oj.uz

Submission #914290

# Submission time Handle Problem Language Result Execution time Memory
914290 2024-01-21T14:26:49 Z Amr Joker (BOI20_joker) C++14
0 / 100
 2000 ms 25728 KB 
#include <bits/stdc++.h>
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define S second
#define F first
#define all(x) (x).begin(),(x).end()
#define sz size()
#define Yes cout << "YES" << endl
#define No cout << "NO" << endl
#define pb(x) push_back(x);
#define endl '\n'
#define fast ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
const int N=3e5+7;
ll INF=INT_MAX,mod=1e9+7;
int TT=1;
ll power(ll x, unsigned int y)
{
    ll res = 1;
    x = x; // % mod;
    if (x == 0) return 0;
    while (y > 0)
    {
        if (y & 1) res = (res*x)  ; // % mod;
        y = y>>1;
        x = (x*x) ; // % mod;
    }
    return res;
}
vector<ll> v[N];
ll dp[N];
ll vis[N];
pair<ll,ll> a[N];
bool dfs(ll x, ll par)
{
    if(vis[x])
    {
        if(dp[x]%2==dp[par]%2) return 1;
        return 0;
    }
    dp[x] = dp[par]+1;
    vis[x] = 1;
    bool ok = 0;
    for(int i = 0; i < v[x].sz; i++)
        if(v[x][i]!=par) ok|=dfs(v[x][i],x);
        return ok;
}
ll n , m , q;
void solve()
{
    cin >> n >> m >> q;
    for(int i = 1; i <= m; i++)
    {
        ll x, y; cin >> x >> y;
        a[i] = {x,y};
    }
    while(q--)
    {
        ll l , r; cin >> l >> r;
        for(int i = 1; i < N; i++) v[i].clear();
        memset(vis,0,sizeof vis);
        for(int i = 1; i <= m; i++)
        {
            if(i<l||i>r)
            {
                v[a[i].F].push_back(a[i].S);
                v[a[i].S].push_back(a[i].F);
            }
        }
        if(dfs(1,0)) cout << "YES" << endl; else cout << "NO" << endl;
    }

}
int main(){
    //freopen("friday.in","r",stdin);
    //freopen("friday.out","w",stdout);
    fast;
  //  cin >> TT;
    while(TT--)
        solve();

    return 0;
}

Compilation message

Joker.cpp: In function 'bool dfs(ll, ll)':
Joker.cpp:45:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |     for(int i = 0; i < v[x].sz; i++)
      |                      ^
Joker.cpp:45:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   45 |     for(int i = 0; i < v[x].sz; i++)
      |     ^~~
Joker.cpp:47:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   47 |         return ok;
      |         ^~~~~~

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 12380 KB Output is correct
2 Correct 4 ms 12380 KB Output is correct
3 Correct 4 ms 12380 KB Output is correct
4 Correct 4 ms 12608 KB Output is correct
5 Correct 4 ms 12376 KB Output is correct
6 Correct 10 ms 12608 KB Output is correct
7 Correct 48 ms 12380 KB Output is correct
8 Incorrect 53 ms 12616 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 12380 KB Output is correct
2 Correct 4 ms 12380 KB Output is correct
3 Correct 4 ms 12380 KB Output is correct
4 Correct 4 ms 12608 KB Output is correct
5 Correct 4 ms 12376 KB Output is correct
6 Correct 10 ms 12608 KB Output is correct
7 Correct 48 ms 12380 KB Output is correct
8 Incorrect 53 ms 12616 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 12380 KB Output is correct
2 Correct 4 ms 12380 KB Output is correct
3 Execution timed out 2016 ms 25728 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 12380 KB Output is correct
2 Correct 4 ms 12380 KB Output is correct
3 Correct 4 ms 12380 KB Output is correct
4 Correct 4 ms 12608 KB Output is correct
5 Correct 4 ms 12376 KB Output is correct
6 Correct 10 ms 12608 KB Output is correct
7 Correct 48 ms 12380 KB Output is correct
8 Incorrect 53 ms 12616 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 12380 KB Output is correct
2 Correct 4 ms 12380 KB Output is correct
3 Correct 4 ms 12380 KB Output is correct
4 Correct 4 ms 12608 KB Output is correct
5 Correct 4 ms 12376 KB Output is correct
6 Correct 10 ms 12608 KB Output is correct
7 Correct 48 ms 12380 KB Output is correct
8 Incorrect 53 ms 12616 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 12380 KB Output is correct
2 Correct 4 ms 12380 KB Output is correct
3 Correct 4 ms 12380 KB Output is correct
4 Correct 4 ms 12608 KB Output is correct
5 Correct 4 ms 12376 KB Output is correct
6 Correct 10 ms 12608 KB Output is correct
7 Correct 48 ms 12380 KB Output is correct
8 Incorrect 53 ms 12616 KB Output isn't correct
9 Halted 0 ms 0 KB -