Submission #101239

#	Time	Username	Problem	Language	Result	Execution time	Memory
101239		arman_ferdous	Bali Sculptures (APIO15_sculpture)	C++17	0 / 100	155 ms	16248 KiB

sculpture

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

using ll = long long;
const int N = 2010;
int n, A, B;
ll a[N], sum[N], mask, diff;

int dp4[N][N], dp5[N];
int DP4(int pos, int parts) {
	if(pos > n) {
		if(A <= parts && parts <= B) return 1;
		return 0;
	} if(parts > B) return 0;
	if(dp4[pos][parts] != -1) return dp4[pos][parts];

	int &ret = dp4[pos][parts]; ret = 0;
	ll s = 0;
	for(int i = pos; i <= n; i++) {
		s += a[i];
		if((mask ^ s) < diff) ret |= DP4(i+1, parts+1);
	}
	return ret;
}

int main() {
	scanf("%d %d %d", &n, &A, &B);
	for(int i = 1; i <= n; i++) {
		scanf("%lld", &a[i]);
		sum[i] = sum[i-1] + a[i];
	}
	if(n <= 110) {
		for(int i = 42; i >= 0; i--) {
			memset(dp4, -1, sizeof dp4);
			diff = (1ll<<i);
			if(!DP4(1,0)) mask |= (1ll<<i);
		}
		printf("%lld\n", mask);
		return 0;
	}
}

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:27:7: 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:29:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld", &a[i]);
   ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 16
• Subtask 3: 0 / 21
• Subtask 4: 0 / 25
• Subtask 5: 0 / 29