Submission #476495

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
476495	2021-09-27 11:26:15	keta_tsimakuridze	Snake Escaping (JOI18_snake_escaping)	C++14	100 / 100	1186 ms	47436 KiB

snake_escaping

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#include<bits/stdc++.h>
#define f first
#define s second
////#define int long long
#define pii pair<int,int>
using namespace std;
const int N = 1048576 + 5, mod = 1e9 + 7; // !
int t,dp1[2][N],dp2[2][N],L,q,cnt[N];
main(){
      ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
            cin >> L >> q;
            string s;
            cin >> s;
            for(int i = 0; i < (1 << L); i++) { 
                        dp1[0][i] = s[i] - '0';
                        dp2[0][i] = s[i] - '0';
            
      }
      for(int j = 0; j < L; j++) {
        for(int i = 0; i < (1 << L); i++) {
                        dp1[1][i] = dp1[0][i];
                        if((1 << j) & i) dp1[1][i] += dp1[1][i ^ (1 << j)];         
        }
        swap(dp1[0],dp1[1]);
      } 
      for(int j = 0; j < L; j++) {
        for(int i = (1 << L) - 1; i >= 0; i--) {
                        dp2[1][i] = dp2[0][i];
                        if(!((1 << j) & i)) dp2[1][i] += dp2[1][i ^ (1 << j)];          
        }
 
 
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Compilation message (stderr)

snake_escaping.cpp:9:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    9 | main(){
      | ^~~~
snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:37:29: warning: unused variable 'x' [-Wunused-variable]
   37 |                         int x = 0;
      |                             ^

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 10 / 10
• Subtask 4: 53 / 53
• Subtask 5: 25 / 25