Submission #874563

#	Time	Username	Problem	Language	Result	Execution time	Memory
874563		ngjabach	Kamenčići (COCI21_kamencici)	C++14	70 / 70	37 ms	171132 KiB

Main

#include <cstdio>


using namespace std;

const int MAXN = 352;

int n,k;
char str[MAXN];
int prefix[MAXN];
int dp[MAXN][MAXN][MAXN];

int can_win(int l, int r, int uk){
    int& res = dp[l][r][uk];
    if(res == -1){
        int total_red = prefix[n-1];
        int red_left = prefix[r];
        if(l) red_left -= prefix[l-1];
        int other_red = total_red - red_left - uk;
        if(uk>=k){
            res = 0;
        }else if(other_red>=k){
            res = 1;
        }else{
            if(!can_win(l+1, r, other_red) || !can_win(l, r-1, other_red)){
                res = 1;
            }else{
                res = 0;
            }
        }
    }
    return res;
}

int main(){
    for(int i=0;i<MAXN;i++) for(int j=0;j<MAXN;j++) for(int k=0;k<MAXN;k++)
        dp[i][j][k] = -1;
    scanf("%d%d", &n, &k);
    scanf("%s", str);
    prefix[0] = (str[0] == 'C');
    for(int i=1;i<n;i++) prefix[i] = prefix[i-1] + (str[i] == 'C');

    if(can_win(0, n-1, 0)){
        puts("DA");
    }else{
        puts("NE");
    }
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:38:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |     scanf("%d%d", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:39:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |     scanf("%s", str);
      |     ~~~~~^~~~~~~~~~~

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