Submission #1255316

#	Time	Username	Problem	Language	Result	Execution time	Memory
1255316		Mer123haba456	Tracks in the Snow (BOI13_tracks)	C++20	82.50 / 100	2107 ms	269256 KiB

tracks

#include <bits/stdc++.h>
using namespace std;
#define fast_io ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define N lli(4005)
#define MOD lli(1e9 + 7)
#define heps(v) v.begin(), v.end()
typedef long long int lli;
typedef vector<lli> vlli;
typedef pair<lli, lli> plli;
typedef vector<plli> vplli;
typedef pair<lli, plli> pplli;
typedef vector<pplli> vpplli;

lli n,m,k,q,t;
vlli vect;

lli diz[N][N];

lli vis[4002][4002];

vplli yonler = {{0,1},{0,-1}, {1,0}, {-1,0}};

int main()
{
    fast_io
    cin >> n >> m;
    for(lli i = 1;i<=n;i++)
        for(lli j = 1;j<=m;j++){
            char c;
            cin >> c;
            if(c == 'F')
                diz[i][j] = 1;
            else if(c == 'R')
                diz[i][j] = 2;
        }
    priority_queue<pplli> Q;
    Q.push({-1, {1,1}});
    lli enb = 0;
    while(!(Q.empty())){
        pplli su = Q.top();
        Q.pop();
        if(vis[su.second.first][su.second.second])
            continue;
        vis[su.second.first][su.second.second] = 1;
        enb = max(enb, -su.first);
        for(plli yon : yonler){
            lli x = su.second.first + yon.first;
            lli y = su.second.second + yon.second;
            if(vis[x][y])
                continue;
            if(!diz[x][y])
                continue;
            if(diz[x][y] == diz[su.second.first][su.second.second])
                Q.push({su.first, {x,y}});
            else
                Q.push({su.first - 1, {x,y}});
        }
    }
    cout << enb << endl;
}

• Subtask 1: 30 / 30
• Subtask 2: 52.5 / 70