Submission #769506

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
769506	2023-06-29 16:46:13	Ellinor	Tracks in the Snow (BOI13_tracks)	C++14	75.94 / 100	2092 ms	201524 KiB

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#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int i = (a); i < (b); i++)
typedef long long ll;
int H, W;
vector<string> grid;
vector<vector<ll>> visited; // bitset ?
priority_queue<vector<ll>> q;
void dfs(int hat, int wat, ll num)
{
    if (visited[hat][wat]>0) return;
    if (grid[hat][wat] == '.') return;
    visited[hat][wat] = num;
    char ch = grid[hat][wat];
    if (hat + 1 < H) {
        if (grid[hat + 1][wat] == ch) q.push({-num, hat + 1, wat});
        else q.push({-(num + 1), hat + 1, wat});
    }
    if (wat + 1 < W) {
        if (grid[hat][wat + 1] == ch) q.push({-num, hat, wat + 1});
        else q.push({-(num + 1), hat, wat + 1});
    }
    if (hat - 1 >= 0) {
        if (grid[hat - 1][wat] == ch) q.push({-num, hat - 1, wat});
 
 
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• Subtask 1: 30 / 30
• Subtask 2: 45.9375 / 70