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Submission #548483

# Submission time Handle Problem Language Result Execution time Memory
548483 2022-04-13T14:05:19 Z MilosMilutinovic Snake Escaping (JOI18_snake_escaping) C++17
75 / 100
 2000 ms 42664 KB 
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
const int N=(1<<20)+5;
const int M=1594327;
const int Q=1000050;
int l,n,q,a[N],lst[M],pw[20],ans[Q],dp[M],msk[N],qmask[Q],omask[Q],qv[Q];
char s[N],qs[25];
void calc(){
	pw[0]=1;
	for(int i=1;i<14;i++)pw[i]=pw[i-1]*3;
	for(int i=0;i<M;i++){
		vector<int> bits;
		int x=i;
		while(x>0)bits.push_back(x%3),x/=3;
		lst[i]=-1;
		for(int j=0;j<bits.size();j++)if(bits[j]==2)lst[i]=j;
	}
}
void BruteForce(){
	memset(dp,0,sizeof *dp);
	for(int i=0;i<n;i++){
		int sum=0,x=i,b=0;
		while(x>0)sum+=(x%2)*pw[b++],x/=2;
		dp[sum]+=(int)(s[i]-'0');
	}
	for(int i=0;i<M;i++)if(lst[i]!=-1){
		dp[i]+=dp[i-2*pw[lst[i]]];
		dp[i]+=dp[i-pw[lst[i]]];
	}
	while(q--){
		scanf("%s",qs);
		int sum=0;
		for(int i=0;i<l;i++)sum+=(qs[i]=='0'?0:(qs[i]=='1'?1:2))*pw[l-i-1];
		printf("%i\n",dp[sum]);
	}
}
int main(){
	scanf("%i%i",&l,&q);
	scanf("%s",s);
	n=(1<<l),calc();
	for(int i=0;i<n;i++)a[i]=(int)(s[i]-'0');
	if(l<=13){
		BruteForce();
		return 0;
	}
	for(int i=0;i<n;i++){
		vector<int> bits;
		int x=i;
		while(x>0)bits.pb(x%2),x/=2;
		while(bits.size()<l)bits.pb(0);
		reverse(bits.begin(),bits.end());
		msk[i]=0;
		for(int j=7;j<l;j++)msk[i]+=bits[j]*pw[j-7];
	}
	for(int i=1;i<=q;i++){
		scanf("%s",qs);
		qv[i]=0;
		for(int j=7;j<l;j++)qv[i]+=(qs[j]=='0'?0:(qs[j]=='1'?1:2))*pw[j-7];
		qmask[i]=0;
		for(int b=0;b<7;b++)if(qs[b]!='0')qmask[i]+=(1<<(6-b));
		for(int b=0;b<7;b++)if(qs[b]=='1')omask[i]+=(1<<(6-b));
	}
	int nsz=(1<<(l-7));
	for(int i=0;i<128;i++){
		memset(dp,0,M*sizeof *dp);
		for(int j=0;j<nsz;j++)dp[msk[(i<<(l-7))+j]]+=a[(i<<(l-7))+j];
		for(int j=0;j<M;j++)if(lst[j]!=-1){
			dp[j]+=dp[j-2*pw[lst[j]]];
			dp[j]+=dp[j-pw[lst[j]]];
		}
		for(int j=1;j<=q;j++)if((qmask[j]&i)==i&&(omask[j]|i)==i)ans[j]+=dp[qv[j]];
	}
	for(int i=1;i<=q;i++)printf("%i\n",ans[i]);
	return 0;
}

