update

src/8/26/P7414.cpp

@@ -3,4 +3,8 @@
 dp[i][j]=从第i个到第j个涂成指定颜色需要的次数
 
 
-*/
+*/
+
+int main(){
+    
+}

src/8/27/P1880.cpp

@@ -0,0 +1,32 @@
+/*
+
+
+
+*/
+#include <cstdint>
+#include <iostream>
+#include <stdexcept>
+#include <vector>
+using ll = int64_t;
+
+int main(){
+    ll n;
+    std::cin>>n;
+    std::vector<ll> arr(n*2+1);
+    std::vector<ll> pre(n*2+1);
+    for(ll i=1;i<=n;i++){
+        std::cin>>arr[i];
+        arr[n+i]=arr[i];
+    }
+    for(ll i=1;i<=2*n;i++){
+        pre[i]=pre[i-1]+arr[i];
+    }
+    std::vector<std::vector<ll>> dp;
+    for(ll i=1;i<n;i++){
+        ll j=i+n-1;
+        dp.clear();
+        dp.resize(2*n+1,std::vector<ll>(2*n+1,1e9));
+        // for(ll x=1;)
+        throw std::runtime_error("NotImpletmented");
+    }
+}

src/8/27/opj1808.cpp

@@ -0,0 +1,48 @@
+/*
+
+dp[i][j]=字符串A到第i位与字符串B到第j位的最长公共子序列长度
+if a[i]==b[j]:
+    dp[i][j]=dp[i-1][j-1]+1
+else:
+    dp[i][j]=max(
+        dp[i-1][j],
+        dp[i][j-1]
+    )
+
+*/
+
+
+#include <algorithm>
+#include <iostream>
+#include <istream>
+#include <string>
+#include <vector>
+
+using ll = int64_t;
+
+int main(){
+    std::iostream::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+    std::string a,b;
+    std::vector<std::vector<ll>> dp;
+    while (std::cin>>a>>b) {
+        ll n=a.size(),m=b.size();
+        a=' '+a;
+        b=' '+b;
+        dp.clear();
+        dp.resize(n+1,std::vector<ll>(m+1));
+        for(ll i=1;i<=n;i++){
+            for(ll j=1;j<=m;j++){
+                if(a[i]==b[j]){
+                    dp[i][j]=dp[i-1][j-1]+1;
+                }else{
+                    dp[i][j]=std::max(
+                        dp[i-1][j],
+                        dp[i][j-1]
+                    );
+                }
+            }
+        }
+        std::cout<<dp[n][m]<<"\n";
+    }
+}

src/8/27/opj2000.cpp

@@ -0,0 +1,81 @@
+#include <algorithm>
+#include <cstdint>
+#include <iostream>
+#include <istream>
+#include <ostream>
+#include <tuple>
+#include <vector>
+
+/*
+
+dp[i][j]=字符串A前i个与字符串B前j个
+5
+1 4 2 5 -12
+4
+-12 1 2 4
+
+*/
+
+
+using ll = int64_t;
+
+#define gdp(i,j,k)(std::get<k>(dp[i][j]))
+
+int main(){
+    std::iostream::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+    ll n,m;
+    std::cin>>n;
+    std::vector<ll> a(n+1);
+    for(ll i=1;i<=n;i++)std::cin>>a[i];
+    std::cin>>m;
+    std::vector<ll> b(m+1);
+    for(ll j=1;j<=m;j++)std::cin>>b[j];
+    std::vector<std::vector<std::tuple<ll,ll,ll>>>dp(n+1,std::vector<std::tuple<ll,ll,ll>>(m+1));
+    for(ll i=1;i<=n;i++){
+        for(ll j=1;j<=m;j++){
+            if(a[i]!=b[j]){
+                gdp(i, j, 0) = gdp(i-1,j,0);
+                gdp(i, j, 1)=i-1;
+                gdp(i, j, 2)=j;
+            }else{
+                ll maxprev=0;
+                for(ll k=1;k<j;k++){
+                    if(b[k]<a[i]){
+                        maxprev=std::max(maxprev,gdp(i-1,k,0));
+                        gdp(i,j,1)=i-1;
+                        gdp(i,j,2)=k;
+                    }
+                }
+                gdp(i,j,0)=maxprev+1;
+            }
+        }
+    }
+    ll ans=0,maxi=0,maxj=0;
+    for(ll i=1;i<=n;i++){
+        for(ll j=1;j<=m;j++){
+            // printf("dp[%lld][%lld]=%lld\n",i,j,dp[i][j]);
+            if(ans<gdp(i,j,0)){
+                ans=gdp(i,j,0);
+                maxi=i;
+                maxj=j;
+            }
+        }
+    }
+    std::vector<ll> ans2;
+    ans2.reserve(n);
+    // printf("maxi=%lld,maxj=%lld\n",maxi,maxj);
+    while(maxi>0){
+        ans2.push_back(a[maxi]);
+        ll tmpi=maxi;
+        maxi=gdp(maxi,maxj,1);
+        maxj=gdp(tmpi,maxj,2);
+    }
+    std::cout<<ans<<"\n";
+    std::reverse(ans2.begin(),ans2.end());
+    for(auto i:ans2){
+        std::cout<<i<<" ";
+    }
+    std::cout<<std::endl;
+    _Exit(0);
+}