diff --git a/exo3.py b/exo3.py
index cd9ac48..3eb8bce 100644
--- a/exo3.py
+++ b/exo3.py
@@ -1,5 +1,49 @@
+import sys
+
+
+def assign_cable(cables):
+    for i, available in enumerate(cables):
+        if available == 1:
+            cables[i] = 0
+            return i + 1
+    return False
+
+
+def restore_cable(cables, cable):
+    cables[cable] = 1
+
+
 def main():
-    pass
+    lines = []
+    for line in sys.stdin:
+        lines.append(line.rstrip("\n"))
+
+    number_of_cables, number_of_requests = map(int, lines[0].split())
+    cables = []
+    requests = []
+    for _ in range(number_of_cables):
+        cables.append(1)
+    for line in lines[1:]:
+        start, end = map(int, line.split())
+        requests.append({"start": start, "end": end, "cable": None})
+
+    assignations = []
+
+    for time in range(2501):
+        for request in requests:
+            if time == request["end"]:
+                restore_cable(cables, request["cable"])
+        for request in requests:
+            if time == request["start"]:
+                cable = assign_cable(cables)
+                if cable is False:
+                    print("pas possible")
+                    return
+                else:
+                    request["cable"] = cable
+                    assignations.append(cable)
+
+    print(" ".join(map(str, assignations)))
 
 
 if __name__ == "__main__":