diff --git a/src/11/24/P1073.cpp b/src/11/24/P1073.cpp
new file mode 100644
index 0000000..cf85c15
--- /dev/null
+++ b/src/11/24/P1073.cpp
@@ -0,0 +1,67 @@
+#include <algorithm>
+#include <cstdint>
+#include <iostream>
+#include <istream>
+#include <queue>
+#include <vector>
+using ll = int64_t;
+#define sl static inline
+const ll maxn = 100000+7, maxm=500000+7,inf=1e9+7;
+ll n,m,p[maxn],maxp[maxn],minp[maxn],ans=-inf;
+std::vector<std::vector<ll>> edg,redg;
+int main(){
+    std::iostream::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+
+    std::cin>>n>>m;
+    edg.resize(n+1);
+    redg=edg;
+    std::fill(maxp+1,maxp+1+n,-inf);
+    std::fill(minp+1,minp+1+n,inf);
+    for(ll i=1;i<=n;i++){
+        std::cin>>p[i];
+    }
+    for(ll i=1;i<=m;i++){
+        ll x,y,z;
+        std::cin>>x>>y>>z;
+        if(z==1){
+            edg[x].emplace_back(y);
+            redg[y].emplace_back(x);
+        }else{
+            edg[x].emplace_back(y);
+            edg[y].emplace_back(x);
+            redg[x].emplace_back(y);
+            redg[y].emplace_back(x);
+        }
+    }
+    
+    std::queue<ll> q;
+    q.emplace(n);
+    maxp[n]=p[n];
+    while(q.size()){
+        ll u=q.front();
+        q.pop();
+        for(ll v:redg[u]){
+            if(maxp[u]<=maxp[v]){
+                continue;
+            }
+            maxp[v]=std::max(p[v],maxp[u]);
+            q.emplace(v);
+        }
+    }
+    minp[1]=p[1];
+    q.emplace(1);
+    while(q.size()){
+        ll u=q.front();
+        q.pop();
+        ans=std::max(maxp[u]-minp[u],ans);
+        for(ll v:edg[u]){
+            if(minp[u]>=minp[v]){
+                continue;
+            }
+            minp[v]=std::min(p[v],minp[u]);
+            q.emplace(v);
+        }
+    }
+    std::cout<<ans<<"\n";
+}
diff --git a/src/11/24/P5121.cpp b/src/11/24/P5121.cpp
new file mode 100644
index 0000000..f78e61d
--- /dev/null
+++ b/src/11/24/P5121.cpp
@@ -0,0 +1,116 @@
+#include <bitset>
+#include <cstdint>
+#include <cstdio>
+#include <iostream>
+#include <istream>
+#include <queue>
+#include <utility>
+#include <vector>
+using ll = int64_t;
+#define sl static inline
+#define printf
+const ll m=10;
+ll n,k;
+std::vector<std::vector<char>> v;
+std::vector<std::bitset<m+1>> vis;
+const ll dir[4][2]={{1,0},{0,1},{-1,0},{0,-1}};
+std::vector<std::pair<ll, ll>> mb;
+
+sl bool find(ll i,ll j){
+    printf("--START i=%lld, j=%lld\n",i,j);
+    mb.clear();
+    ll num=1;
+    std::queue<std::pair<ll, ll>> q;
+    q.emplace(i,j);
+    vis[i][j]=true;
+    char c=v[i][j];
+    while(q.size()){
+        auto[x,y]=q.front();
+        q.pop();
+        for(ll k=0;k<4;k++){
+            ll nx=x+dir[k][0],ny=y+dir[k][1];
+            if(nx<1||nx>n||ny<1||ny>m||c!=v[nx][ny]||vis[nx][ny])continue;
+            vis[nx][ny]=true;
+            num++;
+            q.emplace(nx,ny);
+        }
+        if(num>=k){
+            v[x][y]='0';
+            printf("find x=%lld, y=%lld\n",x,y);
+        }else{
+            mb.emplace_back(x,y);
+        }
+    }
+    if(num>=k){
+        for(auto[x,y]:mb){
+            v[x][y]='0';
+            printf("find x=%lld, y=%lld\n",x,y);
+        }
+        mb.clear();
+    }
+    return num>=k;
+}
+
+sl void pm(){
+    for(ll i=1;i<=n;i++){
+        for(ll j=1;j<=m;j++){
+            printf("%c",v[i][j]);
+        }
+        printf("\n");
+    }
+    printf("---\n");
+}
+
+sl void move(){
+    for(ll j=1;j<=m;j++){
+        ll l=-1;
+        for(ll i=n;i>=1;i--){
+            if(v[i][j]=='0'&&l==-1)l=i;
+            else if(l!=-1&&v[i][j]!='0'){
+                v[l][j]=v[i][j];
+                v[i][j]='0';
+                l--;
+            }
+        }
+    }
+}
+
+sl bool check(){
+    vis.clear();
+    vis.resize(n+1);
+    bool ret=false;
+    for(ll i=1;i<=n;i++){
+        for(ll j=1;j<=m;j++){
+            if(v[i][j]!='0'){
+                if(find(i,j)){
+                    pm();
+                    pm();
+                    ret=true;
+                }
+            }
+        }
+    }
+    move();
+    return ret;
+}
+
+int main(){
+    std::iostream::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+
+    std::cin>>n>>k;
+    v.resize(n+1,std::vector<char>(m+1));
+    vis.resize(n+1);
+    for(ll i=1;i<=n;i++){
+        for(ll j=1;j<=m;j++){
+            std::cin>>v[i][j];
+        }
+    }
+    while (check());
+    for(ll i=1;i<=n;i++){
+        for(ll j=1;j<=m;j++){
+            std::cout<<v[i][j];
+        }
+        std::cout<<"\n";
+    }
+}
\ No newline at end of file