diff --git a/src/2/15/T178360.cpp b/src/2/15/T178360.cpp
new file mode 100644
index 0000000..294989d
--- /dev/null
+++ b/src/2/15/T178360.cpp
@@ -0,0 +1,3 @@
+int main(){
+    
+}
\ No newline at end of file
diff --git a/src/2/15/T316692.cpp b/src/2/15/T316692.cpp
new file mode 100644
index 0000000..88596c6
--- /dev/null
+++ b/src/2/15/T316692.cpp
@@ -0,0 +1,49 @@
+#include <bits/stdc++.h>
+using namespace std;
+int main(){
+    ios::sync_with_stdio(false);
+    cin.tie(0);
+    
+    int n, m, q;
+    cin >> n >> m >> q;
+
+    vector<vector<int>> arr(n+1, vector<int>(m+1, -1));
+
+    int x = 0, y = 0;
+    int dx = 1, dy = 1;
+    int t = 0;
+    
+    while (true){
+        t++;
+        x += dx;
+        y += dy;
+
+        if( (x == 0 || x == n) && (y == 0 || y == m)){
+            if(arr[x][y] == -1){
+                arr[x][y] = t;
+            }
+            break;
+        }
+
+        if(arr[x][y] == -1){
+            arr[x][y] = t;
+        }
+
+        if(x == 0 || x == n){
+            dx *= -1;
+        }
+        if(y == 0 || y == m){
+            dy *= -1;
+        }
+    }
+    
+    while(q--){
+        int qx, qy;
+        cin >> qx >> qy;
+        if(qx <0 || qx >n || qy <0 || qy >m){
+            cout << "-1\n";
+            continue;
+        }
+        cout << arr[qx][qy] << "\n";
+    }
+}
\ No newline at end of file