fb hackercup 2013 qual round

unknown · unknown · commit 6c3fe682fbf5 · 2013-01-29T16:42:48.000-08:00
diff --git a/HackerCup/2013/Qual/a.cpp b/HackerCup/2013/Qual/a.cpp
@@ -0,0 +1,38 @@
+#include <iostream>
+#include <algorithm>
+#include <string>
+#include <vector>
+using namespace std;
+
+string str;
+
+void run() {
+    int mm[26] = {0};
+    getline(cin, str);
+    for (int i = 0; i < str.length(); ++i) {
+        char ch = tolower(str[i]);
+        if (ch < 'a' || ch > 'z') continue;
+        ++mm[ch - 'a'];
+    }
+    vector<int> ct;
+    for (int i = 0; i < 26; ++i) {
+        if (mm[i] != 0) ct.push_back(mm[i]);
+    }
+    sort(ct.begin(), ct.end());
+    int ret = 0, mu = 26;
+    for (int i = ct.size() - 1; i >= 0; --i, --mu) {
+        ret += mu * ct[i];
+    }
+    cout << ret << endl;
+}
+
+int main() {
+    int m;
+    cin >> m;
+    getline(cin, str);
+    for (int i = 1; i <= m; ++i) {
+        cout << "Case #" << i << ": ";
+        run();
+    }        
+    return 0;
+}
diff --git a/HackerCup/2013/Qual/b.cpp b/HackerCup/2013/Qual/b.cpp
@@ -0,0 +1,71 @@
+#include <iostream>
+#include <cstring>
+#include <string>
+using namespace std;
+
+#define REP(i,n) for(int i=0;i<(n);++i)
+#define FOR(i,a,b) for(int i=(a);i<=(b);++i)
+
+string str;
+int len;
+int mm[105][105];
+
+int dp(int st, int ed) {
+    int& ret = mm[st][ed];
+    if (ret != -1) return ret;
+
+    if (st > ed) return ret = 1;
+
+    FOR(i,st,ed) {
+        if (str[i] == '(') {
+            if (i - 1 >= st && str[i - 1] == ':') {
+                if (dp(i + 1, ed) == 1) return ret = 1;
+            }
+            FOR(j,i+1,ed) {
+                if (str[j] == ')') {
+                    if (dp(i + 1, j - 1) == 1 && dp(j + 1, ed) == 1) return ret = 1;
+                }
+            }
+            return ret = 0;
+        } else if (str[i] == ')') {
+            if (i - 1 >= st && str[i - 1] == ':') {
+                return ret = dp(i + 1, ed);
+            }
+            return ret = 0;
+        }
+    }
+
+    return ret = 1;
+}
+
+bool isvalid(char ch) {
+    if ((ch >= 'a' && ch <= 'z') || ch == ' ' || ch == ':' || ch == '(' || ch == ')') return true;
+    return false;
+}
+
+bool run() {
+    REP(i,len) {
+        if (!isvalid(str[i])) return false;
+    }
+    memset(mm, -1, sizeof(mm));
+    int ret = dp(0, len - 1);
+    return ret == 1;
+}
+
+int main() {
+    int m;
+    cin >> m;
+    getline(cin, str);
+    FOR(i,1,m) {
+        cout << "Case #" << i << ": ";
+        getline(cin, str);
+        len = str.length();
+        if (str.empty()) {
+            cout << "YES" << endl;
+            continue;
+        }
+        if (run()) cout << "YES" << endl;
+        else cout << "NO" << endl;
+    }
+    return 0;
+}
diff --git a/HackerCup/2013/Qual/c.cpp b/HackerCup/2013/Qual/c.cpp
@@ -0,0 +1,57 @@
+#include <iostream>
+#include <algorithm>
+#include <vector>
+using namespace std;
+
+#define REP(i,n) for(int i=0;i<(n);++i)
+#define FOR(i,a,b) for(int i=(a);i<=(b);++i)
+#define INF 1000000000
+typedef long long LL;
+
+void run() {
+    int n, k, a, b, c, r;
+    cin >> n >> k >> a >> b >> c >> r;
+    vector<int> mm(k);
+    mm[0] = a;
+    FOR(i,1,k-1) {
+        LL t = b;
+        t *= mm[i - 1];
+        t += c;
+        mm[i] = t % r;
+    }
+    vector<int> t(k + 1), v(k + 5, 0);
+    REP(i,k) {
+        if (mm[i] < k) v[mm[i]]++;
+    }
+    int pt = 0;
+    int last = INF;
+    REP(i,k) {
+        while (v[pt] >= 1) ++pt;
+        int idx = -1;
+        if (last < pt && v[last] == 0) idx = last;
+        else {
+            idx = pt;
+            ++pt;
+        }
+        t[i] = idx;
+        v[idx]++;
+        if (mm[i] < k) {
+            v[mm[i]]--;
+        }
+        last = mm[i];
+    }
+    while (v[pt] >= 1) ++pt;
+    t[k] = min(last, pt);
+    n %= (k + 1);
+    cout << t[n] << endl;
+}
+
+int main() {
+    int m;
+    cin >> m;
+    FOR(i,1,m) {
+        cout << "Case #" << i << ": ";
+        run();
+    }
+    return 0;
+}
diff --git a/HackerCup/2013/Qual/readme.txt b/HackerCup/2013/Qual/readme.txt
@@ -0,0 +1 @@
+https://www.facebook.com/hackercup/problems.php?round=185564241586420

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+https://www.facebook.com/hackercup/problems.php?round=185564241586420`