Submission #152894

#	Time	Username	Problem	Language	Result	Execution time	Memory
152894		2qbingxuan	FunctionCup Museum (FXCUP4_museum)	C++17	100 / 100	407 ms	20064 KiB

museum

#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;
}

• Subtask 1: 27 / 27
• Subtask 2: 73 / 73