Zengtudor/algorithm_2024
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Zengtudor 2024-10-05 19:50:29 +08:00
parent b93eef8e0e
commit e17b83f199
1 changed files with 3 additions and 3 deletions
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src/U206625/U206625.cpp
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@ -9,7 +9,7 @@ constexpr auto range = std::ranges::views::iota;
constexpr size_t MAX_N{(size_t)3e5 + 5}, MOD{998244353};
string s;
ull stk[MAX_N], left_num[MAX_N], g[MAX_N], ans;
ull stk[MAX_N], left_num[MAX_N], dp[MAX_N], ans;
size_t stk_size;
int main() {
@ -19,8 +19,8 @@ int main() {
stk[stk_size++] = i + 1;
} else if (stk_size > 0) {
left_num[i] = stk[--stk_size];
g[i] = (g[left_num[i] - 2] + left_num[i]) % MOD;
ans = (ans + g[i] * (s.size() - i)) % MOD;
dp[i] = (dp[left_num[i] - 2] + left_num[i]) % MOD;
ans = (ans + dp[i] * (s.size() - i)) % MOD;
}
}
cout << ans << '\n';