oj.uz

Submission #705393

# Submission time Handle Problem Language Result Execution time Memory
705393 2023-03-04T09:42:41 Z 089487 Snake Escaping (JOI18_snake_escaping) C++14
22 / 100
 2000 ms 20000 KB 
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,popcnt,sse4,abm")
#include<bits/stdc++.h>
#define quick ios::sync_with_stdio(0);cin.tie(0);
#define rep(x,a,b) for(int x=a;x<=b;x++)
#define repd(x,a,b) for(int x=a;x>=b;x--)
#define lowbit(x) (x&-x)
#define sz(x) (int)(x.size())
#define F first
#define S second
#define all(x) x.begin(),x.end()
#define mp make_pair
#define eb emplace_back
using namespace std;
typedef complex<int> P;
#define X real()
#define Y imag()
typedef pair<int,int> pii;
void debug(){
    cout<<"\n";
}
template <class T,class ... U >
void debug(T a, U ... b){
    cout<<a<<" ",debug(b...);
}
const int M=20;
const int N=(1<<M)+7;
const int INF=1e18;
int dp1[N];
int dp2[N];
int a[N];
int now=0;
int ans=0;
string s;
void dfs(int x,int n){
	if(x>=n){
		ans+=a[now];
		return ;
	}
	if(s[x]=='0'||s[x]=='?'){
		dfs(x+1,n);
	}
	if(s[x]=='1'||s[x]=='?'){
		now+=(1<<x);
		dfs(x+1,n);
		now-=(1<<x);
	}
}
int change=0;
void dfs2(int x,int n){
	if(x>=n){
		if(change) ans-=dp1[now];
		else ans+=dp1[now];
		return ;
	}
	if(s[x]=='1'){
		now+=(1<<x);
		dfs2(x+1,n);
		now-=(1<<x);
		change^=1;
		dfs2(x+1,n);
		change^=1;
	}
	else if(s[x]=='?'){
		now+=(1<<x);
		dfs2(x+1,n);
		now-=(1<<x);
	}
	else{
		dfs2(x+1,n);
	}
}

void dfs3(int x,int n){
	if(x>=n){
		if(change) ans-=dp2[now];
		else ans+=dp2[now];
		return ;
	}
	if(s[x]=='0'){
		change^=1;
		now+=(1<<x);
		dfs3(x+1,n);
		change^=1;
		now-=(1<<x);
		dfs3(x+1,n);
	}
	else if(s[x]=='?'){
		dfs3(x+1,n);
	}
	else{
		now+=(1<<x);
		dfs3(x+1,n);
		now-=(1<<x);
	}
}

signed main(){
	quick
	int n,q;
	cin>>n>>q;
	string S;
	cin>>S;
	rep(i,0,(1<<n)-1){
		dp1[i]=dp2[i]=a[i]=S[i]-'0';
	}
	rep(i,0,n-1){
		rep(mask,0,(1<<n)-1){
			if(mask&(1<<i)){
				dp1[mask]+=dp1[mask^(1<<i)];
			}
			else dp2[mask]+=dp2[mask^(1<<i)];
		}
	}
	while(q--){
		cin>>s;
		reverse(all(s));
		int a,b,c;
		for(char _c:s){
			if(_c=='?') a++;
			else if(_c=='1') b++;
			else c++;
		}
		ans=change=now=0;
		if(a<=min(b,c)){
			dfs(0,n);
		}
		else if(b<=min(a,c)){
			dfs2(0,n);
		}
		else{
			dfs3(0,n);
		}
		cout<<ans<<"\n";
	}

	return 0;
}

Compilation message

snake_escaping.cpp:28:15: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+18' to '2147483647' [-Woverflow]
   28 | const int INF=1e18;
      |               ^~~~
snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:118:11: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized]
  118 |   int a,b,c;
      |           ^
snake_escaping.cpp:118:9: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
  118 |   int a,b,c;
      |         ^
snake_escaping.cpp:118:7: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized]
  118 |   int a,b,c;
      |       ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 252 ms 15032 KB Output is correct
12 Correct 303 ms 14668 KB Output is correct
13 Correct 581 ms 13908 KB Output is correct
14 Correct 604 ms 14048 KB Output is correct
15 Correct 370 ms 15136 KB Output is correct
16 Correct 518 ms 14272 KB Output is correct
17 Correct 642 ms 14284 KB Output is correct
18 Correct 186 ms 16028 KB Output is correct
19 Correct 295 ms 13028 KB Output is correct
20 Correct 273 ms 14652 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 252 ms 15032 KB Output is correct
12 Correct 303 ms 14668 KB Output is correct
13 Correct 581 ms 13908 KB Output is correct
14 Correct 604 ms 14048 KB Output is correct
15 Correct 370 ms 15136 KB Output is correct
16 Correct 518 ms 14272 KB Output is correct
17 Correct 642 ms 14284 KB Output is correct
18 Correct 186 ms 16028 KB Output is correct
19 Correct 295 ms 13028 KB Output is correct
20 Correct 273 ms 14652 KB Output is correct
21 Correct 291 ms 18300 KB Output is correct
22 Correct 479 ms 18336 KB Output is correct
23 Correct 974 ms 17272 KB Output is correct
24 Correct 1032 ms 17256 KB Output is correct
25 Correct 551 ms 19224 KB Output is correct
26 Correct 856 ms 17528 KB Output is correct
27 Correct 1135 ms 17548 KB Output is correct
28 Correct 183 ms 20000 KB Output is correct
29 Correct 429 ms 16076 KB Output is correct
30 Correct 320 ms 18404 KB Output is correct
31 Correct 764 ms 18104 KB Output is correct
32 Correct 825 ms 18028 KB Output is correct
33 Correct 589 ms 16972 KB Output is correct
34 Correct 1158 ms 17028 KB Output is correct
35 Correct 1173 ms 17536 KB Output is correct
36 Correct 242 ms 16024 KB Output is correct
37 Correct 399 ms 18004 KB Output is correct
38 Correct 545 ms 16168 KB Output is correct
39 Correct 789 ms 17268 KB Output is correct
40 Correct 877 ms 17180 KB Output is correct

