Merge pull request #118 from atcoder/patch/issue117

yosupo06 · web-flow · commit db0826383c5a · 2021-03-26T21:50:52.000+09:00
fix #117: remove unnecesarry move
diff --git a/atcoder/convolution.hpp b/atcoder/convolution.hpp
@@ -136,7 +136,7 @@ std::vector<mint> convolution_fft(std::vector<mint> a, std::vector<mint> b) {
     a.resize(n + m - 1);
     mint iz = mint(z).inv();
     for (int i = 0; i < n + m - 1; i++) a[i] *= iz;
-    return std::move(a);
+    return a;
 }
 
 }  // namespace internal

Original file line number	Diff line number	Diff line change
`@@ -136,7 +136,7 @@ std::vector<mint> convolution_fft(std::vector<mint> a, std::vector<mint> b) {`
`136`	`136`	`a.resize(n + m - 1);`
`137`	`137`	`mint iz = mint(z).inv();`
`138`	`138`	`for (int i = 0; i < n + m - 1; i++) a[i] *= iz;`
`139`		`- return std::move(a);`
	`139`	`+ return a;`
`140`	`140`	`}`
`141`	`141`
`142`	`142`	`} // namespace internal`