結果
問題 | No.1997 X Lighting |
ユーザー |
![]() |
提出日時 | 2022-07-01 22:59:13 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 147 ms / 2,000 ms |
コード長 | 2,360 bytes |
コンパイル時間 | 4,508 ms |
コンパイル使用メモリ | 256,048 KB |
最終ジャッジ日時 | 2025-01-30 03:24:59 |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 30 |
ソースコード
#include <bits/stdc++.h>using namespace std;//*#include <atcoder/all>using namespace atcoder;//using mint = modint998244353;using mint = modint1000000007;//*/using ll = long long;using ld = long double;using pll = pair<ll, ll>;using tlll = tuple<ll, ll, ll>;constexpr ll INF = 1LL << 60;template<class T> bool chmin(T& a, T b) {if (a > b) {a = b; return true;} return false;}template<class T> bool chmax(T& a, T b) {if (a < b) {a = b; return true;} return false;}ll safemod(ll A, ll M) {ll res = A % M; if (res < 0) res += M; return res;}ll divfloor(ll A, ll B) {if (B < 0) {return divfloor(-A, -B);} return (A - safemod(A, B)) / B;}ll divceil(ll A, ll B) {if (B < 0) {return divceil(-A, -B);} return divfloor(A + B - 1, B);}ll mypowl(ll A, ll B) {ll res = 1; for (int i = 0; i < B; i++) {res *= A;} return res;}template<class T> void unique(vector<T> &V) {V.erase(unique(V.begin(), V.end()), V.end());}template<class T> void sortunique(vector<T> &V) {sort(V.begin(), V.end()); V.erase(unique(V.begin(), V.end()), V.end());}#define FINALANS(A) do {cout << (A) << '\n'; exit(0);} while (false)template<class T> void printvec(const vector<T> &V) {int _n = V.size(); for (int i = 0; i < _n; i++) cout << V[i] << (i == _n - 1 ? "" : " ");cout <<'\n';}template<class T> void printvect(const vector<T> &V) {for (auto v : V) cout << v << '\n';}template<class T> void printvec2(const vector<vector<T>> &V) {for (auto &v : V) printvec(v);}int main(){ll N, M;cin >> N >> M;vector<ll> X(M), Y(M);for (ll i = 0; i < M; i++){cin >> X.at(i) >> Y.at(i);}vector<ll> A, B;for (ll i = 0; i < M; i++){ll x = X.at(i), y = Y.at(i);A.push_back(y - x), B.push_back(y + x);}sortunique(A), sortunique(B);ll ans = 0;for (auto a : A){ll l = max(1LL, 1 - a), r = min(N, N - a);ans += r - l + 1;}for (auto b : B){ll l = max(1LL, b - N), r = min(N, b - 1);ans += r - l + 1;}vector<ll> B0, B1;for (auto b : B){if (b % 2 == 0)B0.push_back(b);elseB1.push_back(b);}for (auto a : A){auto &B2 = (a % 2 == 0 ? B0 : B1);ll l = lower_bound(B2.begin(), B2.end(), max(2 - a, 2 + a)) - B2.begin();ll r = upper_bound(B2.begin(), B2.end(), min(2 * N - a, 2 * N + a)) - B2.begin();ans -= r - l;}cout << ans << endl;}