Subtask #4
0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 43 ms 15980 KB Output is correct
12 Correct 1348 ms 16264 KB Output is correct
13 Correct 821 ms 16124 KB Output is correct
14 Correct 191 ms 16000 KB Output is correct
15 Correct 69 ms 16064 KB Output is correct
16 Correct 143 ms 15976 KB Output is correct
17 Correct 279 ms 15980 KB Output is correct
18 Correct 46 ms 16160 KB Output is correct
19 Correct 899 ms 15928 KB Output is correct
20 Correct 48 ms 16032 KB Output is correct
21 Correct 117 ms 16112 KB Output is correct
22 Correct 155 ms 15908 KB Output is correct
23 Correct 96 ms 15976 KB Output is correct
24 Correct 282 ms 15944 KB Output is correct
25 Correct 325 ms 15980 KB Output is correct
26 Correct 37 ms 15856 KB Output is correct
27 Correct 470 ms 16112 KB Output is correct
28 Execution timed out 2011 ms 16140 KB Time limit exceeded
29 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 252 ms 15032 KB Output is correct
12 Correct 303 ms 14668 KB Output is correct
13 Correct 581 ms 13908 KB Output is correct
14 Correct 604 ms 14048 KB Output is correct
15 Correct 370 ms 15136 KB Output is correct
16 Correct 518 ms 14272 KB Output is correct
17 Correct 642 ms 14284 KB Output is correct
18 Correct 186 ms 16028 KB Output is correct
19 Correct 295 ms 13028 KB Output is correct
20 Correct 273 ms 14652 KB Output is correct
21 Correct 291 ms 18300 KB Output is correct
22 Correct 479 ms 18336 KB Output is correct
23 Correct 974 ms 17272 KB Output is correct
24 Correct 1032 ms 17256 KB Output is correct
25 Correct 551 ms 19224 KB Output is correct
26 Correct 856 ms 17528 KB Output is correct
27 Correct 1135 ms 17548 KB Output is correct
28 Correct 183 ms 20000 KB Output is correct
29 Correct 429 ms 16076 KB Output is correct
30 Correct 320 ms 18404 KB Output is correct
31 Correct 764 ms 18104 KB Output is correct
32 Correct 825 ms 18028 KB Output is correct
33 Correct 589 ms 16972 KB Output is correct
34 Correct 1158 ms 17028 KB Output is correct
35 Correct 1173 ms 17536 KB Output is correct
36 Correct 242 ms 16024 KB Output is correct
37 Correct 399 ms 18004 KB Output is correct
38 Correct 545 ms 16168 KB Output is correct
39 Correct 789 ms 17268 KB Output is correct
40 Correct 877 ms 17180 KB Output is correct
41 Correct 43 ms 15980 KB Output is correct
42 Correct 1348 ms 16264 KB Output is correct
43 Correct 821 ms 16124 KB Output is correct
44 Correct 191 ms 16000 KB Output is correct
45 Correct 69 ms 16064 KB Output is correct
46 Correct 143 ms 15976 KB Output is correct
47 Correct 279 ms 15980 KB Output is correct
48 Correct 46 ms 16160 KB Output is correct
49 Correct 899 ms 15928 KB Output is correct
50 Correct 48 ms 16032 KB Output is correct
51 Correct 117 ms 16112 KB Output is correct
52 Correct 155 ms 15908 KB Output is correct
53 Correct 96 ms 15976 KB Output is correct
54 Correct 282 ms 15944 KB Output is correct
55 Correct 325 ms 15980 KB Output is correct
56 Correct 37 ms 15856 KB Output is correct
57 Correct 470 ms 16112 KB Output is correct
58 Execution timed out 2011 ms 16140 KB Time limit exceeded
59 Halted 0 ms 0 KB -