adding cs142 code

2016-04-06 20:45:34 -07:00
parent 552d456d53
commit 8e52ce1982
174 changed files with 14064 additions and 0 deletions
@@ -0,0 +1,56 @@
+#include <iostream>
+#include <string>
+#include <vector>
+using namespace std;
+
+#include "util.h"
+
+ostream & operator<<(ostream & os, vector<int> & v) {
+    os << "[";
+    for(unsigned int i = 0; i < v.size(); i++) {
+        os << v[i];
+        if(i != v.size() - 1) {
+            os << ", ";
+        }
+    }
+    os << "]";
+    return os;
+}
+
+int _increment_to_next_looser(const vector<bool> & players,
+                                            int start, const int step) {
+    int counter = 0;
+    // the test examples in the pdf have us start by killing the m-1th person
+    // offset by one for some dumb reason
+    int attempt = start - 1;
+    while(counter != step) {
+        attempt = (attempt + 1) % players.size();
+        if(players[attempt]) {
+            counter++;
+        }
+    }
+    return attempt;
+}
+
+vector<int> _play_game(vector<bool> & players, int step) {
+    vector<int> loosers;
+    int token = 0;
+    while(loosers.size() < players.size()) {
+        token = _increment_to_next_looser(players, token, step);
+        players[token] = false;
+        loosers.push_back(token);
+    }
+    return loosers;
+}
+
+int _test_run(int n, int m, bool verbose) {
+    if(m < 1) {
+        throw string("rule violation: m > 0");
+    }
+    vector<bool> players(n, true);
+    vector<int> loosers = _play_game(players, m);
+    if(verbose) {
+        cout << loosers << endl;
+    }
+    return loosers[loosers.size()-1];
+}