Submission #102015

#	Time	Username	Problem	Language	Result	Execution time	Memory
102015		Nicholas_Patrick	Bali Sculptures (APIO15_sculpture)	C++17	100 / 100	78 ms	512 KiB

sculpture

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

int n, a, b;
vector <long long> y, psy;
vector <int> memo;
int depth;
int checkPossibility(long long x, long long toDeduct=0, int checkFrom=0){
	if(checkFrom==n)
		return 0;
	if(memo[checkFrom])
		return memo[checkFrom];
	int ret=n;
	int curres;
	for(int i = checkFrom;i < n;i ++){
		if(((psy[i]-toDeduct)|x)==x){
			depth++;
			curres=checkPossibility(x, psy[i], i+1);
			if(curres+depth>=a)
				ret=min(ret, curres);
			depth--;
		}
		if(psy[i]-toDeduct>x)
			break;
	}
	return memo[checkFrom]=ret+1;
}
int main(){
	scanf("%d %d %d", &n, &a, &b);
	y.resize(n);
	psy.resize(n);
	for(int i = 0;i < n;i ++)
		scanf("%lld", &y[i]);
	psy[0]=y[0];
	for(int i = 1;i < n;i ++)
		psy[i]=psy[i-1]+y[i];
	long long check=0x1FFFFFFFFFF;
	for(int i = 40;i >= 0;i --){
		memo.clear();
		memo.resize(n, 0);
		depth=0;
		if(checkPossibility(check-(1ll<<i))<=b)
			check-=1ll<<i;
	}
	printf("%lld\n", check);
}

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:29:7: 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:33:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld", &y[i]);
   ~~~~~^~~~~~~~~~~~~~~

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