제출 #33937

#제출 시각아이디문제언어결과실행 시간메모리
33937petil수열 (APIO14_sequence)C++14
컴파일 에러
0 ms0 KiB
#include <bits/stdc++.h> using namespace std; typedef long long ll; struct CHT{ struct line{ ll s, t; int idx; }; deque<line> que; bool ck(line L1, line L2, line me){ ///x1 = (L1.t-L2.t) /(L2.s-L1.s) ///x2 = (L2.t - me.t) / (me.s-L2.s) ///x1<x2 return (L1.t-L2.t) * (me.s-L2.s) < (L2.t-me.t) * (L2.s-L1.s) ; }   void push(line me){   while((int)que.size()>=2 && !ck(que[(int)que.size()-2], que.back(), me)){ que.pop_back(); } if(!que.empty() && que.back().s == me.s){ if(que.back().t>=me.t)return; que.pop_back();que.push_back(me); } else{ que.push_back(me); } } ll val(line li, ll x) { return li.s * x + li.t; } void Efront(ll x) { while((int)que.size()>=2 && !(val(que[0], x)>val(que[1], x))){ // if(que[1].idx == id)return; que.pop_front(); } } ll maxval(ll x){ return val(que[0], x); }   };   int n, k, A[100005]; ll s[100005], dp[100005][2]; int pre[100003][202]; void trace(int now, int j) { vector<int> tmp; while(1){ if(j==0)break; tmp.push_back(now); now = pre[now][j];--j; } for(int i=(int)tmp.size()-1; i>=0; i--) cout<<tmp[i]<<" "; } int main() { scanf("%d %d", &n, &k); for(int i=1; i<=n; i++){ scanf("%d", &A[i]); } for(int i=1; i<=n; i++){ s[i] = s[i-1] + A[i]; }     for(int j=1; j<=k; j++){ CHT cht; int pos = 0; int t = (j&1); for(int i=j; i<=n; i++){ cht.Efront(s[i]); cht.push({s[i-1], -s[i-1]*s[n] + dp[i-1][!t], i-1}); /// cht.Efront(s[i]); dp[i][t] = cht.maxval(s[i]) + s[i]*(s[n]-s[i]); pre[i][j] = cht.que[0].idx; }   } ll ans=-1, ed=-1; for(int i=k; i<=n; i++){ if(ans<dp[i][k&1]){ ans = dp[i][k&1];ed=i; } }   cout<<ans<<endl;   trace(ed, k); }

컴파일 시 표준 에러 (stderr) 메시지

sequence.cpp:17:1: error: stray '\302' in program
  
 ^
sequence.cpp:17:1: error: stray '\240' in program
sequence.cpp:19:1: error: stray '\302' in program
  
 ^
sequence.cpp:19:1: error: stray '\240' in program
sequence.cpp:45:1: error: stray '\302' in program
  
 ^
sequence.cpp:45:1: error: stray '\240' in program
sequence.cpp:47:1: error: stray '\302' in program
  
 ^
sequence.cpp:47:1: error: stray '\240' in program
sequence.cpp:71:1: error: stray '\302' in program
  
 ^
sequence.cpp:71:1: error: stray '\240' in program
sequence.cpp:72:1: error: stray '\302' in program
  
 ^
sequence.cpp:72:1: error: stray '\240' in program
sequence.cpp:84:1: error: stray '\302' in program
  
 ^
sequence.cpp:84:1: error: stray '\240' in program
sequence.cpp:92:1: error: stray '\302' in program
  
 ^
sequence.cpp:92:1: error: stray '\240' in program
sequence.cpp:94:1: error: stray '\302' in program
  
 ^
sequence.cpp:94:1: error: stray '\240' in program
sequence.cpp: In function 'int main()':
sequence.cpp:75:13: warning: unused variable 'pos' [-Wunused-variable]
         int pos = 0;
             ^
sequence.cpp:64:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &k);
                           ^
sequence.cpp:66:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &A[i]);
                           ^