Submission #1204142

#	Time	Username	Problem	Language	Result	Execution time	Memory
1204142		cbnhtmanh	Kamenčići (COCI21_kamencici)	C++20	0 / 70	0 ms	320 KiB

Main

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*/

#include <bits/stdc++.h>
#define fi(i, a, b) for( int i = a; i <= b; i++ )
#define fid(i, a, b) for( int i = a; i >= b; i-- )
#define getbit(x, i) ((x>>i)&1)
#define ll long long
#define pb push_back
#define pii pair<int,int>
#define pli pair<ll,int>
#define pll pair<ll,ll>
#define st first
#define nd second
#define mp make_pair
#define HTManh ""
#define maxn 100009
#define endl '\n'
using namespace std;

int test;
int n, k;
string s;

pii dp[359][359];
bool kq[359][359];
bool xd[359][359];

bool calc(int len, int d)
{
    int c = d+len-1;
    if (xd[d][c]) return kq[d][c];
    xd[d][c] = 1;
    if ((n-len)%2 == 0)
    {
        if (dp[d][c].nd == 0)
        {
            cout << d << " " << c << " " << 0 << endl;
            return 0;
        }
        dp[d][c-1] = min(dp[d][c-1], {dp[d][c].st-(s[c]=='C'), dp[d][c].nd});
        dp[d+1][c] = min(dp[d+1][c], {dp[d][c].st-(s[d]=='C'), dp[d][c].nd});
    }
    else
    {
        if (dp[d][c].st == 0)
        {
            cout << d << " " << c << " " << 1 << endl;
            return 1;
        }
        dp[d][c-1] = min(dp[d][c-1], {dp[d][c].st, dp[d][c].nd-(s[c]=='C')});
        dp[d+1][c] = min(dp[d+1][c], {dp[d][c].st, dp[d][c].nd-(s[d]=='C')});
    }
    bool kq1 = calc(len-1,d), kq2 = calc(len-1,d+1);
    bool res = 0;
    if ((n-len)%2==0)
    {
        if (kq1 == kq2 && kq2 == 1) res = 1;
        else res = 0;
    }
    else
    {
        if (kq1 == kq2 && kq2 == 0) res = 0;
        else res = 1;
    }
    //cout << d << " " << c << " " << res << endl;
    return res;
}

int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(NULL); cout.tie(NULL);
	if (fopen(HTManh".inp", "r"))
    {
        freopen(HTManh".inp", "r", stdin);
        freopen(HTManh".out", "w", stdout);
    }

    cin >> n >> k >> s;
    s = ' ' + s;

    fi(i,1,n) fi(j,1,n) dp[i][j] = {1e9, 1e9};
    dp[1][n] = {k, k};
    cout << (calc(n,1) ? "NE" : "DA");
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:98:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   98 |         freopen(HTManh".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:99:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   99 |         freopen(HTManh".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 40