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Submission #637114

# Submission time Handle Problem Language Result Execution time Memory
637114 2022-08-31T15:15:15 Z Dec0Dedd DEL13 (info1cup18_del13) C++14
40 / 100
 22 ms 6236 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = 1e5+100;
int d[N], par[N][3], cnt[N], n, q;
bool dp[N][3], vis[N][3];

bool gen(int i, int l) {
   if (i == q) {
      if (l == 0) return true;
      return false;
   }

   int x=d[i]-l;
   if (x < 0) return false;

   if (vis[i][l]) return dp[i][l];
   vis[i][l]=true;

   if (x%2 == 0) {
      if ((x == 0 || l > 0) && gen(i+1, 0)) par[i][l]=0, dp[i][l]=true;
      if (x >= 2 && gen(i+1, 2)) par[i][l]=2, dp[i][l]=true;
   } else {
      if (gen(i+1, 1)) par[i][l]=1, dp[i][l]=true;
   }

   return dp[i][l];
}

void solve(int c) {
   cin>>n>>q;

   if (q == 0) {
      cout<<-1<<"\n";
      return;
   }

   for (int i=0; i<=n+10; ++i) d[i]=0, cnt[i]=0;
   for (int i=0; i<=n+10; ++i) {
      for (int j=0; j<3; ++j) dp[i][j]=vis[i][j]=false, par[i][j]=-1;
   }

   vector<int> v;
   v.push_back(0);
   for (int i=0; i<q; ++i) {
      int p; cin>>p;
      v.push_back(p);
   }
   q+=2, v.push_back(n+1);
   for (int i=1; i<q; ++i) d[i]=cnt[i]=v[i]-v[i-1]-1;
   bool ok=gen(1, 0);

   if (!ok) {
      cout<<-1<<"\n";
   } else {

      int l=0;
      for (int i=1; i<q; ++i) {
         int x=par[i][l];
         cnt[i]-=x, cnt[i+1]-=x;
         l=par[i][l];
      }

      vector<int> mv;
      for (int i=1; i<q; ++i) {
         int l=v[i-1], k=cnt[i]/2;
         assert(cnt[i]%2 == 0);
         int x=l+2;
         while (k--) mv.push_back(x); 
      }

      l=0;
      for (int i=1; i<q; ++i) {
         int x=par[i][l];
         while (x--) mv.push_back(v[i]);
         l=par[i][l];
      }

      cout<<mv.size()<<"\n";
      for (auto u : mv) cout<<u<<" ";
      cout<<"\n";
   }
}

int main() {
   int t, c=1; cin>>t;
   while (t--) solve(c++);
}

Subtask #1
6.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 212 KB Output is partially correct
2 Correct 1 ms 212 KB Output is partially correct

Subtask #2
6.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 212 KB Output is partially correct
2 Correct 1 ms 212 KB Output is partially correct
3 Correct 11 ms 340 KB Output is partially correct
4 Correct 12 ms 384 KB Output is partially correct

Subtask #3
6.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 468 KB Output is partially correct
2 Correct 5 ms 2516 KB Output is partially correct

Subtask #4
10.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 212 KB Output is partially correct
2 Correct 1 ms 212 KB Output is partially correct
3 Correct 11 ms 340 KB Output is partially correct
4 Correct 12 ms 384 KB Output is partially correct
5 Correct 2 ms 340 KB Output is partially correct
6 Correct 1 ms 340 KB Output is partially correct
7 Correct 1 ms 340 KB Output is partially correct

Subtask #5
12.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 212 KB Output is partially correct
2 Correct 1 ms 212 KB Output is partially correct
3 Correct 11 ms 340 KB Output is partially correct
4 Correct 12 ms 384 KB Output is partially correct
5 Correct 2 ms 340 KB Output is partially correct
6 Correct 1 ms 340 KB Output is partially correct
7 Correct 1 ms 340 KB Output is partially correct
8 Correct 16 ms 3172 KB Output is partially correct
9 Correct 18 ms 4204 KB Output is partially correct
10 Correct 16 ms 4324 KB Output is partially correct
11 Correct 22 ms 6236 KB Output is partially correct