Submission #495932

#	Time	Username	Problem	Language	Result	Execution time	Memory
495932		ntabc05101	Bali Sculptures (APIO15_sculpture)	C++14	100 / 100	142 ms	348 KiB

sculpture

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

#define taskname ""

const int lgN = 41;

int main() {
	if (fopen(taskname".inp", "r")) {
		freopen(taskname".inp", "r", stdin);
		freopen(taskname".out", "w", stdout);
	}
	else {
		if (fopen(taskname".in", "r")) {
			freopen(taskname".in", "r", stdin);
			freopen(taskname".out", "w", stdout);
		}
	}

	cin.tie(0)->sync_with_stdio(0);

	int n, a, b; cin >> n >> a >> b;
	long long y[n + 1];
	y[0] = 0;
	for (int i = 1; i <= n; i++) {
		cin >> y[i]; y[i] += y[i - 1];
	}

	long long res = 0;
	if (n > 100) {
		pair<bool, int> dp[n + 1];
		for (int x = lgN - 1; ~x; x--) {
			dp[0] = {1, 0};
			for (int i = 1; i <= n; i++) {
				dp[i] = {0, 0};
				for (int j = i - 1; ~j; j--) {
					if ((res >> x) == (((y[i] - y[j]) | res) >> x)) {
						dp[i] = max(dp[i], dp[j]);
					}
				}
				dp[i].second--;
			}
			if (!dp[n].first || -dp[n].second > b) {
				res |= 1ll << x;
			}
		}

		cout << res << "\n";
	}
	else {
		bool dp[n + 1][n + 1];
		for (int x = lgN - 1; ~x; x--) {
			memset(dp, 0, sizeof(dp));
			dp[0][0] = 1;
			for (int i = 1; i <= n; i++) {
				for (int k = i - 1; ~k; k--) {
					if ((res >> x) == (((y[i] - y[k]) | res) >> x)) {
						for (int j = 1; j <= i; j++) {
							dp[i][j] |= dp[k][j - 1];
						}
					}
				}
			}
	
			int chk = 1;
			for (int j = a; j <= b; j++) {
				if (dp[n][j]) {
					chk = 0; break;
				}
			}
			if (chk) {
				res |= 1ll << x;
			}
		}

		cout << res << "\n";
	}

	return 0;
}

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:10:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |   freopen(taskname".inp", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:11:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |   freopen(taskname".out", "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:15:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |    freopen(taskname".in", "r", stdin);
      |    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:16:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |    freopen(taskname".out", "w", stdout);
      |    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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