Submission #824020

#	Time	Username	Problem	Language	Result	Execution time	Memory
824020		AmirElarbi	Dango Maker (JOI18_dango_maker)	C++14	13 / 100	1 ms	340 KiB

dango_maker

#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#define INF 1e9
#define ve vector
#define vi ve<int>
#define ii pair<int,int>
#define vii ve<ii>
#define pb push_back
#define fi first
#define se second
#define ll long long
using namespace __gnu_pbds;
using namespace std;
const int nax = 3e3+5;
const int kax = 25+5;
const int MOD = 1e9+7;
template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
map<char,int> mp;
char grid[nax][nax];
int inv[3] = {'R', 'G', 'W'};
int n,m, ans[nax][nax][2];
queue<pair<ii,int>> res[4];
bool check(int x, int y, bool type){
    for (int i = 0; i < 3; ++i)
    {
        if(x >= n || y >= m || x < 0 || y < 0) return false;
        if(grid[x][y] != inv[i]) return false;
        x += !type, y += type;
    }
    return true;
}
int main() {
    ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    mp['R'] = 0, mp['G'] = 1, mp['W'] = 2;
    cin >> n >> m;
    for (int i = 0; i < n; ++i)
    {
        for (int j = 0; j < m; ++j)
        {
            cin >> grid[i][j];
        }
    }
    for (int i = 0; i < n; ++i)
    {
        for (int j = 0; j < m; ++j)
        {
            if(grid[i][j] == 'R'){
                if(check(i,j,1)){
                    int cnt = 0;
                    for (int k = 0;k < 3; ++k)
                    {
                        if(check(i-k,j+k,0)) cnt++;
                    }
                    res[cnt].push({{i,j},1});
                    ans[i][j][1] = cnt;
                }
                if(check(i,j,0)){
                    int cnt = 0;
                    for (int k = 0;k < 3; ++k)
                    {
                        if(check(i+k,j-k,1)) cnt++;
                    }
                    res[cnt].push({{i,j},0});
                    ans[i][j][0] = cnt;
                }
            }
        }
    }
    for (int cnt = 3; cnt > 0; --cnt)
    {
        while(!res[cnt].empty()){
            pair<ii,int> st = res[cnt].front();
            int i = st.fi.fi, j = st.fi.se;
            res[cnt].pop();
            if(ans[i][j][st.se] != cnt){
                res[ans[i][j][st.se]].push({st});
                continue;
            }
            for (int k = 0;k < 3; ++k)
            {
                if(st.se && check(i-k,j+k,0)) ans[i-k][j+k][0]--;
                if(!st.se && check(i+k,j-k,1)) ans[i+k][j-k][1]--;
            }
        }
    }
    cout << res[0].size() << endl;
}

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