oj.uz

Submission #31344

# Submission time Handle Problem Language Result Execution time Memory
31344 2017-08-19T02:15:59 Z imaxblue Tracks in the Snow (BOI13_tracks) C++14
84.6875 / 100
 2000 ms 63188 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];
queue<pii> q[2];
void bfs(){
    bool k;
    q[0].push(mp(1, 1));
    for (ans=0; !q[0].empty(); ans+=k){
        k=0;
        //cout << "*";
        while(!q[0].empty()){
            X=q[0].front().x; Y=q[0].front().y; q[0].pop();
            if (u[X][Y]) continue;
            u[X][Y]=1;
            k=1;
            if (!(X+1>n || g[X+1][Y]=='.' || u[X+1][Y]))
            q[g[X+1][Y]!=g[X][Y]].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]].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]].push(mp(X, Y+1));
            if (!(Y-1<0 || g[X][Y-1]=='.' || u[X][Y-1]))
            q[g[X][Y-1]!=g[X][Y]].push(mp(X, Y-1));
        }
        q[0]=q[1];
        while(!q[1].empty()) q[1].pop();
    }
}
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:55:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i%i", &n, &m);
                          ^
tracks.cpp:58:36: 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 33660 KB Output is correct
2 Correct 0 ms 33356 KB Output is correct
3 Correct 0 ms 33356 KB Output is correct
4 Correct 13 ms 33752 KB Output is correct
5 Correct 6 ms 33356 KB Output is correct
6 Correct 0 ms 33356 KB Output is correct
7 Correct 0 ms 33356 KB Output is correct
8 Correct 0 ms 33356 KB Output is correct
9 Correct 0 ms 33356 KB Output is correct
10 Correct 6 ms 33356 KB Output is correct
11 Correct 3 ms 33488 KB Output is correct
12 Correct 6 ms 33488 KB Output is correct
13 Correct 6 ms 33356 KB Output is correct
14 Correct 3 ms 33356 KB Output is correct
15 Correct 23 ms 33488 KB Output is correct
16 Correct 29 ms 33660 KB Output is correct
17 Correct 36 ms 33356 KB Output is correct
18 Correct 13 ms 33752 KB Output is correct

Subtask #2
54.6875 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 33488 KB Output is correct
2 Correct 149 ms 33488 KB Output is correct
3 Correct 1163 ms 33356 KB Output is correct
4 Correct 306 ms 33356 KB Output is correct
5 Correct 746 ms 33356 KB Output is correct
6 Execution timed out 2000 ms 63188 KB Execution timed out
7 Incorrect 13 ms 33356 KB Output isn't correct
8 Correct 6 ms 33488 KB Output is correct
9 Correct 3 ms 33488 KB Output is correct
10 Correct 3 ms 33356 KB Output is correct
11 Correct 13 ms 33488 KB Output is correct
12 Correct 3 ms 33356 KB Output is correct
13 Correct 139 ms 33488 KB Output is correct
14 Correct 69 ms 33356 KB Output is correct
15 Correct 89 ms 33356 KB Output is correct
16 Correct 69 ms 33488 KB Output is correct
17 Correct 403 ms 33488 KB Output is correct
18 Correct 416 ms 33356 KB Output is correct
19 Correct 276 ms 33356 KB Output is correct
20 Correct 243 ms 33356 KB Output is correct
21 Correct 736 ms 33356 KB Output is correct
22 Correct 733 ms 33356 KB Output is correct
23 Correct 783 ms 33488 KB Output is correct
24 Incorrect 599 ms 33356 KB Output isn't correct
25 Correct 1479 ms 33356 KB Output is correct
26 Incorrect 1723 ms 33488 KB Output isn't correct
27 Execution timed out 2000 ms 37056 KB Execution timed out
28 Execution timed out 2000 ms 63188 KB Execution timed out
29 Execution timed out 2000 ms 59736 KB Execution timed out
30 Correct 1979 ms 58820 KB Output is correct
31 Correct 1969 ms 35680 KB Output is correct
32 Correct 1936 ms 37528 KB Output is correct