oj.uz

Submission #31348

# Submission time Handle Problem Language Result Execution time Memory
31348 2017-08-19T02:40:31 Z imaxblue Tracks in the Snow (BOI13_tracks) C++14
100 / 100
 1816 ms 42212 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define mp(x, y) (x << 13)+y
#define pb push_back
#define x first
#define y second
#define pii pair<int, int>
#define p3i pair<pii, int>
#define pll pair<ll, ll>
#define p3l pair<pll, ll>
#define lseg L, (L+R)/2, N*2+1
#define rseg (L+R)/2+1, R, N*2+2
#define ub upper_bound
#define lb lower_bound
#define pq priority_queue
#define MN 1000000007
#define fox(k, x) for (int k=0; k<x; ++k)
#define fox1(k, x) for (int k=1; k<=x; ++k)
#define foxr(k, x) for (int k=x-1; k>=0; --k)
#define fox1r(k, x) for (int k=x; k>0; --k)
#define ms multiset
#define flood(x) memset(x, 0x3f3f3f3f, sizeof x)
#define drain(x) memset(x, 0, sizeof x)

int n, m, X, Y, ans;
char g[4005][4005];
bool u[4005][4005], t;
queue<int> q[2];
void bfs(){
    //cout << "*";
    q[0].push(mp(1, 1));
    for (ans=0; !q[t].empty(); ans++){
        //cout << "*";
        while(!q[t].empty()){
            //cout << "*";
            X=q[t].front() >> 13; Y=q[t].front() &(8191); q[t].pop();
            if (u[X][Y]) continue;
            u[X][Y]=1;
            //cout << X << ' ' << Y << ' ' << g[X][Y]<< endl;
            if (!(X+1>n || u[X+1][Y]))
            q[(g[X+1][Y]!=g[X][Y]) != t].push(mp(X+1, Y));
            if (!(X-1<1 || u[X-1][Y]))
            q[(g[X-1][Y]!=g[X][Y]) != t].push(mp(X-1, Y));
            if (!(Y+1>m || u[X][Y+1]))
            q[(g[X][Y+1]!=g[X][Y]) != t].push(mp(X, Y+1));
            if (!(Y-1<1 || u[X][Y-1]))
            q[(g[X][Y-1]!=g[X][Y]) != t].push(mp(X, Y-1));
        }
        t=!t;
    }
}
char ch;
int main(){
    scanf("%i%i", &n, &m);
    fox1(l, n){
        ch=getchar();
        fox1(l2, m){
            g[l][l2]=getchar();
            //scanf(" %c", &g[l][l2]);
            u[l][l2]=(g[l][l2]=='.');
        }
    }
    bfs();
    printf("%i", ans);
    return 0;
}

Compilation message

tracks.cpp: In function 'void bfs()':
tracks.cpp:42:51: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
             q[(g[X+1][Y]!=g[X][Y]) != t].push(mp(X+1, Y));
                                                   ^
tracks.cpp:4:19: note: in definition of macro 'mp'
 #define mp(x, y) (x << 13)+y
                   ^
tracks.cpp:44:51: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
             q[(g[X-1][Y]!=g[X][Y]) != t].push(mp(X-1, Y));
                                                   ^
tracks.cpp:4:19: note: in definition of macro 'mp'
 #define mp(x, y) (x << 13)+y
                   ^
tracks.cpp: In function 'int main()':
tracks.cpp:55:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i%i", &n, &m);
                          ^

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 33484 KB Output is correct
2 Correct 0 ms 33352 KB Output is correct
3 Correct 0 ms 33352 KB Output is correct
4 Correct 6 ms 33484 KB Output is correct
5 Correct 0 ms 33352 KB Output is correct
6 Correct 0 ms 33352 KB Output is correct
7 Correct 0 ms 33352 KB Output is correct
8 Correct 0 ms 33352 KB Output is correct
9 Correct 0 ms 33352 KB Output is correct
10 Correct 3 ms 33352 KB Output is correct
11 Correct 3 ms 33352 KB Output is correct
12 Correct 6 ms 33352 KB Output is correct
13 Correct 3 ms 33352 KB Output is correct
14 Correct 0 ms 33352 KB Output is correct
15 Correct 13 ms 33352 KB Output is correct
16 Correct 23 ms 33484 KB Output is correct
17 Correct 3 ms 33352 KB Output is correct
18 Correct 9 ms 33484 KB Output is correct

Subtask #2
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 33352 KB Output is correct
2 Correct 53 ms 33352 KB Output is correct
3 Correct 306 ms 33352 KB Output is correct
4 Correct 96 ms 33352 KB Output is correct
5 Correct 173 ms 33352 KB Output is correct
6 Correct 1573 ms 42212 KB Output is correct
7 Correct 3 ms 33352 KB Output is correct
8 Correct 3 ms 33352 KB Output is correct
9 Correct 0 ms 33352 KB Output is correct
10 Correct 0 ms 33352 KB Output is correct
11 Correct 0 ms 33352 KB Output is correct
12 Correct 0 ms 33352 KB Output is correct
13 Correct 53 ms 33352 KB Output is correct
14 Correct 26 ms 33352 KB Output is correct
15 Correct 29 ms 33352 KB Output is correct
16 Correct 29 ms 33352 KB Output is correct
17 Correct 149 ms 33352 KB Output is correct
18 Correct 93 ms 33352 KB Output is correct
19 Correct 76 ms 33352 KB Output is correct
20 Correct 73 ms 33352 KB Output is correct
21 Correct 159 ms 33352 KB Output is correct
22 Correct 186 ms 33352 KB Output is correct
23 Correct 319 ms 33352 KB Output is correct
24 Correct 163 ms 33352 KB Output is correct
25 Correct 486 ms 33352 KB Output is correct
26 Correct 1669 ms 33352 KB Output is correct
27 Correct 1816 ms 35092 KB Output is correct
28 Correct 1776 ms 42212 KB Output is correct
29 Correct 1779 ms 40404 KB Output is correct
30 Correct 1446 ms 40232 KB Output is correct
31 Correct 1219 ms 33748 KB Output is correct
32 Correct 1493 ms 34404 KB Output is correct