Submission #255628

#	Time	Username	Problem	Language	Result	Execution time	Memory
255628		tleontest1	Dango Maker (JOI18_dango_maker)	C++17	100 / 100	1507 ms	18272 KiB

dango_maker

#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target ("avx2")

#include <bits/stdc++.h>

using namespace std;

typedef long long lo;
typedef pair< lo,lo > PII;

#define fi first
#define se second
#define mp make_pair
#define endl "\n"
#define pb push_back
#define fio() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define FOR for(int i=1;i<=n;i++)
#define mid ((start+end)/2)
#define ort ((bas+son)/2)

const lo inf = 1000000000000000000;
const lo KOK = 100000;
const lo LOG = 30;
const lo li = 3005;
const lo mod = 1000000007;

int n,m,b[li],a[li],flag,t,vis[li][li],vis1[li][li],visit[li][li];
int ans;
char c[li][li];
string s;
vector<int> v;

int main(void){
	scanf("%d %d",&n,&m);
	FOR{
		for(int j=1;j<=m;j++){
			scanf(" %c",&c[i][j]);
		}
	}
	FOR{
		for(int j=1;j<=m;j++){
			if(c[i][j]!='G')continue;
			vector<PII> vec;
			vector<PII> dp;
			for(int k=0;k<j;k++){
				if(k+i>n)continue;
				if(c[i+k][j-k]=='G'){
					vec.pb({i+k,j-k});
				}
				else break;
			}
			for(int i=0;i<(int)vec.size()+10;i++)dp.pb({0,0});
			for(int i=(int)vec.size()-1;i>=0;i--){
				dp[i].fi=max(dp[i+1].fi,dp[i+2].se)+(c[vec[i].fi][vec[i].se-1]=='R' && c[vec[i].fi][vec[i].se+1]=='W'?1:0);
				dp[i].se=max(dp[i+1].se,dp[i+2].fi)+(c[vec[i].fi-1][vec[i].se]=='R' && c[vec[i].fi+1][vec[i].se]=='W'?1:0);
				c[vec[i].fi][vec[i].se]='.';
			}
			ans+=max(dp[0].fi,dp[0].se);
		}
	}
	printf("%d\n",ans);
	return 0;
}

Compilation message (stderr)

dango_maker.cpp: In function 'int main()':
dango_maker.cpp:36:7: 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:39:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf(" %c",&c[i][j]);
    ~~~~~^~~~~~~~~~~~~~~~

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