Submission #1018048

#	Time	Username	Problem	Language	Result	Execution time	Memory
1018048		phong	Dango Maker (JOI18_dango_maker)	C++17	0 / 100	1 ms	4444 KiB

dango_maker

#include<bits/stdc++.h>

#define ll long long
#define int long long
const int nmax = 3000 + 5, N = 4e5;
const ll oo = 1e9;
const int lg = 18, M = 4e3;
const int base = 2e5, mod = 1e9 + 7;
#define pii pair<int, int>
#define fi first
#define se second
#define endl "\n"
#define debug(a, n) for(int i = 1; i <= n; ++i) cout << a[i] << ' ';cout << endl
using namespace std;
const double eps = 1e-9;

int n, m;
char a[nmax][nmax];
vector<pii> adj[nmax * 2];
int dp[nmax][nmax][3];
bool ok(int i, int j, int id){
    if(id == 1){
        return a[i][j - 1] == 'R' && a[i][j] == 'G' && a[i][j + 1] == 'W';
    }
    else{
        return a[i - 1][j] == 'R' && a[i][j] == 'G' && a[i + 1][j] == 'W';
    }
}
main(){
    cin >> n>> m;
    for(int i = 1; i <= n; ++i){
        for(int j = 1; j <= m; ++j){
            cin >> a[i][j];
            adj[i + j].push_back({i, j});
        }
    }
    for(int i = 1; i <= n; ++i){
        for(int j = 1; j <= m; ++j){
            dp[i][j][0] = max({dp[i - 1][j + 1][0], dp[i - 1][j + 1][1], dp[i - 1][j + 1][2]});
            dp[i][j][1] = max(dp[i - 1][j + 1][0], dp[i - 1][j + 1][2] + ok(i, j, 1));
            dp[i][j][2] = max(dp[i - 1][j + 1][0], dp[i - 1][j + 1][1] + ok(i, j, 2));

        }
    }
    int ans = 0;
    for(int i = 2; i <= n + m; ++i){
        int x = adj[i].back().fi;
        int y = adj[i].back().se;
        ans += max({dp[x][y][0], dp[x][y][1],dp[x][y][2]});
    }
    cout << ans;
}

Compilation message (stderr)

dango_maker.cpp:29:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   29 | main(){
      | ^~~~

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