Submission #719580

#	Time	Username	Problem	Language	Result	Execution time	Memory
719580		jamezzz	Kitchen (BOI19_kitchen)	C++17	100 / 100	291 ms	111436 KiB

kitchen

#include <bits/stdc++.h>
using namespace std;

#define sf scanf
#define pf printf
#define INF 1023456789
#define maxn 305

int n,m,k,a[maxn],b[maxn],memo[maxn][maxn*maxn+5];

int dp(int i,int num){
	if(num<0)return -INF;
	if(i==-1&&num==0)return 0;
	if(i==-1&&num!=0)return -INF;
	if(memo[i][num]!=-1)return memo[i][num];
	return memo[i][num]=max(dp(i-1,num),dp(i-1,num-b[i])+min(n,b[i]));
}

int main(){
	sf("%d%d%d",&n,&m,&k);
	int sm=0;
	for(int i=0;i<n;++i){
		sf("%d",&a[i]);
		if(a[i]<k){
			printf("Impossible\n");
			exit(0);
		}
		sm+=a[i];
	}
	int sm2=0;
	for(int i=0;i<m;++i){
		sf("%d",&b[i]);
		sm2+=b[i];
	}
	memset(memo,-1,sizeof memo);
	for(int i=sm;i<=sm2;++i){
		if(dp(m-1,i)>=n*k){
			printf("%d\n",i-sm);
			exit(0);
		}
	}
	printf("Impossible\n");
}

Compilation message (stderr)

kitchen.cpp: In function 'int main()':
kitchen.cpp:20:4: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |  sf("%d%d%d",&n,&m,&k);
      |    ^
kitchen.cpp:23:5: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |   sf("%d",&a[i]);
      |     ^
kitchen.cpp:32:5: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |   sf("%d",&b[i]);
      |     ^

• Subtask 1: 9 / 9
• Subtask 2: 22 / 22
• Subtask 3: 20 / 20
• Subtask 4: 21 / 21
• Subtask 5: 28 / 28