Submission #123046

#	Time	Username	Problem	Language	Result	Execution time	Memory
123046		arnold518	Dango Maker (JOI18_dango_maker)	C++14	33 / 100	2059 ms	94392 KiB

dango_maker

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 10;
const int MAXVAL = 6e4;

int N, M;
char A[MAXN+10][MAXN+10];

int pow3[MAXN+10], dp[MAXN+10][MAXN+10][MAXVAL+10];

int solve(int y, int x, int mask)
{
    if(y==N) return 0;

    int &ret=dp[y][x][mask];
    if(ret!=-1) return ret;
    ret=0;

    if(x+1==M) ret=max(ret, solve(y+1, 0, mask/3+pow3[M-1]*(max(mask%3-1, 0))));
    else ret=max(ret, solve(y, x+1, mask/3+pow3[M-1]*(max(mask%3-1, 0))));

    if(A[y][x]=='R')
    {
        if(y+2<N && A[y][x]=='R' && A[y+1][x]=='G' && A[y+2][x]=='W' && mask%3==0)
        {
            if(x+1==M) ret=max(ret, solve(y+1, 0, mask/3+pow3[M-1]*2)+1);
            else ret=max(ret, solve(y, x+1, mask/3+pow3[M-1]*2)+1);
        }
        if(x+2<M && A[y][x]=='R' && A[y][x+1]=='G' && A[y][x+2]=='W' && mask%27==0)
        {
            if(x+3==M) ret=max(ret, solve(y+1, 0, mask/27)+1);
            else ret=max(ret, solve(y, x+3, mask/27)+1);
        }
    }
    return ret;
}

int main()
{
    int i, j;

    scanf("%d%d", &N, &M);
    for(i=0; i<N; i++) scanf("%s", A[i]);

    pow3[0]=1;
    for(i=1; i<=MAXN; i++) pow3[i]=pow3[i-1]*3;
    memset(dp, -1, sizeof(dp));

    printf("%d", solve(0, 0, 0));
}

Compilation message (stderr)

dango_maker.cpp: In function 'int main()':
dango_maker.cpp:45:12: warning: unused variable 'j' [-Wunused-variable]
     int i, j;
            ^
dango_maker.cpp:47:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &N, &M);
     ~~~~~^~~~~~~~~~~~~~~~
dango_maker.cpp:48:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(i=0; i<N; i++) scanf("%s", A[i]);
                        ~~~~~^~~~~~~~~~~~

• Subtask 1: 13 / 13
• Subtask 2: 20 / 20
• Subtask 3: 0 / 67