Submission #743153

#	Time	Username	Problem	Language	Result	Execution time	Memory
743153		vjudge1	Lightning Rod (NOI18_lightningrod)	C++17	0 / 100	2097 ms	262144 KiB

Main

#include <iostream>
#include <unordered_map>
using namespace std;

inline void read(long long &x)
{
    x = 0;
    char ch = getchar_unlocked();
    while (ch & 16)
    {
        x = (x << 3) + (x << 1) + (ch & 15);
        ch = getchar_unlocked();
    }
}

int main ()
{
    unordered_map<int,int> ma;
    long long n, a, b, sum = 0;
    read(n);
    for(long long i = 0;i < n;++i)
    {
        read(a);
        read(b);
        if(ma[a] == 0)
        {
            ma[a] = 1;
            sum++;
        }
    }
    cout << sum;
}

• 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