Submission #337557

#	Time	Username	Problem	Language	Result	Execution time	Memory
337557		Kerim	Bank (IZhO14_bank)	C++17	100 / 100	216 ms	89068 KiB

bank

#include "bits/stdc++.h"
#define MAXN 100009
#define INF 1000000007
#define mp(x,y) make_pair(x,y)
#define all(v) v.begin(),v.end()
#define pb(x) push_back(x)
#define wr cout<<"----------------"<<endl;
#define ppb() pop_back()
#define tr(ii,c) for(__typeof((c).begin()) ii=(c).begin();ii!=(c).end();ii++)
#define ff first
#define ss second
#define my_little_dodge 46
#define debug(x)  cerr<< #x <<" = "<< x<<endl;
using namespace std;

typedef long long ll;
typedef pair<int,int> PII;
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
int dp[20][1<<20];
vector<int>adj[1024];
int a[20],b[20];
int rec(int pos,int mask){
	if(pos<0)
		return 1;
	int &ret=dp[pos][mask];
	if(~ret)
		return ret;
	tr(it,adj[a[pos]])	
		if(!(mask&(*it)) and rec(pos-1,mask^(*it)))
			return ret=1;
	/*
	for(int sub=mask;sub;--sub,sub&=mask)
		if(cost[sub]==a[pos] and rec(pos-1,mask^sub))
			return ret=1;
	*/
	return ret=0;	
}
int main(){
  //  freopen("file.in", "r", stdin);
	int n,m;
	scanf("%d%d",&n,&m);
	for(int i=0;i<n;i++)
		scanf("%d",a+i);
	for(int i=0;i<m;i++)
		scanf("%d",b+i);
	for(int i=0;i<(1<<m);i++){
		int sum=0;
		for(int j=0;j<m;j++)
			if(i>>j&1)
				sum+=b[j];
		if(sum<=1000)
			adj[sum].pb(i);
	}
	memset(dp,-1,sizeof dp);
	if(rec(n-1,0))
		puts("YES");
	else
		puts("NO");
	return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:42:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   42 |  scanf("%d%d",&n,&m);
      |  ~~~~~^~~~~~~~~~~~~~
bank.cpp:44:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   44 |   scanf("%d",a+i);
      |   ~~~~~^~~~~~~~~~
bank.cpp:46:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   46 |   scanf("%d",b+i);
      |   ~~~~~^~~~~~~~~~

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