Submission #581666

#	Time	Username	Problem	Language	Result	Execution time	Memory
581666		chirathnirodha	Kamenčići (COCI21_kamencici)	C++17	0 / 70	128 ms	335816 KiB

Main

//Coded by Chirath Nirodha
#include<bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//using namespace __gnu_pbds;
using namespace std;
#define F first
#define S second
#define PB push_back
#define MP make_pair
#define P push
#define I insert
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
//typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> indexed_set;
const ll mod=1e9+7;
inline void io(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
}
int n,k;
string s;
ll dp[350][350][350];
ll rec(int a,int b,int c){
	if(dp[a][b][c]!=-1)return dp[a][b][c];
	if(c==0){dp[a][b][c]=0;return dp[a][b][c];}
	if(a==b){
		if(s[a]=='C' && c==1)dp[a][b][c]=1;
		else dp[a][b][c]=INT32_MAX;
		return dp[a][b][c];
	}
	if(b-a==1){
		if(s[a]=='C' && s[b]=='C' && c==1)dp[a][b][c]=1;
		else dp[a][b][c]=INT32_MAX;
		return dp[a][b][c];
	}
	ll tem;
	dp[a][b][c]=INT32_MIN;
	if(s[a]=='C')tem=min(rec(a+1,b-1,c-1),rec(a+2,b,c-1));
	else tem=min(rec(a+1,b-1,c),rec(a+2,b,c));
	dp[a][b][c]=max(dp[a][b][c],tem+1-rec(a+1,b,c));

	if(s[b]=='C')tem=min(rec(a+1,b-1,c-1),rec(a,b-2,c-1));
	else tem=min(rec(a+1,b-1,c),rec(a,b-2,c));
	dp[a][b][c]=max(dp[a][b][c],tem+1-rec(a,b-1,c));
	return dp[a][b][c];
}
void solve(){
    io();
	cin>>n>>k;
	cin>>s;
	memset(dp,-1,sizeof(dp));
	if(rec(0,n-1,k)>0)cout<<"DA"<<endl;
	else cout<<"NE"<<endl;
}
int main(){
    io();
	solve();
	//int t;cin>>t;for(int i=0;i<t;i++)solve();
    return 0;
}

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