw
+build
+.xmake
+.vscode

.vscode/launch.json

@@ -1,30 +0,0 @@
-{
-    // 使用 IntelliSense 了解相关属性。 
-    // 悬停以查看现有属性的描述。
-    // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387
-    "version": "0.2.0",
-    "configurations": [
-        {
-            "type": "gdb",
-            "request": "launch",
-            "name": "GDB",
-            "program": "${workspaceFolder}/${command:AskForProgramName}",
-            "stopOnEntry": true
-        },
-        {
-            "type": "by-gdb",
-            "request": "launch",
-            "name": "Launch(gdb)",
-            "program": "${fileBasenameNoExtension}",
-            "cwd": "${workspaceRoot}"
-        },
-        {
-            "type": "lldb",
-            "request": "launch",
-            "name": "Debug",
-            "program": "${workspaceFolder}/?",
-            "args": [],
-            "cwd": "${workspaceFolder}"
-        }
-    ]
-}

day5/RMQ/1.in

@@ -0,0 +1,7 @@
+5 5
+1 2 3 4 5
+1 2
+2 3
+3 4
+2 4
+4 5

day5/RMQ/st_raw.cpp

@@ -1,7 +1,62 @@
 #include<bits/stdc++.h>
 using namespace std;
 
+#ifdef OIDEBUG
+#define PRINT_ARRAY(v,size){cout<<#v<<" [";for(int i=1;i<=size;i++){cout<<v[i]<<(i!=(size)?",":"]\n");}}
+#define PRINT_VALUE(v){cout<<#v<<" :"<<(v)<<endl;}
+#define DEBUG_CODE(code){code}
+#endif
+
+#ifndef OIDEBUG
+#define PRINT_ARRAY(v,size)
+#define PRINT_VALUE(v)
+#define DEBUG_CODE(code)
+#endif
+
+const int MAX_N=1e3+5;
+constexpr const int MAX_K=303;
+int k,log_2[MAX_N],n,a[MAX_N],s[MAX_N][MAX_K],m;
 
 int main(){
+    cin>>n>>m;
+    log_2[1]=0;
+    for(int i=2;i<=n;i++){
+        log_2[i]=log_2[i/2]+1;
+    }
+    k=log_2[n]+1;
+    PRINT_VALUE(log_2[3])
+    PRINT_ARRAY(log_2, n)
+    for(int i=1;i<=n;i++){
+        cin>>a[i];
+    }
+    PRINT_ARRAY(a, n);
+    for(int i=1;i<=n;i++){
+        s[i][0]=a[i];
+    }
+    PRINT_VALUE(k);
+    for(int j=1;j<=k;j++){
+        PRINT_VALUE(1<<j);
+        for(int i=1;i+(1<<j)-1<=n;i++){
+            PRINT_VALUE(i);
+            PRINT_VALUE(j);
+            PRINT_VALUE(i+(1<<j))
+            s[i][j]=min(s[i][j-1],s[i+(j>>1)][j-1]);
+            PRINT_VALUE(s[i][j]);
+        }
+    }
 
+    for(int i=1;i<=m;i++){
+        int r,l;
+        cin>>l>>r;
+        PRINT_VALUE(l);
+        PRINT_VALUE(r);
+        int j=log_2[r-l+1];
+        PRINT_VALUE(j);
+        PRINT_VALUE(r-l+1);
+        PRINT_VALUE(s[l][j]);
+        PRINT_VALUE(s[r-(1<<j)+1][j]);
+        PRINT_VALUE(r-(1<<j)+1);
+        PRINT_VALUE(1<<j);
+        cout<<min(s[l][j],s[r-(1<<j)+1][j])<<endl;
+    }
 }

xmake.lua

@@ -0,0 +1,6 @@
+add_rules("mode.release","mode.debug")
+target("st_raw")
+    set_kind("binary")
+    add_files("day5/RMQ/st_raw.cpp")
+    -- add_cxxflags("-DOIDEBUG")
+    set_rundir("./day5/RMQ")