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Submission #548419

# Submission time Handle Problem Language Result Execution time Memory
548419 2022-04-13T10:20:31 Z MilosMilutinovic Snake Escaping (JOI18_snake_escaping) C++14
22 / 100
 959 ms 24164 KB 
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
const int N=(1<<20)+5;
const int M=1600050;
const int Q=1000050;
int l,n,q,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();
	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);
		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<<b);
		for(int b=0;b<7;b++)if(qs[b]=='1')omask[i]+=(1<<b);
	}
	for(int i=0;i<128;i++){
		for(int j=0;j<M;j++)dp[j]=0;
		for(int j=0;j<(1<<(l-7));j++)dp[msk[(j<<7)+i]]+=(int)(s[(j<<7)+i]-'0');
		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:18:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |   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:33:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |   scanf("%s",qs);
      |   ~~~~~^~~~~~~~~
snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:40:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |  scanf("%i%i",&l,&q);
      |  ~~~~~^~~~~~~~~~~~~~
snake_escaping.cpp:41:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |  scanf("%s",s);
      |  ~~~~~^~~~~~~~
snake_escaping.cpp:56:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   56 |   scanf("%s",qs);
      |   ~~~~~^~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 272 ms 12712 KB Output is correct
2 Correct 269 ms 12736 KB Output is correct
3 Correct 314 ms 12824 KB Output is correct
4 Correct 271 ms 12740 KB Output is correct
5 Correct 278 ms 12884 KB Output is correct
6 Correct 281 ms 12736 KB Output is correct
7 Correct 268 ms 12712 KB Output is correct
8 Correct 285 ms 12744 KB Output is correct
9 Correct 272 ms 12744 KB Output is correct
10 Correct 281 ms 12760 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 272 ms 12712 KB Output is correct
2 Correct 269 ms 12736 KB Output is correct
3 Correct 314 ms 12824 KB Output is correct
4 Correct 271 ms 12740 KB Output is correct
5 Correct 278 ms 12884 KB Output is correct
6 Correct 281 ms 12736 KB Output is correct
7 Correct 268 ms 12712 KB Output is correct
8 Correct 285 ms 12744 KB Output is correct
9 Correct 272 ms 12744 KB Output is correct
10 Correct 281 ms 12760 KB Output is correct
11 Correct 451 ms 22144 KB Output is correct
12 Correct 498 ms 21728 KB Output is correct
13 Correct 516 ms 20956 KB Output is correct
14 Correct 518 ms 21076 KB Output is correct
15 Correct 548 ms 21984 KB Output is correct
16 Correct 489 ms 21292 KB Output is correct
17 Correct 515 ms 21112 KB Output is correct
18 Correct 480 ms 22980 KB Output is correct
19 Correct 511 ms 19956 KB Output is correct
20 Correct 484 ms 21704 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 272 ms 12712 KB Output is correct
2 Correct 269 ms 12736 KB Output is correct
3 Correct 314 ms 12824 KB Output is correct
4 Correct 271 ms 12740 KB Output is correct
5 Correct 278 ms 12884 KB Output is correct
6 Correct 281 ms 12736 KB Output is correct
7 Correct 268 ms 12712 KB Output is correct
8 Correct 285 ms 12744 KB Output is correct
9 Correct 272 ms 12744 KB Output is correct
10 Correct 281 ms 12760 KB Output is correct
11 Correct 451 ms 22144 KB Output is correct
12 Correct 498 ms 21728 KB Output is correct
13 Correct 516 ms 20956 KB Output is correct
14 Correct 518 ms 21076 KB Output is correct
15 Correct 548 ms 21984 KB Output is correct
