結果
問題 | No.818 Dinner time |
ユーザー | kurarrr |
提出日時 | 2019-04-20 14:17:08 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 20 ms / 2,000 ms |
コード長 | 2,882 bytes |
コンパイル時間 | 2,100 ms |
コンパイル使用メモリ | 204,296 KB |
実行使用メモリ | 6,912 KB |
最終ジャッジ日時 | 2024-05-07 08:22:58 |
合計ジャッジ時間 | 3,405 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 1 ms
5,376 KB |
testcase_04 | AC | 1 ms
5,376 KB |
testcase_05 | AC | 1 ms
5,376 KB |
testcase_06 | AC | 1 ms
5,376 KB |
testcase_07 | AC | 1 ms
5,376 KB |
testcase_08 | AC | 2 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 1 ms
5,376 KB |
testcase_11 | AC | 2 ms
5,376 KB |
testcase_12 | AC | 2 ms
5,376 KB |
testcase_13 | AC | 2 ms
5,376 KB |
testcase_14 | AC | 2 ms
5,376 KB |
testcase_15 | AC | 2 ms
5,376 KB |
testcase_16 | AC | 1 ms
5,376 KB |
testcase_17 | AC | 17 ms
6,784 KB |
testcase_18 | AC | 12 ms
5,760 KB |
testcase_19 | AC | 13 ms
5,760 KB |
testcase_20 | AC | 17 ms
6,656 KB |
testcase_21 | AC | 14 ms
6,016 KB |
testcase_22 | AC | 12 ms
5,376 KB |
testcase_23 | AC | 15 ms
5,760 KB |
testcase_24 | AC | 20 ms
6,912 KB |
testcase_25 | AC | 14 ms
5,888 KB |
testcase_26 | AC | 12 ms
5,376 KB |
testcase_27 | AC | 18 ms
6,400 KB |
testcase_28 | AC | 15 ms
5,888 KB |
testcase_29 | AC | 19 ms
6,528 KB |
testcase_30 | AC | 16 ms
6,144 KB |
testcase_31 | AC | 18 ms
6,528 KB |
testcase_32 | AC | 14 ms
5,760 KB |
ソースコード
#ifdef DEBUG_IS_VALID #define DEB 1 #define _LIBCPP_DEBUG 0 #else #define DEB 0 #define NDEBUG #endif #include <bits/stdc++.h> #define ALL(g) (g).begin(),(g).end() #define REP(i, x, n) for(int i = x; i < n; i++) #define rep(i,n) REP(i,0,n) #define RREP(i, x, n) for(int i = x; i >= n; i--) #define rrep(i, n) RREP(i,n,0) #define pb push_back #pragma GCC optimize ("-O3") using namespace std; #define DUMPOUT cout #define dump(...) if(DEB) DUMPOUT<<" "<<#__VA_ARGS__<<" :["<<__LINE__<<":"<<__FUNCTION__<<"]"<<endl<<" "; if(DEB) dump_func(__VA_ARGS__) template<typename T1,typename T2>ostream& operator << (ostream& os, pair<T1,T2> p){cout << "(" << p.first << ", " << p.second << ")"; return os;} template<typename T>ostream& operator << (ostream& os, vector<T>& vec) { os << "{"; for (int i = 0; i<vec.size(); i++) os << vec[i] << (i + 1 == vec.size() ? "" : ", "); os << "}"; return os; } template<typename T>ostream& operator << (ostream& os, set<T>& st){cout << "{"; for(auto itr = st.begin(); itr != st.end(); itr++) cout << *itr << (next(itr)!=st.end() ? ", " : ""); cout << "}"; return os;} template<typename T1,typename T2>ostream& operator << (ostream& os, map<T1,T2> mp){cout << "{"; for(auto itr = mp.begin(); itr != mp.end(); itr++) cout << "(" << (itr->first) << ", " << (itr->second) << ")" << (next(itr)!=mp.end() ? "," : ""); cout << "}"; return os; } void dump_func(){DUMPOUT << endl;} template <class Head, class... Tail>void dump_func(Head&& head, Tail&&... tail){ DUMPOUT << head; if (sizeof...(Tail) == 0) { DUMPOUT << " "; } else { DUMPOUT << ", "; } dump_func(std::move(tail)...);} template<class T> inline bool chmax(T& a,T const& b){if(a>=b) return false; a=b; return true;} template<class T> inline bool chmin(T& a,T const& b){if(a<=b) return false; a=b; return true;} void _main(); int main(){ cin.tie(0); ios::sync_with_stdio(false); _main(); return 0;} using ll = long long; using P = pair<int,int>; using Pl = pair<ll,ll>; using vi = vector<int>; using vvi = vector<vi>; using vl = vector<ll>; using vvl = vector<vl>; const int mod=1e9+7,INF=1<<29; const double EPS=1e-5,PI=3.1415926535897932384626; const ll lmod = 1e9+7,LINF=1LL<<59; void _main(){ ll N; ll M; cin >> N >> M ; vl a(N),b(N); rep(i,N) cin >> a[i] >> b[i] ; vl s1(N+1),s2(N+1),ma(N+1,-LINF); rep(i,N){ ll a1,a2; if(a[i]<0){ if(b[i]<0){ if(M*a[i]<=b[i]) a1 = b[i]; else a1 = M*a[i]; }else{ a1 = b[i]; } }else{ if(b[i]<0){ a1 = M*a[i]; }else{ if(a[i]>=b[i]) a1 = M*a[i]; else a1 = (M-1)*a[i]+b[i]; } } a2 = max(a[i],b[i]); s1[i+1] = s1[i] + a1; s2[i+1] = s2[i] + a2; } // ma[i] = max_{i<j}(s2[j]) rrep(i,N-1){ ma[i] = max(ma[i+1],s2[i+1]); } ll ans = -LINF; rep(i,N){ chmax(ans,s1[i+1]-s2[i+1]+ma[i]); } cout << ans << endl; }