From cda502d79c630095d3d5d7d3a79864fa27363ce0 Mon Sep 17 00:00:00 2001
From: ddidderr <ddidderr@paul.network>
Date: Tue, 19 Jul 2022 08:20:15 +0200
Subject: [PATCH] time tracking

---
 src/main.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/main.rs b/src/main.rs
index e83f928..1d728f1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,5 @@
+use std::time::Instant;
+
 struct SField {
     field: Vec<usize>,
     fixed: Vec<usize>,
@@ -401,9 +403,11 @@ impl SField {
 
     #[inline(always)]
     fn solve(&mut self) {
+        let now = Instant::now();
         if !self.solve_backtracking() {
             println!("there is no solution.");
         }
+        println!("took {:.3}s", now.elapsed().as_secs_f64());
     }
 }