diff --git a/solver.cpp b/solver.cpp
index 9300564..6b0eb2d 100644
--- a/solver.cpp
+++ b/solver.cpp
@@ -23,9 +23,9 @@ vector<int> Solver::guess() {
 }
 void Solver::learn(vector<int> guess, Response response) {
 	vector<vector<int>> next_possible(0);
-	for(int i = 0; i < possible.size(); i++)
-		if(validate(possible[i], guess) == response)
-			next_possible.push_back(possible[i]);
+	for(auto sequence : possible)
+		if(validate(sequence, guess) == response)
+			next_possible.push_back(sequence);
 
 	possible = next_possible;
 }