oj.uz

Submission #363543

# Submission time Handle Problem Language Result Execution time Memory
363543 2021-02-06T14:02:11 Z arnold518 Nafta (COI15_nafta) C++14
34 / 100
 1000 ms 28816 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 2000;

const int dy[] = {-1, 1, 0, 0};
const int dx[] = {0, 0, -1, 1};

int N, M;
char S[MAXN+10][MAXN+10];

struct Data
{
	int l, r, v;
};
vector<Data> V;
vector<pii> V2[MAXN+10];

int dp[MAXN+10][MAXN+10];

int main()
{
	scanf("%d%d", &N, &M);
	for(int i=1; i<=N; i++) scanf("%s", S[i]+1);

	for(int i=1; i<=N; i++)
	{
		for(int j=1; j<=M; j++)
		{
			if(S[i][j]=='.') continue;

			int sum=0, l=j, r=j;
			queue<pii> Q;
			Q.push({i, j});
			sum+=S[i][j]-'0';
			S[i][j]='.';

			while(!Q.empty())
			{
				pii now=Q.front(); Q.pop();
				for(int i=0; i<4; i++)
				{
					int ny=now.first+dy[i], nx=now.second+dx[i];
					if(!(1<=ny && ny<=N && 1<=nx && nx<=M)) continue;
					if(S[ny][nx]=='.') continue;
					Q.push({ny, nx});
					l=min(l, nx);
					r=max(r, nx);
					sum+=S[ny][nx]-'0';
					S[ny][nx]='.';
				}
			}
			V.push_back({l, r, sum});
			V2[l].push_back({r, sum});
		}
	}

	for(int i=1; i<=M; i++)
	{
		V2[i].push_back({M+1, 0});
		sort(V2[i].begin(), V2[i].end());
		for(int j=V2[i].size()-2; j>=0; j--)
		{
			V2[i][j].second+=V2[i][j+1].second;
		}
	}

	for(int i=1; i<=M; i++)
	{
		int val=0;
		for(int j=i-1; j>=0; j--)
		{
			val+=lower_bound(V2[j+1].begin(), V2[j+1].end(), pii(i, 0))->second;
			for(int k=1; k<=M; k++)
			{
				dp[i][k]=max(dp[i][k], dp[j][k-1]+val);
			}
		}
	}

	for(int i=1; i<=M; i++)
	{
		int ans=0;
		for(int j=1; j<=M; j++)
		{
			ans=max(ans, dp[j][i]);
		}
		printf("%d\n", ans);
	}
}

Compilation message

nafta.cpp: In function 'int main()':
nafta.cpp:27:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   27 |  scanf("%d%d", &N, &M);
      |  ~~~~~^~~~~~~~~~~~~~~~
nafta.cpp:28:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   28 |  for(int i=1; i<=N; i++) scanf("%s", S[i]+1);
      |                          ~~~~~^~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 876 KB Output is correct
2 Correct 1 ms 748 KB Output is correct
3 Correct 1 ms 748 KB Output is correct
4 Correct 1 ms 768 KB Output is correct
5 Correct 1 ms 748 KB Output is correct
6 Correct 1 ms 748 KB Output is correct

Subtask #2
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 876 KB Output is correct
2 Correct 1 ms 748 KB Output is correct
3 Correct 1 ms 748 KB Output is correct
4 Correct 1 ms 768 KB Output is correct
5 Correct 1 ms 748 KB Output is correct
6 Correct 1 ms 748 KB Output is correct
7 Correct 21 ms 2924 KB Output is correct
8 Correct 21 ms 2796 KB Output is correct
9 Correct 23 ms 2688 KB Output is correct
10 Correct 21 ms 2796 KB Output is correct
11 Correct 20 ms 2668 KB Output is correct
12 Correct 19 ms 2668 KB Output is correct

Subtask #3
0 / 66.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 876 KB Output is correct
2 Correct 1 ms 748 KB Output is correct
3 Correct 1 ms 748 KB Output is correct
4 Correct 1 ms 768 KB Output is correct
5 Correct 1 ms 748 KB Output is correct
6 Correct 1 ms 748 KB Output is correct
7 Correct 21 ms 2924 KB Output is correct
8 Correct 21 ms 2796 KB Output is correct
9 Correct 23 ms 2688 KB Output is correct
10 Correct 21 ms 2796 KB Output is correct
11 Correct 20 ms 2668 KB Output is correct
12 Correct 19 ms 2668 KB Output is correct
13 Execution timed out 1085 ms 28816 KB Time limit exceeded
14 Halted 0 ms 0 KB -