제출 #160126

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
160126		GioChkhaidze	Snake Escaping (JOI18_snake_escaping)	C++14	22 / 100	503 ms	65536 KiB

snake_escaping

#include <bits/stdc++.h>
using namespace std;
int n,q,C[(1<<21)],M[20],dp[2594323],ANS[1000006],Y[1000006],vs;
string S[1000006];
main () { 
	ios::sync_with_stdio(false);
	cin>>n>>q;
	
	M[0]=1;
	for (int i=1; i<=13; i++) 
		M[i]=M[i-1]*3;
	
	if (n<=13) {	
		
		for (int i=0; i<(1<<n); i++) {
			char c;
			cin>>c;
			C[i]=c-'0';
			
			int x=0;
			for (int j=0; j<n; j++) 
				if (i&(1<<j)) x+=M[j];
			dp[x]+=C[i];
		}
		
		for (int i=0; i<M[n]; i++) {
			int x=i;
			for (int j=n-1; j>=0; j--) 
				if (x-2*M[j]>=0) x-=2*M[j],dp[i]=(dp[i-2*M[j]]+dp[i-M[j]]);	
					else
				if (x-M[j]>=0) x-=M[j];
		}
		
		for (int i=1; i<=q; i++) {
			string s;
			int x=0;
			cin>>s;	
					
			for (int j=0; j<s.size(); j++) 
				if (s[s.size()-j-1]=='?') x+=2*M[j];	
					else
				if (s[s.size()-j-1]=='1') x+=M[j];
			
			printf("%d\n",dp[x]);
		}
	}
		else {
		for (int i=0; i<(1<<n); i++) {
			char c;
			cin>>c;
			C[i]=c-'0';
		}

		int K=(n-13);
		
		bool Bo[q][(1<<4)+2];
		
		for (int i=1; i<=q; i++) {
			cin>>S[i];	
			
			for (int k=S[i].size()-1; k>=K; k--) {
				if (S[i][k]=='?') Y[i]+=2*M[k-S[i].size()+1];	
					else
				if (S[i][k]=='1') Y[i]+=M[k-S[i].size()+1];
			}
			
			int Bit=0;
			for (int k=0; k<K; k++) 
				if (S[i][k]=='1') Bit+=(1<<k);

			for (int j=0; j<(1<<K); j++) 
				if (j&Bit==Bit) Bo[i][j]=1;
		}
		
		int Last2[M[13]+5];
		
		for (int i=0; i<M[13]; i++) {
			int x=i;
			
			Last2[i]=-1;
			
			for (int j=12; j>=0; j--) 
				if (x>=2*M[j]) { Last2[i]=j; break; }
						else
				if (x>=M[j]) x-=M[j];
		}
		 

		for (int i=0; i<(1<<K); i++) {
			for (int j=0; j<M[13]; j++)
				dp[j]=0;
			
			for (int j=0; j<(1<<13); j++) {
				int x=0;
				for (int k=0; k<13; k++) 
					if (i&(1<<k)) x+=M[k];
				dp[x]=C[i*(1<<13)+j];
			}
			
			for (int j=0; j<M[13]; j++) {
				int x=j;
				if (Last2[j]==-1) continue;
				dp[j]=(dp[j-2*M[Last2[j]]]+dp[j-M[Last2[j]]]);	
			}
			
			for (int j=1; j<=q; j++) {
				if (!Bo[j][i]) continue;
				ANS[j]+=dp[Y[j]];
			}
		}
		
		for (int i=1; i<=q; i++) 
			printf("%d\n",ANS[i]);		
	}
}

컴파일 시 표준 에러 (stderr) 메시지

snake_escaping.cpp:5:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main () { 
       ^
snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:39:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (int j=0; j<s.size(); j++) 
                  ~^~~~~~~~~
snake_escaping.cpp:72:14: warning: self-comparison always evaluates to true [-Wtautological-compare]
     if (j&Bit==Bit) Bo[i][j]=1;
           ~~~^~~~~
snake_escaping.cpp:72:14: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
snake_escaping.cpp:101:9: warning: unused variable 'x' [-Wunused-variable]
     int x=j;
         ^

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 10 / 10
• Subtask 4: 0 / 53
• Subtask 5: 0 / 25