Submission #955449

#	Time	Username	Problem	Language	Result	Execution time	Memory
955449		hariaakas646	007 (CEOI14_007)	C++14	0 / 100	176 ms	22976 KiB

007

#include <bits/stdc++.h>

using namespace std;

#define scd(t) scanf("%d", &t)
#define sclld(t) scanf("%lld", &t)
#define forr(i, j, k) for (int i = j; i < k; i++)
#define frange(i, j) forr(i, 0, j)
#define all(cont) cont.begin(), cont.end()
#define mp make_pair
#define pb push_back
#define f first
#define s second
typedef long long int lli;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<bool> vb;
typedef vector<lli> vll;
typedef vector<string> vs;
typedef vector<pii> vii;
typedef vector<vi> vvi;
typedef map<int, int> mpii;
typedef set<int> seti;
typedef multiset<int> mseti;
typedef long double ld;


void usaco()
{
    freopen("/media/hariaakash646/785EF1075EF0BF46/CompetitiveProgramming/input.in", "r", stdin);
//    freopen("problem.out", "w", stdout);
}

int n, m;
vvi graph;

vi bfs(int x) {
    vi dist(n+1, 1e9);
    vb vis(n+1);
    queue<pii> q;
    q.push(mp(x, 0));
    while(q.size()) {
        auto p = q.front();
        q.pop();
        if(vis[p.f]) continue;
        // printf("%d\n", p.f);
        vis[p.f] = true;
        dist[p.f] = p.s;
        for(auto e : graph[p.f]) {
            // printf("%d ", e);
            q.push(mp(e, p.s+1));
        }
    }
    return dist;
}

int main() {
    // usaco();
    scd(n); scd(m);
    int s1, s2, a, b;
    scd(s1);
    scd(s2);
    scd(a);
    scd(b);
    graph = vvi(n+1);

    frange(i, m) {
        int a, b;
        scd(a);
        scd(b);
        graph[a].pb(b);
        graph[b].pb(a);
    }

    vi dist1 = bfs(s1);
    vi dist2 = bfs(s2);
    // printf("%d %d %d %d\n", dist1[a], dist1[b], dist2[a], dist2[b]);

    if(dist1[a] > dist2[a] || dist1[b] > dist2[b]) printf("-1");
    else {
        // if(dist2[a] == dist2[b] && dist1[a] == dist1[b]) dist1[a]++;
        printf("%d", min(dist2[a]-dist1[a], dist2[b]-dist1[b]));
    }

}

Compilation message (stderr)

007.cpp: In function 'void usaco()':
007.cpp:30:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     freopen("/media/hariaakash646/785EF1075EF0BF46/CompetitiveProgramming/input.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
007.cpp: In function 'int main()':
007.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
007.cpp:59:5: note: in expansion of macro 'scd'
   59 |     scd(n); scd(m);
      |     ^~~
007.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
007.cpp:59:13: note: in expansion of macro 'scd'
   59 |     scd(n); scd(m);
      |             ^~~
007.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
007.cpp:61:5: note: in expansion of macro 'scd'
   61 |     scd(s1);
      |     ^~~
007.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
007.cpp:62:5: note: in expansion of macro 'scd'
   62 |     scd(s2);
      |     ^~~
007.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
007.cpp:63:5: note: in expansion of macro 'scd'
   63 |     scd(a);
      |     ^~~
007.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
007.cpp:64:5: note: in expansion of macro 'scd'
   64 |     scd(b);
      |     ^~~
007.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
007.cpp:69:9: note: in expansion of macro 'scd'
   69 |         scd(a);
      |         ^~~
007.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
007.cpp:70:9: note: in expansion of macro 'scd'
   70 |         scd(b);
      |         ^~~

• Subtask 1: 0 / 30
• Subtask 2: 0 / 70