oj.uz

Submission #31346

# Submission time Handle Problem Language Result Execution time Memory
31346 2017-08-19T02:30:26 Z imaxblue Tracks in the Snow (BOI13_tracks) C++14
86.875 / 100
 2000 ms 51152 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define mp make_pair
#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<pii> 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().x; Y=q[t].front().y; q[t].pop();
            if (u[X][Y]) continue;
            u[X][Y]=1;
            //cout << X << ' ' << Y << ' ' << g[X][Y]<< endl;
            if (!(X+1>n || g[X+1][Y]=='.' || u[X+1][Y]))
            q[(g[X+1][Y]!=g[X][Y]) != t].push(mp(X+1, Y));
            if (!(X-1<1 || g[X-1][Y]=='.' || u[X-1][Y]))
            q[(g[X-1][Y]!=g[X][Y]) != t].push(mp(X-1, Y));
            if (!(Y+1>m || g[X][Y+1]=='.' || u[X][Y+1]))
            q[(g[X][Y+1]!=g[X][Y]) != t].push(mp(X, Y+1));
            if (!(Y-1<1 || g[X][Y-1]=='.' || u[X][Y-1]))
            q[(g[X][Y-1]!=g[X][Y]) != t].push(mp(X, Y-1));
        }
        t=!t;
    }
}
int main(){
    scanf("%i%i", &n, &m);
    fox1(l, n){
        fox1(l2, m){
            scanf(" %c", &g[l][l2]);
        }
    }
    bfs();
    cout << ans << endl;
    return 0;
}

Compilation message

tracks.cpp: In function 'int main()':
tracks.cpp:54:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i%i", &n, &m);
                          ^
tracks.cpp:57:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf(" %c", &g[l][l2]);
                                    ^

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 33480 KB Output is correct
2 Correct 0 ms 33348 KB Output is correct
3 Correct 0 ms 33348 KB Output is correct
4 Correct 29 ms 33612 KB Output is correct
5 Correct 3 ms 33348 KB Output is correct
6 Correct 0 ms 33348 KB Output is correct
7 Correct 0 ms 33348 KB Output is correct
8 Correct 0 ms 33348 KB Output is correct
9 Correct 0 ms 33348 KB Output is correct
10 Correct 6 ms 33348 KB Output is correct
11 Correct 9 ms 33480 KB Output is correct
12 Correct 16 ms 33480 KB Output is correct
13 Correct 6 ms 33348 KB Output is correct
14 Correct 6 ms 33348 KB Output is correct
15 Correct 29 ms 33348 KB Output is correct
16 Correct 33 ms 33480 KB Output is correct
17 Correct 33 ms 33348 KB Output is correct
18 Correct 26 ms 33612 KB Output is correct

Subtask #2
56.875 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 33348 KB Output is correct
2 Correct 169 ms 33348 KB Output is correct
3 Correct 1156 ms 33348 KB Output is correct
4 Correct 293 ms 33348 KB Output is correct
5 Correct 736 ms 33348 KB Output is correct
6 Execution timed out 2000 ms 51152 KB Execution timed out
7 Correct 6 ms 33348 KB Output is correct
8 Correct 6 ms 33348 KB Output is correct
9 Correct 6 ms 33348 KB Output is correct
10 Correct 0 ms 33348 KB Output is correct
11 Correct 3 ms 33348 KB Output is correct
12 Correct 3 ms 33348 KB Output is correct
13 Correct 153 ms 33348 KB Output is correct
14 Correct 76 ms 33348 KB Output is correct
15 Correct 79 ms 33348 KB Output is correct
16 Correct 56 ms 33348 KB Output is correct
17 Correct 386 ms 33348 KB Output is correct
18 Correct 283 ms 33348 KB Output is correct
19 Correct 269 ms 33348 KB Output is correct
20 Correct 229 ms 33348 KB Output is correct
21 Correct 623 ms 33348 KB Output is correct
22 Correct 599 ms 33348 KB Output is correct
23 Correct 686 ms 33480 KB Output is correct
24 Correct 613 ms 33348 KB Output is correct
25 Correct 1309 ms 33348 KB Output is correct
26 Correct 1693 ms 33480 KB Output is correct
27 Execution timed out 2000 ms 36684 KB Execution timed out
28 Execution timed out 2000 ms 51152 KB Execution timed out
29 Execution timed out 2000 ms 47368 KB Execution timed out
30 Execution timed out 2000 ms 47172 KB Execution timed out
31 Correct 1883 ms 34272 KB Output is correct
32 Execution timed out 2000 ms 35500 KB Execution timed out