Submission #962583

#	Time	Username	Problem	Language	Result	Execution time	Memory
962583		starchan	Raisins (IOI09_raisins)	C++17	100 / 100	123 ms	57716 KiB

raisins

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define in pair<int, int>
#define f first
#define s second
#define pb push_back
#define pob pop_back
#define INF (int)1e17
#define fast() ios_base::sync_with_stdio(false); cin.tie(NULL)

const int MX = 52;

int a[MX][MX];
int dp[MX][MX][MX][MX];

int C(int lx, int rx, int ly, int ry)
{
	return a[rx][ry]-a[rx][ly-1]-a[lx-1][ry]+a[lx-1][ly-1];
}

int solve(int lx, int rx, int ly, int ry)
{
	if(dp[lx][rx][ly][ry] != -1)
		return dp[lx][rx][ly][ry];
	int val = INF;
	for(int mx = lx; mx < rx; mx++)
		val = min(val, solve(lx, mx, ly, ry)+solve(mx+1, rx, ly, ry));
	for(int my = ly; my < ry; my++)
		val = min(val, solve(lx, rx, ly, my)+solve(lx, rx, my+1, ry));
	if(val == INF)
		return dp[lx][rx][ly][ry] = 0;
	else
		return dp[lx][rx][ly][ry] = C(lx, rx, ly, ry)+val;
}

signed main()
{
	fast();
	int n, m;
	cin >> n >> m;
	for(auto &i: dp)
		for(auto &j: i)
			for(auto &k: j)
				for(auto &l: k)
					l = -1;
	for(int i = 1; i <= n; i++)
	{
		for(int j = 1; j <= m; j++)
			cin >> a[i][j];
	}
	for(int i = 1; i <= n; i++)
	{
		for(int j = 1; j <= m; j++)
			a[i][j]+=a[i][j-1];
	}
	for(int i = 1; i <= n; i++)
	{
		for(int j = 1; j <= m; j++)
			a[i][j]+=a[i-1][j];
	}
	cout << solve(1, n, 1, m) << "\n";
	return 0;
}	

• Subtask 1: 100 / 100