제출 #152894

#제출 시각아이디문제언어결과실행 시간메모리
1528942qbingxuan함수컵 박물관 (FXCUP4_museum)C++17
100 / 100
407 ms20064 KiB
#include <bits/stdc++.h>

using namespace std;
typedef int64_t ll;

int64_t CountSimilarPairs(vector<int> A,vector<int> B,vector<int> C) {
    map<int,int> a,b,c;
    map<pair<int,int>,int> ab,bc,ca;
    map<tuple<int,int,int>,int> abc;
    int n = A.size();
    ll res = 0;
    for(int i = 0; i < n; i++) res += a[A[i]]++;
    for(int i = 0; i < n; i++) res += b[B[i]]++;
    for(int i = 0; i < n; i++) res += c[C[i]]++;
    for(int i = 0; i < n; i++) res -= ab[make_pair(A[i],B[i])]++;
    for(int i = 0; i < n; i++) res -= bc[make_pair(B[i],C[i])]++;
    for(int i = 0; i < n; i++) res -= ca[make_pair(C[i],A[i])]++;
    for(int i = 0; i < n; i++) res += abc[make_tuple(A[i],B[i],C[i])]++;
    return res;
}
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