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gzshawnliang · Aug 25, 2019 · e437387 · e437387
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diff --git a/myCpps/!-OJcreater.cpp b/myCpps/!-OJcreater.cpp
@@ -12,7 +12,7 @@
 using namespace std;
 
 //***************************************
-const string CPPfile = "cellphoneTyping_UVA12526"; //*
+const string CPPfile = "freeParentheses_UVA1238"; //*
 //***************************************
 
 ifstream fin(CPPfile + ".cpp");

diff --git a/myCpps/freeParentheses_UVA1238.cpp b/myCpps/freeParentheses_UVA1238.cpp
@@ -0,0 +1,63 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+ifstream fin("freeParentheses_UVA1238.in");
+ofstream fout("freeParentheses_UVA1238.out");
+
+const int N = 3000;
+
+void solve(int i, int openC, int sum, vector<int> & isPositive, vector<int> & a, set<int> & res, vector<vector<vector<int>>> & dp)
+{
+    int n = a.size();
+
+    if (dp[i][openC][sum + N]) return;
+
+    if (i == n - 1)
+    {
+        res.insert(sum);
+        return;
+    }
+
+    int add = a[i + 1] * isPositive[i + 1] * ((openC % 2 == 0) ? 1 : -1);
+
+    if (isPositive[i + 1] == -1) solve(i + 1, openC + 1, sum + add, isPositive, a, res, dp);
+    if (openC > 0)               solve(i + 1, openC - 1, sum + add, isPositive, a, res, dp);
+                                 solve(i + 1, openC,     sum + add, isPositive, a, res, dp);
+
+    dp[i][openC][sum + N] = 1;
+}
+
+int main()
+{
+    while (true)
+    {
+        string s = ""; getline(fin, s);
+        if (s == "") break;
+
+        s = "+ " + s;
+
+        vector<int> isPositive, a;
+        istringstream intputS(s);
+        while (true)
+        {
+            char ch = '_'; string n_s = ""; intputS >> ch >> n_s;
+            if (n_s == "") break;
+
+            if (ch == '+') isPositive.push_back(1);
+            else isPositive.push_back(-1);
+
+            if (ch == '+') a.push_back(stoi(n_s));
+            else a.push_back(stoi(n_s));
+        }
+
+        int n = a.size();
+        set<int> res;
+        vector<vector<vector<int>>> dp(n, vector<vector<int>>(n, vector<int>(N * 2 + 1, 0)));
+        solve(0, 0, a[0], isPositive, a, res, dp);
+
+        fout << res.size() << '\n';
+    }
+
+    return 0;
+}
diff --git a/myCpps/freeParentheses_UVA1238.in b/myCpps/freeParentheses_UVA1238.in
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diff --git a/myCpps/freeParentheses_UVA1238.out b/myCpps/freeParentheses_UVA1238.out
@@ -0,0 +1,100 @@
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diff --git a/myCpps/freeParentheses_UVA1238OJ.cpp b/myCpps/freeParentheses_UVA1238OJ.cpp
@@ -0,0 +1,65 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+
+const int N = 3000;
+
+void solve(int i, int openC, int sum, vector<int> & isPositive, vector<int> & a, set<int> & res, vector<vector<vector<int>>> & dp)
+{
+    int n = a.size();
+
+    if (dp[i][openC][sum + N]) return;
+
+    if (i == n - 1)
+    {
+        res.insert(sum);
+        return;
+    }
+
+    int add = a[i + 1] * isPositive[i + 1] * ((openC % 2 == 0) ? 1 : -1);
+
+    if (isPositive[i + 1] == -1) solve(i + 1, openC + 1, sum + add, isPositive, a, res, dp);
+    if (openC > 0)               solve(i + 1, openC - 1, sum + add, isPositive, a, res, dp);
+                                 solve(i + 1, openC,     sum + add, isPositive, a, res, dp);
+
+    dp[i][openC][sum + N] = 1;
+}
+
+int main()
+{
+	ios_base::sync_with_stdio(false);
+	std::cin.tie(NULL);
+    while (true)
+    {
+        string s = ""; getline(cin, s);
+        if (s == "") break;
+
+        s = "+ " + s;
+
+        vector<int> isPositive, a;
+        istringstream intputS(s);
+        while (true)
+        {
+            char ch = '_'; string n_s = ""; intputS >> ch >> n_s;
+            if (n_s == "") break;
+
+            if (ch == '+') isPositive.push_back(1);
+            else isPositive.push_back(-1);
+
+            if (ch == '+') a.push_back(stoi(n_s));
+            else a.push_back(stoi(n_s));
+        }
+
+        int n = a.size();
+        set<int> res;
+        vector<vector<vector<int>>> dp(n, vector<vector<int>>(n, vector<int>(N * 2 + 1, 0)));
+        solve(0, 0, a[0], isPositive, a, res, dp);
+
+        cout << res.size() << '\n';
+    }
+
+   	cout.flush();
+   	return 0;
+}
+
diff --git a/myCpps/freeParentheses_UVA1238_AC.cpp b/myCpps/freeParentheses_UVA1238_AC.cpp
@@ -0,0 +1,53 @@
+
+#include <bits/stdc++.h>
+using namespace std;
+
+int num[35], sign[35], cnt;
+int memo[35][35][6500];
+set<int> S;
+
+void dp(int open, int n, int value)
+{
+    if (memo[open][n][value + 3200] != -1)
+        return;
+    if (n == cnt - 1)
+    {
+        S.insert(value);
+        return;
+    }
+    int nval = sign[n + 1] * num[n + 1] * (open % 2 == 0 ? 1 : -1);
+    if (open > 0)
+        dp(open - 1, n + 1, value + nval);
+    if (sign[n + 1] == -1)
+        dp(open + 1, n + 1, value + nval);
+    dp(open, n + 1, value + nval);
+    memo[open][n][value + 3200] = 0;
+}
+
+int main()
+{
+    freopen("freeParentheses_UVA1238.in", "r", stdin);
+    freopen("freeParentheses_UVA1238.out", "w", stdout);
+
+    string s;
+    char c;
+    while (getline(cin, s))
+    {
+        stringstream sin;
+        sin << s;
+        sin >> num[0];
+        S.clear();
+        sign[0] = 1;
+        cnt = 1;
+        while (sin >> c)
+        {
+            sign[cnt] = c == '-' ? -1 : 1;
+            sin >> num[cnt];
+            cnt++;
+        }
+        memset(memo, -1, sizeof memo);
+        dp(0, 0, num[0]);
+        printf("%d\n", (int)S.size());
+    }
+    return 0;
+}
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,100 @@
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		2
		348
		3
		155
		1046
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		1
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		1295
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		86
		611
		87
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		906
		998
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		1296
		16
		631
		1037
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		166
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		1
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		488
		100
		28
		619
		1210
		758
		843
		56
		202
		735
		482
		713
		943
		651
		1
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		113
		866
		1044
		92
		3
		2
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		66
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		1044
		932
		26
		498
		92
		327
		1035
		983
		560
		36
		7
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		1121
		89
		11
		844
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		1046
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		1074
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