Compilation message

snake_escaping.cpp: In function 'void calc()':
snake_escaping.cpp:17:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |   for(int j=0;j<bits.size();j++)if(bits[j]==2)lst[i]=j;
      |               ~^~~~~~~~~~~~
snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:51:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   51 |   while(bits.size()<l)bits.pb(0);
      |         ~~~~~~~~~~~^~
snake_escaping.cpp: In function 'void BruteForce()':
snake_escaping.cpp:32:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |   scanf("%s",qs);
      |   ~~~~~^~~~~~~~~
snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:39:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |  scanf("%i%i",&l,&q);
      |  ~~~~~^~~~~~~~~~~~~~
snake_escaping.cpp:40:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |  scanf("%s",s);
      |  ~~~~~^~~~~~~~
snake_escaping.cpp:57:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |   scanf("%s",qs);
      |   ~~~~~^~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 276 ms 12768 KB Output is correct
2 Correct 279 ms 12704 KB Output is correct
3 Correct 287 ms 12724 KB Output is correct
4 Correct 278 ms 12688 KB Output is correct
5 Correct 289 ms 12716 KB Output is correct
6 Correct 276 ms 12760 KB Output is correct
7 Correct 294 ms 12876 KB Output is correct
8 Correct 284 ms 12728 KB Output is correct
9 Correct 278 ms 12720 KB Output is correct
10 Correct 286 ms 12760 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 276 ms 12768 KB Output is correct
2 Correct 279 ms 12704 KB Output is correct
3 Correct 287 ms 12724 KB Output is correct
4 Correct 278 ms 12688 KB Output is correct
5 Correct 289 ms 12716 KB Output is correct
6 Correct 276 ms 12760 KB Output is correct
7 Correct 294 ms 12876 KB Output is correct
8 Correct 284 ms 12728 KB Output is correct
9 Correct 278 ms 12720 KB Output is correct
10 Correct 286 ms 12760 KB Output is correct
11 Correct 502 ms 18508 KB Output is correct
12 Correct 550 ms 18212 KB Output is correct
13 Correct 485 ms 17580 KB Output is correct
14 Correct 488 ms 17588 KB Output is correct
15 Correct 478 ms 18488 KB Output is correct
16 Correct 472 ms 17688 KB Output is correct
17 Correct 488 ms 17392 KB Output is correct
18 Correct 461 ms 19260 KB Output is correct
19 Correct 488 ms 16280 KB Output is correct
20 Correct 450 ms 17944 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 276 ms 12768 KB Output is correct
2 Correct 279 ms 12704 KB Output is correct
3 Correct 287 ms 12724 KB Output is correct
4 Correct 278 ms 12688 KB Output is correct
5 Correct 289 ms 12716 KB Output is correct
6 Correct 276 ms 12760 KB Output is correct
7 Correct 294 ms 12876 KB Output is correct
8 Correct 284 ms 12728 KB Output is correct
9 Correct 278 ms 12720 KB Output is correct
10 Correct 286 ms 12760 KB Output is correct
11 Correct 502 ms 18508 KB Output is correct
12 Correct 550 ms 18212 KB Output is correct
13 Correct 485 ms 17580 KB Output is correct
14 Correct 488 ms 17588 KB Output is correct
15 Correct 478 ms 18488 KB Output is correct
16 Correct 472 ms 17688 KB Output is correct
17 Correct 488 ms 17392 KB Output is correct
18 Correct 461 ms 19260 KB Output is correct
19 Correct 488 ms 16280 KB Output is correct
20 Correct 450 ms 17944 KB Output is correct
21 Correct 489 ms 18656 KB Output is correct
22 Correct 511 ms 18048 KB Output is correct
23 Correct 523 ms 16972 KB Output is correct
24 Correct 523 ms 16896 KB Output is correct
25 Correct 496 ms 18832 KB Output is correct
26 Correct 529 ms 17272 KB Output is correct
27 Correct 545 ms 17384 KB Output is correct
28 Correct 465 ms 19912 KB Output is correct
29 Correct 516 ms 15776 KB Output is correct
30 Correct 465 ms 17996 KB Output is correct
31 Correct 505 ms 17704 KB Output is correct
32 Correct 529 ms 17636 KB Output is correct
33 Correct 479 ms 16620 KB Output is correct
34 Correct 533 ms 16672 KB Output is correct
35 Correct 548 ms 16956 KB Output is correct
36 Correct 470 ms 15636 KB Output is correct
37 Correct 509 ms 17596 KB Output is correct
38 Correct 513 ms 15712 KB Output is correct
39 Correct 520 ms 16972 KB Output is correct
40 Correct 511 ms 16728 KB Output is correct

Subtask #4
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 276 ms 12768 KB Output is correct
2 Correct 279 ms 12704 KB Output is correct
3 Correct 287 ms 12724 KB Output is correct
4 Correct 278 ms 12688 KB Output is correct
5 Correct 289 ms 12716 KB Output is correct
6 Correct 276 ms 12760 KB Output is correct
7 Correct 294 ms 12876 KB Output is correct
8 Correct 284 ms 12728 KB Output is correct
9 Correct 278 ms 12720 KB Output is correct
10 Correct 286 ms 12760 KB Output is correct
11 Correct 933 ms 23416 KB Output is correct
12 Correct 966 ms 23040 KB Output is correct
13 Correct 929 ms 23244 KB Output is correct
14 Correct 935 ms 23332 KB Output is correct
15 Correct 1008 ms 23376 KB Output is correct
16 Correct 1025 ms 23320 KB Output is correct
17 Correct 1020 ms 23244 KB Output is correct
18 Correct 987 ms 23252 KB Output is correct
19 Correct 1061 ms 23140 KB Output is correct
20 Correct 1059 ms 23324 KB Output is correct
21 Correct 1136 ms 23324 KB Output is correct
22 Correct 1048 ms 23196 KB Output is correct
23 Correct 1126 ms 23192 KB Output is correct
24 Correct 1037 ms 23196 KB Output is correct
25 Correct 1014 ms 23200 KB Output is correct
26 Correct 920 ms 23212 KB Output is correct
27 Correct 937 ms 23240 KB Output is correct
28 Correct 959 ms 23072 KB Output is correct
29 Correct 965 ms 23400 KB Output is correct
30 Correct 941 ms 23204 KB Output is correct
31 Correct 1018 ms 23148 KB Output is correct
32 Correct 960 ms 23176 KB Output is correct
33 Correct 950 ms 22980 KB Output is correct
34 Correct 918 ms 22732 KB Output is correct
35 Correct 958 ms 22908 KB Output is correct
36 Correct 943 ms 23012 KB Output is correct
37 Correct 947 ms 22952 KB Output is correct
38 Correct 996 ms 23056 KB Output is correct
39 Correct 951 ms 23096 KB Output is correct
40 Correct 960 ms 23024 KB Output is correct

