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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#278530#7880. Streak ManipulationjchhhWA 5ms19312kbC++141.4kb2023-12-07 16:59:242023-12-07 16:59:24

Judging History

你现在查看的是最新测评结果

  • [2023-12-07 16:59:24]
  • 评测
  • 测评结果:WA
  • 用时:5ms
  • 内存:19312kb
  • [2023-12-07 16:59:24]
  • 提交

answer

#include<bits/stdc++.h>

#define int long long
using namespace std;
typedef pair<int,int> PII;
const int N = 200010;
char a[N];
int s[N];
int n,m,k;

bool check(int x)
{
    int ans = 1e9;
    int f[N][5][2];
    memset(f,0x3f,sizeof f);
    f[0][0][0] = 0;
    f[0][0][1] = 0;
    for(int i = 1;i <= n;i++)
    {
        if(a[i] == '0') 
        {
            f[i][0][0] = 0;
            f[i][0][1] = 1;
        }
        else f[i][0][1] = 0;
        for(int j = 1;j <= k;j++)
        {
            f[i][j][0] = min(f[i - 1][j][0],f[i - 1][j][1]);
            if(i >= x && a[i - x] == '0') f[i][j][1] = f[i - x][j - 1][0] + s[i] - s[i - x];
            if(j == k) ans = min({ans,f[i][k][0],f[i][k][1]});
        }
    }
    return ans <= m;
}

void solve()
{
    
    cin >> n >> m >> k;
    cin >> a + 1;
    a[0] = '0';
    for(int i = 1;i <= n;i++) 
    {
        s[i] = s[i - 1];
        if(a[i] == '0') s[i]++;
    }
    
   
    
    int l = 0, r = n;
    while(l < r)
    {
        int mid = l + r + 1 >> 1;
        if(check(mid)) l = mid;
        else r = mid - 1;
    }
    if(l == 0) l--;
    cout << l << endl;
    
    
}



signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    
    int T = 1;
    //cin >> T;

    while(T--)
    {
        solve();
    }
    return 0;
}

詳細信息

Test #1:

score: 100
Accepted
time: 4ms
memory: 19188kb

input:

8 3 2
10110110

output:

3

result:

ok 1 number(s): "3"

Test #2:

score: 0
Accepted
time: 3ms
memory: 19240kb

input:

12 3 3
100100010011

output:

2

result:

ok 1 number(s): "2"

Test #3:

score: 0
Accepted
time: 3ms
memory: 19312kb

input:

4 4 4
0000

output:

-1

result:

ok 1 number(s): "-1"

Test #4:

score: -100
Wrong Answer
time: 5ms
memory: 19248kb

input:

1000 200 5
0001001000101001110010011001101010110101101100010100111110111111010010001100100111100101011100011101011001110010111100100100011001010011000100011111010110100001101110101001110000001000111010000111110100111101100110011010011111000111101001010011000111010111010100101111100000100001011001010...

output:

-1

result:

wrong answer 1st numbers differ - expected: '99', found: '-1'