Submission #1027673

#	Time	Username	Problem	Language	Result	Execution time	Memory
1027673		mansur	Flooding Wall (BOI24_wall)	C++17	25 / 100	5088 ms	456 KiB

Main

#include<bits/stdc++.h>

using namespace std;

#define rall(s) s.rbegin(), s.rend()
#define all(s) s.begin(), s.end()
#define sz(s) (int)s.size()
#define s second
#define f first

using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int N = 1e6, mod = 1e9 + 7;
const int inf = 1e9;

void solve() {
	int n;
	cin >> n;
	int a[n + 1][2];
	for (int i = 1; i <= n; i++) cin >> a[i][0];
	for (int i = 1; i <= n; i++) cin >> a[i][1];
	for (int i = 1; i <= n; i++) {
		if (a[i][1] < a[i][0]) swap(a[i][1], a[i][0]);	
	}
	int ans = 0;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j < i; j++) {
		    for (int k = i + 1; k <= n; k++) {
		  		for (int x = 0; x < 2; x++) {
					for (int y = 0; y < 2; y++) {
						int v = 1;
						for (int s = 1; s <= n; s++) {
							if (s == i || s == j || s == k) continue;
							int cnt = 0;
							if (s < i) {
								if (s < j) {
									if (a[s][1] < a[j][x]) cnt = 2;
									else if (a[s][0] < a[j][x]) cnt = 1;
									else cnt = 0;
								}else {
									if (a[s][1] <= a[j][x]) cnt = 2;
									else if (a[s][0] <= a[j][x]) cnt = 1;
									else cnt = 0;
								}
							}else {
								if (s > k) {
									if (a[s][1] < a[k][y]) cnt = 2;
									else if (a[s][0] < a[k][y]) cnt = 1;
									else cnt = 0;
								}else {
									if (a[s][1] <= a[k][y]) cnt = 2;
									else if (a[s][0] <= a[k][y]) cnt = 1;
									else cnt = 0;
								}
							}
							v = (v * cnt) % mod;
						}
						if (!v) continue;
						for (int z = 0; z < 2; z++) {
							if (a[i][z] > a[j][x] || a[i][z] > a[k][y]) continue;
							ans = (ans + ((min(a[j][x], a[k][y]) - a[i][z]) * 1ll * v) % mod) % mod;
						}
		  			}
			  	}
		    }
		}	
	}
	cout << ans;
}

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	solve();
}

• Subtask 1: 8 / 8
• Subtask 2: 17 / 17
• Subtask 3: 0 / 19
• Subtask 4: 0 / 14
• Subtask 5: 0 / 12
• Subtask 6: 0 / 30