Submission #859902

#	Time	Username	Problem	Language	Result	Execution time	Memory
859902		AtabayRajabli	Star triangles (IZhO11_triangle)	C++11	100 / 100	434 ms	30236 KiB

triangle

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

// author : AtabeyR

#define pb          push_back
#define pii         pair<int, int>
#define pll         pair<ll, ll>
#define all(v)      v.begin(), v.end()
#define OPT         ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define sec         second
#define fi          first
#define int         ll
#define print(k)    cerr << "Ans : "; cout << k << endl;
#define ins         insert
#define bpc         __builtin_popcountll
#define skip        continue
#define endll        "\n"
#define li          2*ind+1
#define ri          2*ind+2
#define lb          lower_bound
#define ub          upper_bound

typedef long long ll;
typedef unsigned long long ull;
const int oo = 0x3F3F3F3F;
const int ooo = 0x3F3F3F3F3F3F3F3FLL;
const int mod = 998244353;
const int sz = 3e5+6;
using namespace std;
using namespace __gnu_pbds;
template<class T> using ordered_set = tree<T, null_type,less<T>, rb_tree_tag,tree_order_statistics_node_update>;

int lcm(int a, int b)
{
    return a*b / (__gcd(a, b));
}
int gcd(int a, int b)
{
    return __gcd(a, b);
}

int n, m, k;

void proud(int balls)
{
    cin >> n;

    vector<int> x, y;
    map<int, int> mx, my;
    map<pii, int> mp;
    for(int i = 1; i<=n; i++)
    {
        int xx, yy;
        cin >> xx >> yy;

        mx[xx]++;
        my[yy]++;
        mp[pii(xx, yy)]++;
    }

    int res = 0;
    for(pair<pii, int> p : mp)
    {
        int c1 = mx[p.fi.fi] - 1;
        int c2 = my[p.fi.sec] - 1;

        res += c1 * c2 * p.sec;
    }

    cout << res << endll;
}

int32_t main()  
{

    // freopen("i.txt", "r", stdin);
    // freopen("o.txt", "w", stdout);

    OPT
    int t = 1;
    //cin >> t;

    for(int i = 1; i<=t; i++)
        proud(i);
}

• Subtask 1: 100 / 100