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authorHaidong Ji2018-12-27 10:38:46 -0600
committerHaidong Ji2018-12-27 10:38:46 -0600
commitb9808ba0d4ff582a30f3a407fb11078232797009 (patch)
tree4ecf7c57a2256e050ff4efbb8eabdf2b5f62582f /PlaygroundCpp
parente7d4f50b766be809373a465767dfe3e05ac2ad37 (diff)
Knapsack partition3 done!
Diffstat (limited to 'PlaygroundCpp')
-rw-r--r--PlaygroundCpp/Sources/Playground.cpp61
1 files changed, 46 insertions, 15 deletions
diff --git a/PlaygroundCpp/Sources/Playground.cpp b/PlaygroundCpp/Sources/Playground.cpp
index 50297b2..3083cdc 100644
--- a/PlaygroundCpp/Sources/Playground.cpp
+++ b/PlaygroundCpp/Sources/Playground.cpp
@@ -4,10 +4,10 @@
using std::vector;
-int optimalWeight(int W, vector<int> &w2) {
+vector<vector<int>> optimalWeight2DArray(int W, vector<int> &w2) {
int j = w2.size();
// int value[W + 1][j + 1];
- vector< vector<int> > value(W + 1, vector<int>(j + 1));
+ vector<vector<int> > value(W + 1, vector<int>(j + 1));
for (int i = 0; i < j + 1; i++) {
for (int w = 0; w < W + 1; w++) {
@@ -25,22 +25,53 @@ int optimalWeight(int W, vector<int> &w2) {
}
}
- return value[W][j];
+ return value;
}
-//TEST(Knapsack, t1) {
-// vector<int> w = { 1, 4, 8 };
-// int W = 10;
-// ASSERT_EQ(9, optimalWeight(W, w));
+int partition3(vector<int> &a) {
+ if (a.size() < 3)
+ return 0;
+ int sum = 0;
+ for (int i = 0; i < a.size(); i++) {
+ sum = sum + a[i];
+ }
+ if (sum % 3 != 0)
+ return 0;
+ int W = sum / 3;
+ vector<vector<int> > values = optimalWeight2DArray(W, a);
+ int count = 0;
+ for (int i = 1; i < a.size() + 1; i++) {
+ for (int w = 1; w < W + 1; w++) {
+ if (values[w][i] == W)
+ count = count + 1;
+ }
+ }
+ if (count >= 3)
+ return 1;
+ else
+ return 0;
+}
+//TEST(KnapsackPartition3, t1) {
+// vector<int> a = { 3, 3, 3, 3 };
+// ASSERT_EQ(0, partition3(a));
+//}
+//
+//TEST(KnapsackPartition3, t2) {
+// vector<int> a = { 30 };
+// ASSERT_EQ(0, partition3(a));
+//}
+//
+//TEST(KnapsackPartition3, t3) {
+// vector<int> a = { 1, 2, 3, 4, 5, 5, 7, 7, 8, 10, 12, 19, 25 };
+// ASSERT_EQ(1, partition3(a));
//}
int main() {
- int n, W;
- std::cin >> W >> n;
- vector<int> w(n);
- for (int i = 0; i < n; i++) {
- std::cin >> w[i];
- }
- std::cout << optimalWeight(W, w) << '\n';
+ int n;
+ std::cin >> n;
+ vector<int> A(n);
+ for (size_t i = 0; i < A.size(); ++i) {
+ std::cin >> A[i];
+ }
+ std::cout << partition3(A) << '\n';
}
-