Submission #7345339
Source Code Expand
#include <bits/stdc++.h> using namespace std; const int MOD=1e9+7; //const int MOD=998244353; const int INF=1e9; const long long LINF=1e18; #define int long long //template template <typename T> void fin(T a){ cout<<a<<endl; exit(0); } //main signed main(){ int N,M;cin>>N>>M; std::vector<int> v(N); for(int i=0;i<N;i++)cin>>v[i]; if(M==1)fin(N/2); std::vector<int> w(M,0); for(int i=0;i<N;i++)w[v[i]%M]++; int ans=0; std::vector<int> use(M,0); for(int i=1;i<(M+1)/2;i++){ int res=min(w[i],w[M-i]); ans+=res;use[i]+=res;use[M-i]+=res; } ans+=w[0]/2; if(M&1==0)ans+=w[M/2]/2; map<int,int> m; for(int i=0;i<N;i++)m[v[i]]++; std::vector<int> no(M); for(auto p:m)if(p.second&1)no[p.first%M]++; for(int i=0;i<M;i++)ans+=(w[i]-max(no[i],use[i]))/2; fin(ans); }
Submission Info
Submission Time | |
---|---|
Task | D - Pair Cards |
User | drogskol |
Language | C++14 (GCC 5.4.1) |
Score | 0 |
Code Size | 839 Byte |
Status | WA |
Exec Time | 66 ms |
Memory | 9600 KB |
Judge Result
Set Name | sample | all | ||||||
---|---|---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 0 / 700 | ||||||
Status |
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|
Set Name | Test Cases |
---|---|
sample | sample-01.txt, sample-02.txt |
all | sample-01.txt, sample-02.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt, 01-11.txt, 01-12.txt, 01-13.txt, 01-14.txt, 01-15.txt, 01-16.txt, 01-17.txt, 01-18.txt, 01-19.txt, 01-20.txt, 01-21.txt, 01-22.txt, 01-23.txt, 01-24.txt, 01-25.txt, 01-26.txt, 01-27.txt, 01-28.txt, 01-29.txt, 01-30.txt, sample-01.txt, sample-02.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
01-01.txt | AC | 1 ms | 256 KB |
01-02.txt | AC | 28 ms | 1024 KB |
01-03.txt | WA | 57 ms | 4992 KB |
01-04.txt | WA | 57 ms | 4992 KB |
01-05.txt | WA | 55 ms | 4992 KB |
01-06.txt | WA | 57 ms | 4992 KB |
01-07.txt | WA | 57 ms | 4992 KB |
01-08.txt | WA | 57 ms | 4992 KB |
01-09.txt | WA | 55 ms | 4992 KB |
01-10.txt | WA | 58 ms | 5888 KB |
01-11.txt | WA | 58 ms | 7296 KB |
01-12.txt | AC | 30 ms | 1024 KB |
01-13.txt | AC | 31 ms | 2048 KB |
01-14.txt | WA | 63 ms | 7296 KB |
01-15.txt | AC | 62 ms | 7296 KB |
01-16.txt | WA | 61 ms | 7296 KB |
01-17.txt | AC | 63 ms | 7296 KB |
01-18.txt | AC | 62 ms | 7296 KB |
01-19.txt | AC | 63 ms | 7552 KB |
01-20.txt | AC | 66 ms | 9600 KB |
01-21.txt | WA | 38 ms | 1280 KB |
01-22.txt | WA | 38 ms | 1280 KB |
01-23.txt | WA | 38 ms | 1280 KB |
01-24.txt | WA | 38 ms | 1280 KB |
01-25.txt | AC | 38 ms | 2048 KB |
01-26.txt | AC | 39 ms | 3584 KB |
01-27.txt | AC | 31 ms | 6144 KB |
01-28.txt | AC | 4 ms | 2816 KB |
01-29.txt | AC | 2 ms | 1280 KB |
01-30.txt | AC | 3 ms | 2560 KB |
sample-01.txt | AC | 1 ms | 256 KB |
sample-02.txt | AC | 1 ms | 256 KB |