Submission #590129

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
590129	2022-07-05 14:41:42	Minhho	Tracks in the Snow (BOI13_tracks)	C++17	19.79 / 100	748 ms	184400 KiB

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#define taskname "1"
#include <bits/stdc++.h>
#define iii tuple<int,int,int>
using namespace std;
const int dx[] = {1, 0, -1, 0}, dy[] = {0, 1, 0, -1}, maxn = 4010;
int a[maxn][maxn], d[maxn][maxn], w, h;
deque<iii> dq;
bool val(int i, int j) {return min(i, j) >= 1 && i <= w && j <= h && a[i][j] != -1;}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);
    //freopen("1.inp", "r", stdin);
    cin>>w>>h;
    char c;
    for (int i=1; i<=w; i++) for (int j=1; j<=h; j++) cin>>c, a[i][j] = c != '.' ? c : -1, d[i][j] = maxn * maxn;
    d[1][1] = 1;
    dq.emplace_back(1, 1, 1);
    while (!dq.empty())
    {
        auto [i, j, dij] = dq.front(); dq.pop_front();
        if (dij != d[i][j]) continue;
        for (int k=0; k<4; k++)
        {
            int ci = i + dx[k], cj = j + dy[k];
            if (val(ci, cj))
            {
 
 
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• Subtask 1: 6.666666666666667 / 30
• Subtask 2: 13.125 / 70