const& in dft *=

adamant-pwn · adamant-pwn · commit b826b2eb2616 · 2024-05-30T03:09:36.000+02:00
diff --git a/cp-algo/math/fft.hpp b/cp-algo/math/fft.hpp
@@ -151,7 +151,7 @@ namespace cp_algo::math::fft {
             }
         }
 
-        std::vector<base> operator *= (dft B) {
+        std::vector<base> operator *= (dft const& B) {
             assert(A.size() == B.A.size());
             size_t n = A.size();
             if(!n) {

Original file line number	Diff line number	Diff line change
`@@ -151,7 +151,7 @@ namespace cp_algo::math::fft {`
`151`	`151`	`}`
`152`	`152`	`}`
`153`	`153`
`154`		`- std::vector<base> operator *= (dft B) {`
	`154`	`+ std::vector<base> operator *= (dft const& B) {`
`155`	`155`	`assert(A.size() == B.A.size());`
`156`	`156`	`size_t n = A.size();`
`157`	`157`	`if(!n) {`