Guesses are cleaned from information already known

solver.hpp

@@ -78,11 +78,39 @@ public:
 		return {};
 	}
 
+	// Clear what we already know
+	Historic_guess clean(Historic_guess hist) {
+		// The correct colors we know
+		for(int n = 0; n < known.N; n++) {
+			if(known.final_color(n) == hist.guess[n]) {
+				hist.guess[n] = -1;
+				hist.response[1] -= 1;
+			}
+		}
+
+		// The out-of-place colors we know
+		for(int n = 0; n < known.N; n++) {
+			if(hist.guess[n] == -1)
+				continue;
+			for(int i = 0; i < known.N; i++) {
+				if(i == n)
+					continue;
+				if(known.final_color(i) == hist.guess[n]) {
+					hist.guess[n] = -1;
+					hist.response[0] -= 1;
+				}
+			}
+		}
+
+		return hist;
+	}
+
 	// Specific reactions
 	void if_not_here_then_nowhere(vector<int> guess) {
 		// Get all positions of these colors
 		auto positions_of_colors = vector<vector<int>>(known.M, vector<int>(0));
 		for(int n = 0; n < known.N; n++)
+			if(guess[n] > -1)
 				positions_of_colors[guess[n]].push_back(n);
 
 		// If color can't be anywhere here, it can't be in the sequence
@@ -97,20 +125,31 @@ public:
 	}
 	void not_here(vector<int> guess) {
 		for(int n = 0; n < known.N; n++)
+			if(guess[n] > -1)
 				known.cannot_be(n, guess[n]);
 	}
 	void empty(vector<int> guess) {
 		for(int col : guess)
+			if(col > -1)
 				known.empty_color(col);
 	}
 
 	bool learn_back(Historic_guess hist) {
 		bool something_to_learn = true;
-		// TODO
+
+		hist = clean(hist);
+		// TODO Actually learn
+
 		return something_to_learn;
 	}
-	void learn(vector<int> guess, vector<int> response) {
+	void learn(vector<int> p_guess, vector<int> p_response) {
 		bool something_to_learn;
+
+		// A bit of cleaning
+		auto cleaned = clean({p_guess, p_response});
+		vector<int> guess = cleaned.guess;
+		vector<int> response = cleaned.response;
+		
 		// None of these colors are there
 		if(response[0] == 0 && response[1] == 0) {
 			empty(guess);
@@ -126,6 +165,7 @@ public:
 		// At least only on the right spot
 		else if(response[0] == 0) {
 			if_not_here_then_nowhere(guess);
+			// TODO maybe I can guess which one is right
 			something_to_learn = true;
 		}
 
@@ -142,10 +182,9 @@ public:
 				i--;
 			}
 
-
 		// Write to history
 		if(something_to_learn)
-			history.push_back({guess, response});
+			history.push_back({p_guess, p_response});
 	}
 	void print() {
 		known.print();