Submission #43937

#	Time	Username	Problem	Language	Result	Execution time	Memory
43937		Kerim	Bali Sculptures (APIO15_sculpture)	C++17	100 / 100	144 ms	16508 KiB

sculpture

#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;}
const int N=2005;
int dp[N][N],pd[N];
ll par[N];
int n,a,b;
int f(int pos,int comp,ll mask){
	if(comp>b)
		return 0;
	if(pos>n)
		return (a<=comp);
	int &ret=dp[pos][comp];
	if(~ret)
		return ret;ret=0;
	for(int i=pos;i<=n;i++){
		ll sum=par[i]-par[pos-1];
		if((mask&sum)==sum and f(i+1,comp+1,mask))
			return ret=1;
	}return ret;
}
int f1(int pos,ll mask){
	if(pos>n)
		return 0;
	int &ret=pd[pos];
	if(~ret)
		return ret;ret=INF;
	for(int i=pos;i<=n;i++){
		ll sum=par[i]-par[pos-1];
		if((mask&sum)==sum)
			umin(ret,f1(i+1,mask)+1);
	}	
	return ret;
}
int main(){
    //~ freopen("file.in", "r", stdin);
    scanf("%d%d%d",&n,&a,&b);
    for(int i=1;i<=n;i++){
		int x;
		scanf("%d",&x);
		par[i]=par[i-1]+x;
	}
	ll ans=(1LL<<45)-1;	
	if(a>1){
		for(int i=44;i>=0;i--){
			memset(dp,-1,sizeof dp);
			if(f(1,0,ans-(1LL<<i)))
				ans-=(1LL<<i);
		}
	}
	else{
		for(int i=44;i>=0;i--){
			memset(pd,-1,sizeof pd);
			if(f1(1,ans-(1LL<<i))<=b)
				ans-=(1LL<<i);
		}
	}
	printf("%lld\n",ans);
	return 0;
}

Compilation message (stderr)

sculpture.cpp: In function 'int f(int, int, ll)':
sculpture.cpp:30:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  if(~ret)
  ^~
sculpture.cpp:31:14: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   return ret;ret=0;
              ^~~
sculpture.cpp: In function 'int f1(int, ll)':
sculpture.cpp:42:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  if(~ret)
  ^~
sculpture.cpp:43:14: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   return ret;ret=INF;
              ^~~
sculpture.cpp: In function 'int main()':
sculpture.cpp:53:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d",&n,&a,&b);
     ~~~~~^~~~~~~~~~~~~~~~~~~
sculpture.cpp:56:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&x);
   ~~~~~^~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 21 / 21
• Subtask 4: 25 / 25
• Subtask 5: 29 / 29