Fix

Author: adamant-pwn

cp-algo/structures/bit_array.hpp

@@ -70,7 +70,7 @@ namespace cp_algo::structures {
         auto operator <=> (_bit_array const& t) const = default;
 
         constexpr _bit_array& xor_hint(_bit_array const& t, size_t hint) {
-            for(size_t i = hint / width; i < std::size(data); i++) {
+            for(size_t i = hint / width; i < words; i++) {
                 data[i] ^= t.data[i];
             }
             return *this;

verify/structures/bitpack/prod_mod_2.test.cpp

@@ -36,9 +36,6 @@ void solve() {
         cin >> row;
         from_string(a[i], row);
     }
-    for(auto &it: b) {
-        it.resize(k);
-    }
     for(int i = 0; i < m; i++) {
         cin >> row;
         from_string(b[i], row);