Submission #1113362

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1113362	2024-11-16 12:30:17	vjudge1	Snake Escaping (JOI18_snake_escaping)	C++17	75 / 100	2077 ms	23136 KiB

snake_escaping

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#include "bits/stdc++.h"
#define F first
#define S second
#define ll long long
#define pii pair<ll,int>
const int mxN = (1 << 20) + 5;
const int mod = 1e9 + 7;
using namespace std;
int sos[mxN][2][2];
signed main(){
 ios_base::sync_with_stdio(0);
 cin.tie(0);
 cout.tie(0);
  int n,q;
  cin >>n>>q;
  string s;
  cin>>s;
  for(int i = 0;i < n;i++){
    for(int mask = 0;mask < (1 << n);mask++){
      if(!i){
        sos[mask][0][0] = s[mask] - '0';
        if(mask % 2) sos[mask][0][0] += s[mask - 1] - '0';
        sos[mask][0][1] = s[mask] - '0';
        if(mask % 2 == 0) sos[mask][0][1] += s[mask + 1] - '0';
        continue;
      }
      sos[mask][i % 2][0] = sos[mask][(i - 1)%2][0];
      sos[mask][i % 2][1] = sos[mask][(i - 1)%2][1];
      if(mask >> i & 1) sos[mask][(i)%2][0] += sos[mask - (1 << i)][(i - 1)%2][0];
      else sos[mask][i % 2][1] += sos[mask + (1 << i)][(i - 1)%2][1];
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 10 / 10
• Subtask 4: 53 / 53
• Subtask 5: 0 / 25