diff --git a/src/P1002/P1002.cpp b/src/P1002/P1002.cpp
new file mode 100644
index 0000000..3a78c4c
--- /dev/null
+++ b/src/P1002/P1002.cpp
@@ -0,0 +1,28 @@
+#include <bits/stdc++.h>
+using namespace std;
+using ll = int64_t;
+const ll maxn{ll(20+5)};
+ll mx,my,bx,by;
+ll dp[maxn][maxn];
+int main(){
+    iostream::sync_with_stdio(0),cin.tie(0),cout.tie(0);
+    cin>>bx>>by>>mx>>my;
+    mx+=1;
+    my+=1;
+    dp[0][1]=1;
+    for(ll i{1};i<=bx+1;i++){
+        for(ll j{1};j<=by+1;j++){
+            if(
+                (i==mx-1&&(j==my-2||j==my+2))||
+                (i==mx-2&&(j==my-1||j==my+1))||
+                (i==mx+1&&(j==my-2||j==my+2))||
+                (i==mx+2&&(j==my+1||j==my-1))
+                ||(i==mx&&j==my)
+            ){
+                continue;
+            }
+            dp[i][j]=dp[i-1][j]+dp[i][j-1];
+        }
+    }
+    cout<<dp[bx+1][by+1]<<'\n';
+}
\ No newline at end of file
diff --git a/src/P1176/P1176.cpp b/src/P1176/P1176.cpp
new file mode 100644
index 0000000..c72a83a
--- /dev/null
+++ b/src/P1176/P1176.cpp
@@ -0,0 +1,28 @@
+#include <bits/stdc++.h>
+using namespace std;
+using ll = int64_t;
+
+const ll maxn{1000+5},mod{100003};
+ll m,n,dp[maxn][maxn];
+bitset<maxn> obs[maxn];
+
+int main(){
+    ios::sync_with_stdio(false),cin.tie(0),cout.tie(0);
+    cin>>n>>m;
+    for(ll i{1};i<=m;i++){
+        ll x,y;
+        cin>>x>>y;
+        obs[x][y]=true;
+    }
+    obs[1][1]=true;
+    dp[1][1]=1;
+    for(ll i{1};i<=n;i++){
+        for(ll j{1};j<=n;j++){
+            if(obs[i][j]){
+                continue;
+            }
+            dp[i][j]=(dp[i-1][j]+dp[i][j-1])%mod;
+        }
+    }
+    cout<<dp[n][n]<<'\n';
+}
\ No newline at end of file
diff --git a/src/P7077/P7077.cpp b/src/P7077/P7077.cpp
new file mode 100644
index 0000000..cbf2bf8
--- /dev/null
+++ b/src/P7077/P7077.cpp
@@ -0,0 +1,56 @@
+#include <bits/stdc++.h>
+using namespace std;
+using ll = int64_t;
+
+const ll maxn{ll(1e5+5)}, mod{998244353};
+ll n,a[maxn],m,t[maxn],p[maxn],v[maxn],q;
+vector<ll> e[maxn];
+
+void dfs(ll const &f){
+    if(t[f]==1){
+        a[p[f]]=(a[p[f]]+v[f])%mod;
+    }else if(t[f]==2){
+        for(ll j{1};j<=n;j++){
+            a[j]=(a[j]*v[f])%mod;
+        }
+    }else{
+        for(auto const&i:e[f]){
+            dfs(i);
+        }
+    }   
+}
+
+int main(){
+    iostream::sync_with_stdio(0),cin.tie(0),cout.tie(0);
+    cin>>n;
+    for(ll i{1};i<=n;i++){
+        cin>>a[i];
+    }
+    cin>>m;
+    for(ll i{1};i<=m;i++){
+        cin>>t[i];
+        if(t[i]==1){
+            cin>>p[i]>>v[i];
+        }else if(t[i]==2){
+            cin>>v[i];
+        }else{
+            ll c;
+            cin>>c;
+            while(c--){
+                ll f;
+                cin>>f;
+                e[i].emplace_back(f);
+            }
+        }
+    }
+    cin>>q;
+    for(ll i{1};i<=q;i++){
+        ll f;
+        cin>>f;
+        dfs(f);
+    }
+    for(ll i{1};i<=n;i++){
+        cout<<a[i]<<' ';
+    }
+    cout<<'\n';
+}
\ No newline at end of file