摘要：
A 签到 int main() { for (int i = 2; i <= 2020; ++i) { if (!v[i]) prime[++tot] = i; for (int j = 1; j <= tot && prime[j] <= 2020 / i; ++j) { v[i * prime[ 阅读全文
摘要：
进攻 排序贪心 ll a[N]; PLL b[N]; int main() { IOS; cin >> n >> m; rep (i, 1, n) cin >> a[i]; rep (i, 1, m) cin >> b[i].se; rep (i, 1, m) cin >> b[i].fi; sor 阅读全文