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Submission #548607

# Submission time Handle Problem Language Result Execution time Memory
548607 2022-04-13T22:28:00 Z MilosMilutinovic Snake Escaping (JOI18_snake_escaping) C++14
22 / 100
 974 ms 29920 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++){
		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 286 ms 12876 KB Output is correct
2 Correct 265 ms 12768 KB Output is correct
3 Correct 347 ms 12720 KB Output is correct
4 Correct 259 ms 12880 KB Output is correct
5 Correct 301 ms 12764 KB Output is correct
6 Correct 289 ms 12736 KB Output is correct
7 Correct 268 ms 12788 KB Output is correct
8 Correct 296 ms 12768 KB Output is correct
9 Correct 264 ms 12688 KB Output is correct
10 Correct 272 ms 12696 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 286 ms 12876 KB Output is correct
2 Correct 265 ms 12768 KB Output is correct
3 Correct 347 ms 12720 KB Output is correct
4 Correct 259 ms 12880 KB Output is correct
5 Correct 301 ms 12764 KB Output is correct
6 Correct 289 ms 12736 KB Output is correct
7 Correct 268 ms 12788 KB Output is correct
8 Correct 296 ms 12768 KB Output is correct
9 Correct 264 ms 12688 KB Output is correct
10 Correct 272 ms 12696 KB Output is correct
11 Correct 473 ms 25904 KB Output is correct
12 Correct 504 ms 25796 KB Output is correct
13 Correct 521 ms 24828 KB Output is correct
14 Correct 559 ms 24896 KB Output is correct
15 Correct 546 ms 25864 KB Output is correct
16 Correct 510 ms 25032 KB Output is correct
17 Correct 529 ms 25068 KB Output is correct
18 Correct 541 ms 26940 KB Output is correct
19 Correct 563 ms 23912 KB Output is correct
20 Correct 459 ms 25508 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 286 ms 12876 KB Output is correct
2 Correct 265 ms 12768 KB Output is correct
3 Correct 347 ms 12720 KB Output is correct
4 Correct 259 ms 12880 KB Output is correct
5 Correct 301 ms 12764 KB Output is correct
6 Correct 289 ms 12736 KB Output is correct
7 Correct 268 ms 12788 KB Output is correct
8 Correct 296 ms 12768 KB Output is correct
9 Correct 264 ms 12688 KB Output is correct
10 Correct 272 ms 12696 KB Output is correct
11 Correct 473 ms 25904 KB Output is correct
12 Correct 504 ms 25796 KB Output is correct
13 Correct 521 ms 24828 KB Output is correct
14 Correct 559 ms 24896 KB Output is correct
15 Correct 546 ms 25864 KB Output is correct
16 Correct 510 ms 25032 KB Output is correct
17 Correct 529 ms 25068 KB Output is correct
18 Correct 541 ms 26940 KB Output is correct
19 Correct 563 ms 23912 KB Output is correct
20 Correct 459 ms 25508 KB Output is correct
21 Correct 492 ms 28400 KB Output is correct
22 Correct 580 ms 28564 KB Output is correct
23 Correct 581 ms 27596 KB Output is correct
24 Correct 634 ms 27440 KB Output is correct
25 Correct 508 ms 29216 KB Output is correct
26 Correct 602 ms 27672 KB Output is correct
27 Correct 576 ms 27524 KB Output is correct
28 Correct 527 ms 29920 KB Output is correct
29 Correct 552 ms 25976 KB Output is correct
30 Correct 491 ms 27792 KB Output is correct
31 Correct 618 ms 27292 KB Output is correct
32 Correct 614 ms 27308 KB Output is correct
33 Correct 550 ms 26080 KB Output is correct
34 Correct 627 ms 25976 KB Output is correct
35 Correct 610 ms 26216 KB Output is correct
36 Correct 522 ms 24992 KB Output is correct
37 Correct 532 ms 26936 KB Output is correct
38 Correct 583 ms 25208 KB Output is correct
39 Correct 576 ms 26348 KB Output is correct
40 Correct 585 ms 26496 KB Output is correct

Subtask #4
0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 286 ms 12876 KB Output is correct
2 Correct 265 ms 12768 KB Output is correct
3 Correct 347 ms 12720 KB Output is correct
4 Correct 259 ms 12880 KB Output is correct
5 Correct 301 ms 12764 KB Output is correct
6 Correct 289 ms 12736 KB Output is correct
7 Correct 268 ms 12788 KB Output is correct
8 Correct 296 ms 12768 KB Output is correct
9 Correct 264 ms 12688 KB Output is correct
10 Correct 272 ms 12696 KB Output is correct
11 Incorrect 974 ms 25380 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 286 ms 12876 KB Output is correct
2 Correct 265 ms 12768 KB Output is correct
3 Correct 347 ms 12720 KB Output is correct
4 Correct 259 ms 12880 KB Output is correct
5 Correct 301 ms 12764 KB Output is correct
6 Correct 289 ms 12736 KB Output is correct
7 Correct 268 ms 12788 KB Output is correct
8 Correct 296 ms 12768 KB Output is correct
9 Correct 264 ms 12688 KB Output is correct
10 Correct 272 ms 12696 KB Output is correct
11 Correct 473 ms 25904 KB Output is correct
12 Correct 504 ms 25796 KB Output is correct
13 Correct 521 ms 24828 KB Output is correct
14 Correct 559 ms 24896 KB Output is correct
15 Correct 546 ms 25864 KB Output is correct
16 Correct 510 ms 25032 KB Output is correct
17 Correct 529 ms 25068 KB Output is correct
18 Correct 541 ms 26940 KB Output is correct
19 Correct 563 ms 23912 KB Output is correct
20 Correct 459 ms 25508 KB Output is correct
21 Correct 492 ms 28400 KB Output is correct
22 Correct 580 ms 28564 KB Output is correct
23 Correct 581 ms 27596 KB Output is correct
24 Correct 634 ms 27440 KB Output is correct
25 Correct 508 ms 29216 KB Output is correct
26 Correct 602 ms 27672 KB Output is correct
27 Correct 576 ms 27524 KB Output is correct
28 Correct 527 ms 29920 KB Output is correct
29 Correct 552 ms 25976 KB Output is correct
30 Correct 491 ms 27792 KB Output is correct
31 Correct 618 ms 27292 KB Output is correct
32 Correct 614 ms 27308 KB Output is correct
33 Correct 550 ms 26080 KB Output is correct
34 Correct 627 ms 25976 KB Output is correct
35 Correct 610 ms 26216 KB Output is correct
36 Correct 522 ms 24992 KB Output is correct
37 Correct 532 ms 26936 KB Output is correct
38 Correct 583 ms 25208 KB Output is correct
39 Correct 576 ms 26348 KB Output is correct
40 Correct 585 ms 26496 KB Output is correct
41 Incorrect 974 ms 25380 KB Output isn't correct
42 Halted 0 ms 0 KB -