oj.uz

Submission #148075

# Submission time Handle Problem Language Result Execution time Memory
148075 2019-08-31T13:40:25 Z WhipppedCream Popeala (CEOI16_popeala) C++17
100 / 100
 376 ms 16632 KB 
#include <bits/stdc++.h>
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
using namespace std;
#define X first
#define Y second
#define pb push_back
typedef pair<int, int> ii;
typedef long long ll;
 
const int maxt = 2e4+5;
const int maxn = 55;
 
ll pts[maxt];
 
char foo[maxn][maxt];
 
int n, t, s;
 
vector<int> lims[maxt];
ll mem[maxt];
ll dp[maxn][maxt];
 
void clear()
{
	for(int i = 0; i<= n; i++) mem[i] = 1e18+5;
}
int main()
{
	scanf("%d %d %d", &n, &t, &s);
	for(int i = 1; i<= t; i++)
	{
		scanf("%lld", &pts[i]);
		pts[i] += pts[i-1];
	}
	for(int i = 1; i<= n; i++)
	{
		scanf("%s", foo[i]+1);
	}
	for(int i = 1; i<= n; i++)
	{
		int last = 0;
		for(int j = 1; j<= t; j++)
		{
			if(foo[i][j] == '1')
			{
				lims[j].pb(last);
			}
			else
			{
				lims[j].pb(j);
				last = j; 
			}
		}
	}
	for(int i = 1; i<= t; i++)
	{
		lims[i].pb(i);
		sort(lims[i].begin(), lims[i].end());
	}
	for(int i = 0; i<= s; i++)
	{
		for(int j = 0; j<= t; j++)
		{
			dp[i][j] = 1e18;
		}
	}
	dp[0][0] = 0;
	for(int i = 1; i<= s; i++)
	{
		clear();
		for(int j = 1; j<= t; j++)
		{
			// printf("computing %d\n", j);
			for(int k = 0; k<= n; k++)
			{
				for(int run = j>1?lims[j-1][k]:0; run< lims[j][k]; run++)
				{
					mem[k] = min(mem[k], dp[i-1][run]-pts[run]*k);
					// if(k == 0) printf("cand2 %d-%d\n", dp[i-1][run], pts[run]*k);
				}
				// printf("[%d..%d), %d\n", j>1?lims[j-1][k]:0, lims[j][k], mem[k]);
				if(lims[j][k]> 0) dp[i][j] = min(dp[i][j], mem[k]+k*pts[j]);
				// printf("cand %d\n", mem[k]+k*pts[j]);
			}
			// printf("dp[%d][%d] = %d\n", i, j, dp[i][j]);
		}
		printf("%lld\n", dp[i][t]);
	}
}

Compilation message

popeala.cpp: In function 'int main()':
popeala.cpp:30:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d %d", &n, &t, &s);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
popeala.cpp:33:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld", &pts[i]);
   ~~~~~^~~~~~~~~~~~~~~~~
popeala.cpp:38:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s", foo[i]+1);
   ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 888 KB Output is correct
2 Correct 3 ms 1016 KB Output is correct

Subtask #2
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 1660 KB Output is correct
2 Correct 12 ms 1656 KB Output is correct
3 Correct 13 ms 1656 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 2988 KB Output is correct
2 Correct 70 ms 3656 KB Output is correct
3 Correct 79 ms 4344 KB Output is correct

Subtask #4
74.0 / 74.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 888 KB Output is correct
2 Correct 3 ms 1016 KB Output is correct
3 Correct 13 ms 1660 KB Output is correct
4 Correct 12 ms 1656 KB Output is correct
5 Correct 13 ms 1656 KB Output is correct
6 Correct 51 ms 2988 KB Output is correct
7 Correct 70 ms 3656 KB Output is correct
8 Correct 79 ms 4344 KB Output is correct
9 Correct 106 ms 6352 KB Output is correct
10 Correct 169 ms 7928 KB Output is correct
11 Correct 288 ms 16376 KB Output is correct
12 Correct 305 ms 16520 KB Output is correct
13 Correct 369 ms 16632 KB Output is correct
14 Correct 376 ms 16632 KB Output is correct
15 Correct 368 ms 16508 KB Output is correct