Submission #901562

#	Time	Username	Problem	Language	Result	Execution time	Memory
901562		Tuanlinh123	Chorus (JOI23_chorus)	C++17	16 / 100	7092 ms	4700 KiB

chorus

#include<bits/stdc++.h>
#define ll long long
#define pll pair<ll, ll>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define ld long double
using namespace std;

const ll inf=2e9, maxn=1e3;
ll n, k, a[maxn], dp[maxn][maxn];

ll cost(ll j, ll i)
{
    ll ans=0;
    for (ll k=j+1; k<=i; k++)
        if (a[k]>=j)
            ans+=a[k]-j;
    return ans;
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    cin >> n >> k;
    string s; cin >> s;
    ll x=0, y=0, crr=1;
    for (ll i=0; i<n*2; i++)
    {
        if (s[i]=='A')
            x++, a[x]=y;
        else y++;
    }
    for (ll i=0; i<=k; i++)
        for (ll j=0; j<=n; j++)
            dp[i][j]=inf*inf;
    dp[0][0]=0;
    for (ll i=1; i<=k; i++)
        for (ll j=1; j<=n; j++)
            for (ll z=0; z<j; z++)
                dp[i][j]=min(dp[i][j], dp[i-1][z]+cost(z, j));
    cout << dp[k][n];
}

Compilation message (stderr)

chorus.cpp: In function 'int main()':
chorus.cpp:29:18: warning: unused variable 'crr' [-Wunused-variable]
   29 |     ll x=0, y=0, crr=1;
      |                  ^~~

• Subtask 1: 16 / 16
• Subtask 2: 0 / 24
• Subtask 3: 0 / 21
• Subtask 4: 0 / 26
• Subtask 5: 0 / 13