Submission #1101404

#	Time	Username	Problem	Language	Result	Execution time	Memory
1101404		quocthang	K blocks (IZhO14_blocks)	C++14	53 / 100	16 ms	17024 KiB

blocks

#include <bits/stdc++.h>
#define base 31
#define fi first
#define endl "\n"
#define se second
#define NAME "FILE"
#define ll long long
//#define int long long
#define mod 1000000007
#define pii pair<int,int>
#define bit(mask,i) (mask&(1<<i))
#define lcm(a,b) ((a*b)/__gcd(a,b))
#define turn_on(mask,i) (mask|(1<<i))
#define turn_off(mask,i) (mask^(1<<i))

template <class T1, class T2>
bool maximize(T1 &a, T2 b){if (a < b){a = b; return 1;} return 0;}

template <class T1, class T2>
bool minimize(T1 &a, T2 b){if (a > b){a = b; return 1;} return 0;}

template <class T1, class T2>
void add(T1 &a, T2 b){a += b; if (a >= mod) a -= mod;}

template <class T1, class T2>
void sub(T1 &a, T2 b){a -= b; if (a < 0) a += mod;}

using namespace std;
int n,k,dp[1010][1010],a[100010]; 
int mx[100010][20];
int get(int l,int r){
	int k=__lg(r-l+1);
	return max(mx[l][k],mx[r-(1<<k)+1][k]);
}
signed main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);cout.tie(NULL);
	if (fopen(NAME".inp","r")){
		freopen(NAME".inp","r",stdin);
		freopen(NAME".out","w",stdout);
	}
	cin>>n>>k;
	for(int i=1;i<=n;i++)cin>>a[i],mx[i][0]=a[i];
	for(int j=1;(1<<j)<=n;j++){
		for(int i=1;i+(1<<j)-1<=n;i++){
			mx[i][j]=max(mx[i][j-1],mx[i+(1<<(j-1))][j-1]);
		}
	}
	memset(dp,0x3f,sizeof dp);
	dp[0][0]=0;
	for(int j=1;j<=k;j++){
		for(int i=1;i<=n;i++){
			for(int k=1;k<=i;k++){
				minimize(dp[i][j],dp[k-1][j-1]+get(k,i));
			}
		}
	}
	cout<<dp[n][k];
}

Compilation message (stderr)

blocks.cpp: In function 'int main()':
blocks.cpp:39:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |   freopen(NAME".inp","r",stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
blocks.cpp:40:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |   freopen(NAME".out","w",stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 14 / 14
• Subtask 2: 18 / 18
• Subtask 3: 21 / 21
• Subtask 4: 0 / 47