Submission #938137

#	Time	Username	Problem	Language	Result	Execution time	Memory
938137		Ice_man	Chorus (JOI23_chorus)	C++14	0 / 100	0 ms	344 KiB

chorus

#include <iostream>
#include <chrono>

#define maxn 2005
#define maxlog 20
#define INF 1000000010
#define LINF 1000000000000000005
#define endl '\n'
#define pb(x) push_back(x)
#define X first
#define Y second
#define control cout<<"passed"<<endl;

#pragma GCC optimize("O3" , "Ofast" , "unroll-loops" , "fast-math")
#pragma GCC target("avx2")

using namespace std;

std::chrono::high_resolution_clock::time_point startT, currT;
constexpr double TIME_MULT = 1;

double timePassed()
{
    using namespace std::chrono;
    currT = high_resolution_clock::now();
    double time = duration_cast<duration<double>>(currT - startT).count();
    return time * TIME_MULT;
}


int n , k;
string s;

void read()
{
    cin >> n >> k;
    cin >> s;
}

int dp[maxn][maxn] , a[maxn];
int bra , brb;

int calc(int y , int x)
{
    int ret = 0;

    for(int i = y + 1; i <= x; i++)
        if(a[i] >= y)
            ret += a[i] - y;

    return ret;
}


void calc_dp()
{
    bra = 0;
    brb = 0;

    for(char c : s)
        if(c == 'A')
            a[++bra] = brb;
        else
            brb++;

    for(int i = 0; i <= 2 * n; i++)
        for(int j = 0; j <= k; j++)
            dp[i][j] = INF;

    dp[0][0] = 0;

    for(int i = 1; i <= k; i++)
        for(int j = 1; j <= n; j++)
            for(int k = 0; k < j; k++)
                dp[i][j] = min(dp[i][j] , dp[i - 1][k] + calc(k , j));

    cout << dp[k][n] << endl;
}




int main()
{

    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    startT = std::chrono::high_resolution_clock::now();

    read();
    calc_dp();


    return 0;
}

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