diff --git a/src/P3371/P3371.cpp b/src/P3371/P3371.cpp
new file mode 100644
index 0000000..bfb21d4
--- /dev/null
+++ b/src/P3371/P3371.cpp
@@ -0,0 +1,59 @@
+#include <algorithm>
+#include <cstdint>
+#include <functional>
+#include <iostream>
+#include <queue>
+#include <utility>
+#include <vector>
+
+using ll = int64_t;
+using std::cin, std::cout;
+
+const ll maxn = 1e5+5;
+ll n, m, s, dist[maxn], inf {(1ll<<31)-1};
+std::vector<std::pair<ll, ll>> adj[maxn];
+
+int main(){
+    std::iostream::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
+
+    cin>>n>>m>>s;
+
+    std::fill(dist, dist+1+n, inf);
+    dist[s]=0;
+    for(ll i{1}; i<=m; i++){
+        ll u, v, w;
+        cin>>u>>v>>w;
+        for(auto& edge: adj[u]){
+            if(edge.first==v){
+                edge.second=std::min(edge.second, w);
+                goto end;
+            }
+        }
+        adj[u].emplace_back(v, w);
+        end:;
+    }
+
+    std::priority_queue<std::pair<ll, ll>, std::vector<std::pair<ll, ll>>, std::greater<>> pq;
+
+    pq.emplace(0, s);
+
+    while(pq.size()){
+        auto [d, u] = pq.top();
+        pq.pop();
+
+        if(d>dist[u])continue;
+
+        for(auto& edge: adj[u]){
+            auto [v, w] {edge};
+            if(dist[u] + w < dist[v]){
+                dist[v] = dist[u] + w;
+                pq.emplace(dist[v], v);
+            }
+        }
+    }
+
+    for(ll i{1}; i<=n; i++){
+        cout<<dist[i]<<' ';
+    }
+    cout<<'\n';
+}
\ No newline at end of file
diff --git a/src/P3371/P3371_1.in b/src/P3371/P3371_1.in
new file mode 100644
index 0000000..520c708
--- /dev/null
+++ b/src/P3371/P3371_1.in
@@ -0,0 +1,16 @@
+5 15 5
+2 5 181
+1 5 98
+4 2 49
+3 2 262
+4 3 26
+2 4 192
+5 1 221
+2 2 254
+4 4 233
+1 5 44
+5 4 67
+4 2 214
+1 1 47
+1 1 118
+5 4 3
diff --git a/src/P3371/P3371_1.out b/src/P3371/P3371_1.out
new file mode 100644
index 0000000..f968523
--- /dev/null
+++ b/src/P3371/P3371_1.out
@@ -0,0 +1 @@
+221 52 29 3 0 
diff --git a/src/P6147/P6147.cpp b/src/P6147/P6147.cpp
new file mode 100644
index 0000000..88e303e
--- /dev/null
+++ b/src/P6147/P6147.cpp
@@ -0,0 +1,23 @@
+#include <cstdint>
+#include <iostream>
+#include <vector>
+
+using ll = int64_t;
+using std::cin, std::cout;
+
+const ll maxn = 1e5+5;
+ll n;
+std::vector<ll> adj[maxn];
+
+int main(){
+    std::iostream::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
+
+    cin>>n;
+    for(ll i{1}; i<n; i++){
+        ll u, v;
+        cin>>u>>v;
+        adj[u].push_back(v);
+    }
+
+    
+}
\ No newline at end of file