結果
| 問題 |
No.2891 Mint
|
| コンテスト | |
| ユーザー |
 Moss_Local
|
| 提出日時 | 2024-09-13 22:08:07 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
AC
|
| 実行時間 | 35 ms / 2,000 ms |
| コード長 | 4,906 bytes |
| コンパイル時間 | 14,979 ms |
| コンパイル使用メモリ | 399,612 KB |
| 実行使用メモリ | 5,376 KB |
| 最終ジャッジ日時 | 2024-09-13 22:08:25 |
| 合計ジャッジ時間 | 16,751 ms |
|
ジャッジサーバーID （参考情報） |
judge6 / judge1 |
（要ログイン）
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 54 |
コンパイルメッセージ
warning: variable does not need to be mutable
--> src/main.rs:117:9
|
117 | let mut vec: Vec<i64> = read_vec();
| ----^^^
| |
| help: remove this `mut`
|
= note: `#[warn(unused_mut)]` on by default
warning: variable does not need to be mutable
--> src/main.rs:123:9
|
123 | let mut vec: Vec<i64> = read_vec();
| ----^^^
| |
| help: remove this `mut`
warning: variable does not need to be mutable
--> src/main.rs:128:9
|
128 | let mut vec: Vec<usize> = read_vec();
| ----^^^
| |
| help: remove this `mut`
warning: variable does not need to be mutable
--> src/main.rs:134:9
|
134 | let mut vec: Vec<f64> = read_vec();
| ----^^^
| |
| help: remove this `mut`
warning: variable does not need to be mutable
--> src/main.rs:139:9
|
139 | let mut vec: Vec<char> = read_vec();
| ----^^^
| |
| help: remove this `mut`
warning: variable does not need to be mutable
--> src/main.rs:144:9
|
144 | let mut vec: Vec<usize> = read_vec();
| ----^^^
| |
| help: remove this `mut`
warning: variable does not need to be mutable
--> src/main.rs:149:9
|
149 | let mut vec: Vec<i64> = read_vec();
| ----^^^
| |
| help: remove this `mut`
warning: variable does not need to be mutable
--> src/main.rs:155:9
|
155 | let mut vec: Vec<usize> = read_vec();
| ----^^^
| |
| help: remove this `mut`
warning: variable `N` should have a snake case name
--> src/main.rs:188:9
|
188 | let N = n as u64;
| ^ help: convert the identifier to snake case: `n`
|
= note: `#[warn(non_snake_case)]` on by default
warning: variable `M` should have a snake case name
--> src/main.rs:189:9
|
189 | let M = m as
ソースコード
// -*- coding:utf-8-unix -*-
// #![feature(map_first_last)]
#![allow(dead_code)]
#![allow(unused_imports)]
#![allow(unused_macros)]
// use core::num;
use std::cmp::*;
use std::fmt::*;
use std::hash::*;
use std::iter::FromIterator;
use std::*;
use std::{cmp, collections, fmt, io, iter, ops, str};
const INF: i64 = 1223372036854775807;
const UINF: usize = INF as usize;
const LINF: i64 = 2147483647;
const INF128: i128 = 1223372036854775807000000000000;
const MOD1: i64 = 1000000007;
const MOD9: i64 = 998244353;
// const MOD: i64 = MOD2;
const UMOD: usize = MOD as usize;
const M_PI: f64 = 3.14159265358979323846;
// use proconio::input;
// const MOD: i64 = INF;
use cmp::Ordering::*;
use std::collections::*;
use std::io::stdin;
use std::io::stdout;
use std::io::Write;
macro_rules! p {
($x:expr) => {
//if expr
println!("{}", $x);
};
}
macro_rules! vp {
// vector print separate with space
($x:expr) => {
println!(
"{}",
$x.iter()
.map(|x| x.to_string())
.collect::<Vec<_>>()
