update

src/P1030/P1030.cpp

@@ -1 +1,35 @@
-int main(){}
+#include <algorithm>
+#include <iostream>
+#include <string>
+
+using ll = long long;
+
+auto &is = std::cin;
+auto &os = std::cout;
+
+std::string m, r;
+
+void dfs(const std::string_view &sv)noexcept{
+    if(sv.size()==0){
+        return;
+    }
+    ll max_rpos{};
+    for(auto &i:sv){
+        max_rpos = std::max((ll)r.find(i),max_rpos);
+    }
+    
+    const ll sv_root_pos{(ll)sv.find(r[max_rpos])};
+
+    os<<sv[sv_root_pos];
+    dfs(std::string_view(sv.data(),sv_root_pos));
+    dfs(std::string_view(sv.begin()+sv_root_pos+1,sv.size()-sv_root_pos-1));
+}
+
+int main(){
+    is>>m>>r;
+    os<<r.back();
+    dfs(std::string_view(m.data(),m.find(r.back())));
+    dfs(std::string_view(m.data()+1+m.find(r.back())
+                                ,m.size()-m.find(r.back())-1));
+    os<<'\n';
+}

src/P5019/P5019.cpp

@@ -0,0 +1,41 @@
+#include <cctype>
+#include <cstdio>
+#include <iostream>
+
+using ll =  long long;
+
+ll n,a,b,ans;
+
+struct ReadLL{
+    char c;
+    ll n,w;
+    ReadLL&operator>>(ll &num)noexcept{
+        c=0,n=0,w=1;
+        while(!isdigit(c)){
+            if(c=='-')w=-1;
+            c=getchar();
+        }
+        while(isdigit(c)){
+            n=n*10+c-'0';
+            c=getchar();
+        }
+        num=n*w;
+        return *this;
+    }
+}readll;
+
+// auto &is = std::cin;
+auto &is = readll;
+auto &os = std::cout;
+
+int main(){
+    is>>n;
+    for(ll i{0};i!=n;i++){
+        is>>b;
+        if(b>a){
+            ans+=b-a;
+        }
+        a=b;
+    }
+    os<<ans<<'\n';
+}