Submission #887080

#	Time	Username	Problem	Language	Result	Execution time	Memory
887080		vjudge1	Solar Storm (NOI20_solarstorm)	C++14	36 / 100	167 ms	192676 KiB

SolarStorm

#include<bits/stdc++.h>

using namespace std;

#define int long long

const int N=1e6+1, LG=20;
int n, s, k, d[N], pos[N], v[N], nxt[LG][N], pf[N];

int32_t main(){
   ios_base::sync_with_stdio(false);
   cin.tie(nullptr);
   cin >> n >> s >> k;
   for (int i=1; i<n; ++i) cin >> d[i], pos[i+1]=pos[i]+d[i];
   for (int i=1; i<=n; ++i) cin >> v[i];
   partial_sum(v, v+n+1, pf);
   if (k==1 && *max_element(d+1, d+n)==2 && *min_element(d+1, d+n)==2){
      pair<int, int> ans={-1, -1};
      for (int i=1; i<=n; ++i){
         int j=min(n, i+s-1);
         ans=max(ans, {pf[j]-pf[i-1], i});
      }
      int i=ans.second, j=min(n, i+s-1);
      cout << (j-i+1) << '\n';
      for (int t=i; t<=j; ++t) cout << t << ' ';
      return 0;
   }
   for (int i=1; i<=n; ++i){
      nxt[0][i]=max(i, nxt[0][i-1]);
      while (nxt[0][i]<n && pos[nxt[0][i]+1]-pos[i]<=k) ++nxt[0][i];
   }
   for (int lg=1; lg<LG; ++lg){
      for (int i=n; i>=1; --i) nxt[lg][i]=nxt[lg-1][nxt[lg-1][i]];
   }
   auto jump=[&](int x, int t) -> int {
      t=min(t, n);
      for (int i=0; i<LG; ++i) if (t>>i&1) x=nxt[i][x];
      return x;
   };
   pair<int, int> ans={-1, -1};
   for (int i=1; i<=n; ++i){
      int cur=jump(i, s*2);
      ans=max(ans, {pf[cur]-pf[i-1], i});
   }
   vector<int> res;
   int cur=ans.second, cnt=s;
   while (cur!=n+1 && cnt--){
      res.push_back(nxt[0][cur]);
      cur=nxt[1][cur]+1;
   }
   cout << res.size() << '\n';
   for (int i:res) cout << i << ' ';
   return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 7 / 7
• Subtask 3: 11 / 11
• Subtask 4: 8 / 8
• Subtask 5: 0 / 18
• Subtask 6: 0 / 16
• Subtask 7: 0 / 30