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 276 ms 12768 KB Output is correct
2 Correct 279 ms 12704 KB Output is correct
3 Correct 287 ms 12724 KB Output is correct
4 Correct 278 ms 12688 KB Output is correct
5 Correct 289 ms 12716 KB Output is correct
6 Correct 276 ms 12760 KB Output is correct
7 Correct 294 ms 12876 KB Output is correct
8 Correct 284 ms 12728 KB Output is correct
9 Correct 278 ms 12720 KB Output is correct
10 Correct 286 ms 12760 KB Output is correct
11 Correct 502 ms 18508 KB Output is correct
12 Correct 550 ms 18212 KB Output is correct
13 Correct 485 ms 17580 KB Output is correct
14 Correct 488 ms 17588 KB Output is correct
15 Correct 478 ms 18488 KB Output is correct
16 Correct 472 ms 17688 KB Output is correct
17 Correct 488 ms 17392 KB Output is correct
18 Correct 461 ms 19260 KB Output is correct
19 Correct 488 ms 16280 KB Output is correct
20 Correct 450 ms 17944 KB Output is correct
21 Correct 489 ms 18656 KB Output is correct
22 Correct 511 ms 18048 KB Output is correct
23 Correct 523 ms 16972 KB Output is correct
24 Correct 523 ms 16896 KB Output is correct
25 Correct 496 ms 18832 KB Output is correct
26 Correct 529 ms 17272 KB Output is correct
27 Correct 545 ms 17384 KB Output is correct
28 Correct 465 ms 19912 KB Output is correct
29 Correct 516 ms 15776 KB Output is correct
30 Correct 465 ms 17996 KB Output is correct
31 Correct 505 ms 17704 KB Output is correct
32 Correct 529 ms 17636 KB Output is correct
33 Correct 479 ms 16620 KB Output is correct
34 Correct 533 ms 16672 KB Output is correct
35 Correct 548 ms 16956 KB Output is correct
36 Correct 470 ms 15636 KB Output is correct
37 Correct 509 ms 17596 KB Output is correct
38 Correct 513 ms 15712 KB Output is correct
39 Correct 520 ms 16972 KB Output is correct
40 Correct 511 ms 16728 KB Output is correct
41 Correct 933 ms 23416 KB Output is correct
42 Correct 966 ms 23040 KB Output is correct
43 Correct 929 ms 23244 KB Output is correct
44 Correct 935 ms 23332 KB Output is correct
45 Correct 1008 ms 23376 KB Output is correct
46 Correct 1025 ms 23320 KB Output is correct
47 Correct 1020 ms 23244 KB Output is correct
48 Correct 987 ms 23252 KB Output is correct
49 Correct 1061 ms 23140 KB Output is correct
50 Correct 1059 ms 23324 KB Output is correct
51 Correct 1136 ms 23324 KB Output is correct
52 Correct 1048 ms 23196 KB Output is correct
53 Correct 1126 ms 23192 KB Output is correct
54 Correct 1037 ms 23196 KB Output is correct
55 Correct 1014 ms 23200 KB Output is correct
56 Correct 920 ms 23212 KB Output is correct
57 Correct 937 ms 23240 KB Output is correct
58 Correct 959 ms 23072 KB Output is correct
59 Correct 965 ms 23400 KB Output is correct
60 Correct 941 ms 23204 KB Output is correct
61 Correct 1018 ms 23148 KB Output is correct
62 Correct 960 ms 23176 KB Output is correct
63 Correct 950 ms 22980 KB Output is correct
64 Correct 918 ms 22732 KB Output is correct
65 Correct 958 ms 22908 KB Output is correct
66 Correct 943 ms 23012 KB Output is correct
67 Correct 947 ms 22952 KB Output is correct
68 Correct 996 ms 23056 KB Output is correct
69 Correct 951 ms 23096 KB Output is correct
70 Correct 960 ms 23024 KB Output is correct
71 Correct 1507 ms 42664 KB Output is correct
72 Correct 1522 ms 39060 KB Output is correct
73 Correct 1633 ms 41228 KB Output is correct
74 Correct 1845 ms 41620 KB Output is correct
75 Execution timed out 2079 ms 42260 KB Time limit exceeded
76 Halted 0 ms 0 KB -