Submission #698170

#	Time	Username	Problem	Language	Result	Execution time	Memory
698170		BidoTeima	Go (COCI18_go)	C++17	50 / 100	1099 ms	157588 KiB

go

#include <iostream>
#include <vector>
using namespace std; 
int dp[105][105][2005][2];
int a[105], b[105], t[105];
int n, k, m;
int cost(int i, int j, bool onWho, bool toWho) {
	//to i - 1
	if (!toWho) { 
		if (i == 0)return -1;
		if (!onWho) {
			return a[i] - a[i - 1];
		}
		return a[j] - a[i - 1];
	}
	// to j + 1
	if (j == m - 1)return -1;
	if (!onWho) {
		return a[j + 1] - a[i];
	}
	return a[j + 1] - a[j];
}
int main()
{ 
	cin >> n >> k >> m; 
	for (int i = 0; i < m; i++)
		cin >> a[i] >> b[i] >> t[i];
	for (int i = 0; i < m; i++) {
		for (int j = 0; j < m; j++) {
			for (int k = 0; k < 2005; k++) {
				dp[i][j][k][0] = dp[i][j][k][1] =  - 1e9;
			}
		}
	}
	int nearest_left = 0, nearest_right = 0;
	for (int i = 0; i < m && a[i] <= k; i++) {
		nearest_left = i;
	}
	for (int i = m - 1; i >= 0 && a[i] >= k; i--) {
		nearest_right = i;
	}
	int dist = k - a[nearest_left];

	dp[nearest_left][nearest_left][dist][1] = 
	dp[nearest_left][nearest_left][dist][0] = (dist < t[nearest_left] ? b[nearest_left] : 0);
	
	dist = a[nearest_right] - k;

	dp[nearest_right][nearest_right][dist][1] =
	dp[nearest_right][nearest_right][dist][0] = (dist < t[nearest_right] ? b[nearest_right] : 0);
	int ans = 0;
	for (int aaa = 0; aaa < 10; aaa++)for (int i = 0; i < m; i++) {
		for (int j = i; j < m; j++) {
			for (int curTime = 0; curTime < 2003; curTime++) {
				for (int on = 0; on < 2; on++) {
					ans = max(ans, dp[i][j][curTime][on]);
					// 0 means on i, 1 means on j
					// option 1: transition to [i - 1][j] 
					int v = cost(i, j, on, 0);
					if (i > 0 && curTime + v <= 2003) {
						int tot = curTime + v;
						dp[i - 1][j][tot][0] =
							dp[i][j][curTime][on] + (tot < t[i - 1] ? b[i - 1] : 0);
						ans = max(ans, dp[i - 1][j][tot][0]);
					}
					// option 2: transition to [i][j + 1]
					v = cost(i, j, on, 1);
					if (j < m - 1 && curTime + v <= 2003) {
						int tot = curTime + v;
						dp[i][j + 1][tot][1] =
							dp[i][j][curTime][on] + (tot < t[j + 1] ? b[j + 1] : 0);
						ans = max(ans, dp[i][j + 1][tot][1]);
					}
				}
			}
		}
	}
	cout << ans;
	return 0;
}

• Subtask 1: 50 / 100