oj.uz

Submission #853362

# Submission time Handle Problem Language Result Execution time Memory
853362 2023-09-24T08:38:47 Z anhduc2701 Snake Escaping (JOI18_snake_escaping) C++17
0 / 100
 3 ms 2396 KB 
#include<bits/stdc++.h>
#define pb push_back
#define fi first
#define se second 
#define BIT(x,i) (((x)>>(i))&1)
using namespace std;
typedef long long ll;
int dp[1<<20];
int dp1[1<<20];
int l,q;
int sum=0;
string a;
signed main(){
	freopen("input.inp","r",stdin);
	freopen("output.out","w",stdout);
	cin.tie(0),cout.tie(0)->sync_with_stdio(0);
	cin >> l >> q;
	cin >> a;
	for(int i=0;i<(1<<l);i++){
		int num=a[i]-'0';
		dp[i]=num;
		dp1[i]=num;
	}
	for(int i=0;i<l;i++){
		for(int j=0;j<(1<<l);j++){
			if((1<<i)&j)dp[j]+=dp[j^(1<<i)];
			else dp1[j]+=dp1[j^(1<<i)];
		}
	}
	for(int i=1;i<=q;i++){
		string s;
		cin >> s;
		int mask0=0;
		int num0=0,num1=0,num2=0,mask1=0,mask2=0;
		int sum=0;
		for(int j=0;j<l;j++){
			if(s[l-1-j]=='?'){
				mask2^=(1<<j);
				num2++;
			}
			if(s[l-1-j]=='0'){
				mask0^=(1<<j);
				num0++;
			}
			if(s[l-1-j]=='1'){
				mask1^=(1<<j);
				num1++;
			}
		}
		if(num0<=min(num1,num2)){
			for(int j=mask0;j>=0;j=(j-1)&mask0){
				if(__builtin_popcount(j)%2==0){
					sum+=dp1[mask1^j];
				}
				else{
					sum-=dp1[mask1^j];
				}
				if(j==0)break;
			}

		}
		else if(num1<=min(num0,num2)){
			for(int j=mask1;j>=0;j=(j-1)&mask1){
				if(__builtin_popcount(j)&1==0){
					sum+=dp[j^mask2];
				}
				else{
					sum-=dp[j^mask2];
				}
				if(j==0)break;
			}
		}
		else{
			for(int j=mask2;j>=0;j=(j-1)&mask2){	
				sum+=a[j^mask1]-'0';
				if(j==0)break;
			}
		}
		cout << sum << '\n';
	}
}

Compilation message

snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:64:31: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
   64 |     if(__builtin_popcount(j)&1==0){
      |                              ~^~~
snake_escaping.cpp:14:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |  freopen("input.inp","r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
snake_escaping.cpp:15:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |  freopen("output.out","w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 53.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -