Submission #743171

#	Time	Username	Problem	Language	Result	Execution time	Memory
743171		vjudge1	Lightning Rod (NOI18_lightningrod)	C++17	0 / 100	1538 ms	262144 KiB

Main

#include <bits/stdc++.h>
#define x first
#define y second
using namespace std;
const int N = 1e7 + 1;
pair<int,int> arr[N];
inline void read(int &x)
{
    x = 0;
    char ch = getchar_unlocked();
    while (ch & 16)
    {
        x = (x << 3) + (x << 1) + (ch & 15);
        ch = getchar_unlocked();
    }
}
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);
    int n,ans=0; read(n);
    for(int i=1;i<=n;i++) {
        read(arr[i].x);
        read(arr[i].y);
    }
    set<int> s;
    for(int i=1;i<=n;i++) s.insert(arr[i].x);
    cout << s.size();
    return 0;
}

Compilation message (stderr)

lightningrod.cpp: In function 'int main()':
lightningrod.cpp:20:11: warning: unused variable 'ans' [-Wunused-variable]
   20 |     int n,ans=0; read(n);
      |           ^~~

• Subtask 1: 0 / 4
• Subtask 2: 0 / 7
• Subtask 3: 0 / 12
• Subtask 4: 0 / 21
• Subtask 5: 0 / 26
• Subtask 6: 0 / 10
• Subtask 7: 0 / 20