two sum

1 files changed, 25 insertions, 0 deletions

diff --git a/src/bin/p0001.rs b/src/bin/p0001.rs
new file mode 100644
index 0000000..70128c9
--- /dev/null
+++ b/src/bin/p0001.rs
@@ -0,0 +1,25 @@
+use std::collections::HashMap;
+
+struct Solution {}
+impl Solution {
+    pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
+        let mut num_map : HashMap<i32, usize> = HashMap::new();
+
+        let mut i:usize = 0;
+        loop {
+            let index = target - nums[i];
+            match num_map.get(&index) {
+                Some(j) => break vec![i as i32, *j as i32],
+                None => {
+                    num_map.insert(nums[i], i);
+                    i = i + 1;
+                    continue;
+                }
+            }
+        }
+    }
+}
+
+fn main() {
+    println!("{:?}", Solution::two_sum(vec![2, 7, 11, 15], 9));
+}
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