Submission #68459

#	Time	Username	Problem	Language	Result	Execution time	Memory
68459		yusufake	Bank (IZhO14_bank)	C++98	100 / 100	222 ms	14844 KiB

bank

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 1e3+3;

#define pb push_back
vector < int > V[N];
bool H[20][1<<20];
int A[N],B[N],T[N*20],n,m,i,j,t,ans;

void f(int i, int m){
    if(ans) return;
    if(i == n) { ans = 1; return; }
    if(H[i][m]) return;
    H[i][m] = 1;
    int j, x = A[i];
    for(j=0;j<V[x].size();j++){
        if((V[x][j] & m) == V[x][j])
            f(i+1,(m^V[x][j]));
    }                   
}                       
                        
int main(){
    scanf("%d%d",&n,&m);
    for(i=0;i<n;i++) { scanf("%d",&A[i]); T[ A[i] ] = 1; }
    for(i=0;i<m;i++) scanf("%d",&B[i]);
                        
    for(i=1;i<(1<<m);i++){
        t = 0;          
        for(j=0;j<m;j++)    
            if(i & (1 << j))    
                t += B[j];          
        if(!T[t]) continue;             
        V[t].pb(i);                         
    }                                           
                                                        
    ans = 0;                                                        
    f(0,(1<<m)-1);                                                      
    puts(ans ? "YES" : "NO");                                           
    return 0;     
}                   

Compilation message (stderr)

bank.cpp: In function 'void f(int, int)':
bank.cpp:17:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(j=0;j<V[x].size();j++){
             ~^~~~~~~~~~~~
bank.cpp: In function 'int main()':
bank.cpp:24:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&m);
     ~~~~~^~~~~~~~~~~~~~
bank.cpp:25:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(i=0;i<n;i++) { scanf("%d",&A[i]); T[ A[i] ] = 1; }
                        ~~~~~^~~~~~~~~~~~
bank.cpp:26:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(i=0;i<m;i++) scanf("%d",&B[i]);
                      ~~~~~^~~~~~~~~~~~

• Subtask 1: 19 / 19
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 29 / 29