結果
問題 | No.818 Dinner time |
ユーザー | omochana2 |
提出日時 | 2019-04-19 21:57:55 |
言語 | C++11 (gcc 13.3.0) |
結果 |
AC
|
実行時間 | 23 ms / 2,000 ms |
コード長 | 2,352 bytes |
コンパイル時間 | 1,384 ms |
コンパイル使用メモリ | 158,584 KB |
実行使用メモリ | 7,296 KB |
最終ジャッジ日時 | 2024-11-29 23:26:52 |
合計ジャッジ時間 | 3,020 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 29 |
ソースコード
#include <bits/stdc++.h> #define ADD(a, b) a = (a + ll(b)) % mod #define MUL(a, b) a = (a * ll(b)) % mod #define MAX(a, b) a = max(a, b) #define MIN(a, b) a = min(a, b) #define rep(i, a, b) for(int i = int(a); i < int(b); i++) #define rer(i, a, b) for(int i = int(a) - 1; i >= int(b); i--) #define all(a) (a).begin(), (a).end() #define sz(v) (int)(v).size() #define pb push_back #define sec second #define fst first #define debug(fmt, ...) Debug(__LINE__, ":", fmt, ##__VA_ARGS__) using namespace std; typedef long long ll; typedef unsigned long long ull; typedef pair<int, int> pi; typedef pair<ll, ll> pl; typedef pair<int, pi> ppi; typedef vector<int> vi; typedef vector<ll> vl; typedef vector<vl> mat; typedef complex<double> comp; void Debug() {cerr << '\n'; } template<class FIRST, class... REST>void Debug(FIRST arg, REST... rest){ cerr<<arg<<" ";Debug(rest...);} template<class T>ostream& operator<<(ostream& out,const vector<T>& v) { out<<"[";if(!v.empty()){rep(i,0,sz(v)-1)out<<v[i]<<", ";out<<v.back();}out<<"]";return out;} template<class S, class T>ostream& operator<<(ostream& out,const pair<S, T>& v){ out<<"("<<v.first<<", "<<v.second<<")";return out;} const int MAX_N = 300010; const int MAX_V = 100010; const double eps = 1e-6; const ll mod = 1000000007; const int inf = 1 << 30; const ll linf = 1LL << 60; const double PI = 3.14159265358979323846; mt19937 rng; //use it by rng() % mod, shuffle(all(vec), rng) /////////////////////////////////////////////////////////////////////////////////////////////////// int N; int M; ll A[MAX_N], B[MAX_N]; ll F[MAX_N], O[MAX_N]; //[0, i) ll S[MAX_N]; void solve() { cin >> N >> M; rep(i, 0, N) cin >> A[i] >> B[i]; rep(i, 0, N) { F[i + 1] = max(A[i] * (M - 1) + max(A[i], B[i]), B[i]) + F[i]; O[i + 1] = max(A[i], B[i]) + O[i]; } S[N] = O[N]; rer(i, N, 0) { S[i] = max(S[i + 1], O[i]); } ll res = -linf; rep(i, 1, N + 1) { MAX(res, F[i] + S[i] - O[i]); } cout << res << "\n"; } int main() { #ifndef LOCAL ios::sync_with_stdio(false); cin.tie(0); #endif cout << fixed; cout.precision(20); cerr << fixed; cerr.precision(6); rng.seed((int)time(0)); #ifdef LOCAL //freopen("in.txt", "wt", stdout); //for tester freopen("in.txt", "rt", stdin); #endif solve(); cerr << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n"; return 0; }