Submission #2505151

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pp;
typedef pair<ll,ll> pll;
void read(int& x){ scanf("%d",&x); }
void read(ll& x){ scanf("%lld",&x); }
template<typename T,typename... Args>
void read(T& a,Args&... b){ read(a); read(b...); }
#define all(x) (x).begin(),(x).end()
#define pb push_back
#define eb emplace_back
#define x first
#define y second

int n, k;

int a[2010];

int dp[2010][2010];
int dp2[2010][2010];

int main()
{
	read(n, k);
	for(int as=0, i=1; i<=n; ++i){
		{int t; read(t); a[i] = t;}
		for(int j=1; j<=i; ++j){
			int d = dp[i-1][j];
			if(j == i) d = 2e9;
			
			int pd = dp[i-1][j-1];
			if(pd != int(2e9)){
				int nx = (as ? pd*a[i]/as : 0) + 1;
 				if(nx <= a[i]){
					d = min(d, pd + nx);
				}
			}
			dp[i][j] = d;
		}
		as += a[i];
	}	
	reverse(a+1, a+n+1);
	for(int as=0, i=2; i<=n; ++i){
		for(int j=1; j<i; ++j){
			int d = dp2[i-1][j];
			if(j == i-1) d = 2e9;
			
			int pd = dp2[i-1][j-1];
			if(pd != int(2e9)){
				int nx = (as ? pd*a[i]/as : 0) + 1;
 				if(nx <= a[i]){
					d = min(d, pd + nx);
				}
			}
			dp2[i][j] = d;
		}
		as += a[i];
	}
	
	int as = accumulate(a+1, a+n+1, 0);
	if(as == k){
		puts("1");
		return 0;
	}
	for(int i=n; 0<=i; --i){
		if(dp[n][i] <= k){
			if(dp2[n][i-1] <= as-k){
				printf("%d\n", i);
				break;
			}
		}
	}
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘void read(int&)’:
./Main.cpp:6:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
 void read(int& x){ scanf("%d",&x); }
                                  ^
./Main.cpp: In function ‘void read(ll&)’:
./Main.cpp:7:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
 void read(ll& x){ scanf("%lld",&x); }
                                   ^

Judge Result