1 files changed, 21 insertions, 20 deletions

diff --git a/math/transforms/seriesOperations.cpp b/math/transforms/seriesOperations.cpp
index 3851a1e..4743674 100644
--- a/math/transforms/seriesOperations.cpp
+++ b/math/transforms/seriesOperations.cpp
@@ -1,55 +1,56 @@
-vector<ll> poly_inv(vector<ll> a, int n){
+vector<ll> poly_inv(const vector<ll>& a, int n) {
 	vector<ll> q = {powMod(a[0], mod-2, mod)};
-	for(int len = 1; len < n; len *= 2){
+	for (int len = 1; len < n; len *= 2){
 		vector<ll> a2 = a, q2 = q;
 		a2.resize(2*len), q2.resize(2*len);
 		ntt(q2);
-		for(int j = 0; j < 2; j++){
+		for (int j : {0, 1}) {
 			ntt(a2);
-			for(int i = 0; i < 2*len; i++) a2[i] = a2[i] * q2[i] % mod;
+			for (int i = 0; i < 2*len; i++) a2[i] = a2[i]*q2[i] % mod;
 			ntt(a2, true);
-			for(int i = 0; i < len; i++) a2[i] = 0;
+			for (int i = 0; i < len; i++) a2[i] = 0;
 		}
-		for(int i = len; i < min(n, 2*len); i++) q.push_back((mod - a2[i]) % mod);
-	}
+		for (int i = len; i < min(n, 2*len); i++) {
+			q.push_back((mod - a2[i]) % mod);
+	}}
 	return q;
 }
 
-vector<ll> poly_deriv(vector<ll> a){
-	for(int i = 0; i < sz(a)-1; i++)
-		a[i] = a[i+1] * (i+1) % mod;
+vector<ll> poly_deriv(vector<ll> a) {
+	for (int i = 1; i < sz(a); i++)
+		a[i-1] = a[i] * i % mod;
 	a.pop_back();
 	return a;
 }
 
-vector<ll> poly_integr(vector<ll> a){
-	if(a.empty()) return {0};
+vector<ll> poly_integr(vector<ll> a) {
+	if (a.empty()) return {0};
 	a.push_back(a.back() * powMod(sz(a), mod-2, mod) % mod);
-	for(int i = sz(a)-2; i > 0; i--)
+	for (int i = sz(a)-2; i > 0; i--)
 		a[i] = a[i-1] * powMod(i, mod-2, mod) % mod;
 	a[0] = 0;
 	return a;
 }
 
-vector<ll> poly_log(vector<ll> a, int n){
+vector<ll> poly_log(vector<ll> a, int n) {
 	a = mul(poly_deriv(a), poly_inv(a, n));
 	a.resize(n-1);
 	a = poly_integr(a);
 	return a;
 }
 
-vector<ll> poly_exp(vector<ll> a, int n){
+vector<ll> poly_exp(vector<ll> a, int n) {
 	vector<ll> q = {1};
-	for(int len = 1; len < n; len *= 2){
+	for (int len = 1; len < n; len *= 2) {
 		vector<ll> p = poly_log(q, 2*len);
-		for(int i = 0; i < 2*len; i++)
+		for (int i = 0; i < 2*len; i++)
 			p[i] = (mod - p[i] + (i < sz(a) ? a[i] : 0)) % mod;
 		vector<ll> q2 = q;
 		q2.resize(2*len);
 		ntt(p), ntt(q2);
-		for(int i = 0; i < 2*len; i++) p[i] = p[i] * q2[i] % mod;
+		for (int i = 0; i < 2*len; i++) p[i] = p[i] * q2[i] % mod;
 		ntt(p, true);
-		for(int i = len; i < min(n, 2*len); i++) q.push_back(p[i]);
+		for (int i = len; i < min(n, 2*len); i++) q.push_back(p[i]);
 	}
 	return q;
-}
\ No newline at end of file
+}