.join(" ")
);
};
}
macro_rules! d {
($x:expr) => {
eprintln!("{:?}", $x);
};
}
macro_rules! yn {
($val:expr) => {
if $val {
println!("Yes");
} else {
println!("No");
}
};
}
macro_rules! map{
// declear btreemap
($($key:expr => $val:expr),*) => {
{
let mut map = ::std::collections::BTreeMap::new();
$(
map.insert($key, $val);
)*
map
}
};
}
macro_rules! set{
// declear btreemap
($($key:expr),*) => {
{
let mut set = ::std::collections::BTreeSet::new();
$(
set.insert($key);
)*
set
}
};
}
//input output
#[allow(dead_code)]
fn read<T: std::str::FromStr>() -> T {
let mut s = String::new();
std::io::stdin().read_line(&mut s).ok();
s.trim().parse().ok().unwrap()
}
#[allow(dead_code)]
fn read_vec<T: std::str::FromStr>() -> Vec<T> {
read::<String>()
.split_whitespace()
.map(|e| e.parse().ok().unwrap())
.collect()
}
#[allow(dead_code)]
fn read_mat<T: std::str::FromStr>(n: u32) -> Vec<Vec<T>> {
(0..n).map(|_| read_vec()).collect()
}
#[allow(dead_code)]
fn readii() -> (i64, i64) {
let mut vec: Vec<i64> = read_vec();
(vec[0], vec[1])
}
#[allow(dead_code)]
fn readiii() -> (i64, i64, i64) {
let mut vec: Vec<i64> = read_vec();
(vec[0], vec[1], vec[2])
}
#[allow(dead_code)]
fn readuu() -> (usize, usize) {
let mut vec: Vec<usize> = read_vec();
(vec[0], vec[1])
}
#[allow(dead_code)]
fn readff() -> (f64, f64) {
let mut vec: Vec<f64> = read_vec();
(vec[0], vec[1])
}
fn readcc() -> (char, char) {
let mut vec: Vec<char> = read_vec();
(vec[0], vec[1])
}
fn readuuu() -> (usize, usize, usize) {
let mut vec: Vec<usize> = read_vec();
(vec[0], vec[1], vec[2])
}
#[allow(dead_code)]
fn readiiii() -> (i64, i64, i64, i64) {
let mut vec: Vec<i64> = read_vec();
(vec[0], vec[1], vec[2], vec[3])
}
#[allow(dead_code)]
fn readuuuu() -> (usize, usize, usize, usize) {
let mut vec: Vec<usize> = read_vec();
(vec[0], vec[1], vec[2], vec[3])
}
use std::io::BufRead;
const MOD: u64 = 998244353;
fn floor_sqrt(n: u64) -> u64 {
if n == 0 || n == 1 {
return n;
}
let mut left = 0;
let mut right = n;
let mut ans = 0;
while left <= right {
let mid = left + (right - left) / 2;
if mid > 0 && mid > n / mid {
// Prevent overflow
right = mid - 1;
} else {
if mid * mid <= n {
ans = mid;
left = mid + 1;
} else {
right = mid - 1;
}
}
}
ans
}
fn main() {
let (n, m) = readuu();
let N = n as u64;
let M = m as u64;
let K_limit = floor_sqrt(M);
let k_max = if K_limit < N { K_limit } else { N };
let mut sum_k_floor_Mk: u128 = 0;
//愚直＋主客転倒
for k in 1..=k_max {
let q = M / k;
sum_k_floor_Mk += (k as u128) * (q as u128);
}
let q_max = if K_limit + 1 > 0 {
M / (K_limit + 1)
} else {
0
};
for q in 1..=q_max {
let mut l = (M / (q + 1)) + 1;
let mut r = M / q;
if l < K_limit + 1 {
l = K_limit + 1;
}
if r > N {
r = N;
}
if l > r {
continue;
}
let count = r - l + 1;
let sum_k = ((l as u128) + (r as u128)) * (count as u128) / 2;
sum_k_floor_Mk += (q as u128) * sum_k;
}
let total = (M as u128) * (N as u128);
let sum = total.wrapping_sub(sum_k_floor_Mk);
let result = (sum % (MOD as u128)) as u64;
println!("{}", result);
}