16 Correct 489 ms 21292 KB Output is correct
17 Correct 515 ms 21112 KB Output is correct
18 Correct 480 ms 22980 KB Output is correct
19 Correct 511 ms 19956 KB Output is correct
20 Correct 484 ms 21704 KB Output is correct
21 Correct 478 ms 22128 KB Output is correct
22 Correct 573 ms 22344 KB Output is correct
23 Correct 570 ms 21352 KB Output is correct
24 Correct 514 ms 21100 KB Output is correct
25 Correct 539 ms 23236 KB Output is correct
26 Correct 589 ms 21692 KB Output is correct
27 Correct 579 ms 21524 KB Output is correct
28 Correct 512 ms 24164 KB Output is correct
29 Correct 545 ms 20140 KB Output is correct
30 Correct 524 ms 22600 KB Output is correct
31 Correct 552 ms 22380 KB Output is correct
32 Correct 543 ms 22432 KB Output is correct
33 Correct 560 ms 21392 KB Output is correct
34 Correct 565 ms 21796 KB Output is correct
35 Correct 580 ms 22380 KB Output is correct
36 Correct 464 ms 21044 KB Output is correct
37 Correct 539 ms 23220 KB Output is correct
38 Correct 535 ms 21344 KB Output is correct
39 Correct 523 ms 22604 KB Output is correct
40 Correct 541 ms 22552 KB Output is correct

Subtask #4
0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 272 ms 12712 KB Output is correct
2 Correct 269 ms 12736 KB Output is correct
3 Correct 314 ms 12824 KB Output is correct
4 Correct 271 ms 12740 KB Output is correct
5 Correct 278 ms 12884 KB Output is correct
6 Correct 281 ms 12736 KB Output is correct
7 Correct 268 ms 12712 KB Output is correct
8 Correct 285 ms 12744 KB Output is correct
9 Correct 272 ms 12744 KB Output is correct
10 Correct 281 ms 12760 KB Output is correct
11 Incorrect 959 ms 20744 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 272 ms 12712 KB Output is correct
2 Correct 269 ms 12736 KB Output is correct
3 Correct 314 ms 12824 KB Output is correct
4 Correct 271 ms 12740 KB Output is correct
5 Correct 278 ms 12884 KB Output is correct
6 Correct 281 ms 12736 KB Output is correct
7 Correct 268 ms 12712 KB Output is correct
8 Correct 285 ms 12744 KB Output is correct
9 Correct 272 ms 12744 KB Output is correct
10 Correct 281 ms 12760 KB Output is correct
11 Correct 451 ms 22144 KB Output is correct
12 Correct 498 ms 21728 KB Output is correct
13 Correct 516 ms 20956 KB Output is correct
14 Correct 518 ms 21076 KB Output is correct
15 Correct 548 ms 21984 KB Output is correct
16 Correct 489 ms 21292 KB Output is correct
17 Correct 515 ms 21112 KB Output is correct
18 Correct 480 ms 22980 KB Output is correct
19 Correct 511 ms 19956 KB Output is correct
20 Correct 484 ms 21704 KB Output is correct
21 Correct 478 ms 22128 KB Output is correct
22 Correct 573 ms 22344 KB Output is correct
23 Correct 570 ms 21352 KB Output is correct
24 Correct 514 ms 21100 KB Output is correct
25 Correct 539 ms 23236 KB Output is correct
26 Correct 589 ms 21692 KB Output is correct
27 Correct 579 ms 21524 KB Output is correct
28 Correct 512 ms 24164 KB Output is correct
29 Correct 545 ms 20140 KB Output is correct
30 Correct 524 ms 22600 KB Output is correct
31 Correct 552 ms 22380 KB Output is correct
32 Correct 543 ms 22432 KB Output is correct
33 Correct 560 ms 21392 KB Output is correct
34 Correct 565 ms 21796 KB Output is correct
35 Correct 580 ms 22380 KB Output is correct
36 Correct 464 ms 21044 KB Output is correct
37 Correct 539 ms 23220 KB Output is correct
38 Correct 535 ms 21344 KB Output is correct
39 Correct 523 ms 22604 KB Output is correct
40 Correct 541 ms 22552 KB Output is correct
41 Incorrect 959 ms 20744 KB Output isn't correct
42 Halted 0 ms 0 KB -