Submission #780719

#	Time	Username	Problem	Language	Result	Execution time	Memory
780719		Trisanu_Das	Dango Maker (JOI18_dango_maker)	C++17	100 / 100	129 ms	15436 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 = 3000;
 
int N, M;
char A[MAXN+10][MAXN+10];
int dp[MAXN+10][3], ans;
 
int main()
{
    int i, j;
 
    scanf("%d%d", &N, &M);
    for(i=1; i<=N; i++) scanf("%s", A[i]+1);
 
    for(i=2; i<=N+M; i++)
    {
        int s=max(1, i-N), e=min(M, i-1);
        memset(dp, 0, sizeof(dp));
        for(j=s; j<=e; j++)
        {
            int x=j, y=i-j;
            dp[x][0]=max(dp[x-1][0], max(dp[x-1][1], dp[x-1][2]));
            if(A[y-1][x]=='R' && A[y][x]=='G' && A[y+1][x]=='W') dp[x][1]=max(dp[x-1][0], dp[x-1][1])+1;
            if(A[y][x-1]=='R' && A[y][x]=='G' && A[y][x+1]=='W') dp[x][2]=max(dp[x-1][0], dp[x-1][2])+1;
        }
        ans+=max(dp[e][0], max(dp[e][1], dp[e][2]));
    }
    printf("%d", ans);
}

Compilation message (stderr)

dango_maker.cpp: In function 'int main()':
dango_maker.cpp:18:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |     scanf("%d%d", &N, &M);
      |     ~~~~~^~~~~~~~~~~~~~~~
dango_maker.cpp:19:30: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |     for(i=1; i<=N; i++) scanf("%s", A[i]+1);
      |                         ~~~~~^~~~~~~~~~~~~~

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