Submission #992553


Source Code Expand

#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < n; i++)
#define PI       3.1415926535897932384626433832795028841971
#define INF      100000000
#define EPS      1e-10
#define MOD      1000000007
using namespace std;
typedef long long ll;
typedef pair<ll,ll> P;

ll n, m;
ll x[100001];
ll hoge[100001];
map<ll,ll> ma;
map<ll,ll>::iterator it;

int main(){
    cin >> n >> m;
    rep(i,n){
        ll y;
        cin >> y;
        ma[y]++;
        x[y%m]++;
    }
    for(it = ma.begin(); it != ma.end(); it++){
        ll p = (*it).first, q = (*it).second;
        hoge[p%m] += q/2;
    }
    ll ans = 0;
    rep(i,n-1){
        ans += min(x[i+1],x[m-i-1]);
        ll z = min(x[i+1],x[m-i-1]);
        x[i+1] -= z;
        x[m-i-1] -= z;
    }
    rep(i,n){
        ans += min(hoge[i],x[i]/2);
    }
    cout << ans << endl;
}

Submission Info

Submission Time
Task D - Pair Cards
User gasin
Language C++14 (GCC 5.4.1)
Score 0
Code Size 878 Byte
Status WA
Exec Time 91 ms
Memory 8064 KB

Judge Result

Set Name sample all
Score / Max Score 0 / 0 0 / 700
Status
AC × 2
AC × 10
WA × 22
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
Case Name Status Exec Time Memory
01-01.txt WA 2 ms 256 KB
01-02.txt WA 81 ms 5760 KB
01-03.txt WA 81 ms 5760 KB
01-04.txt WA 81 ms 5760 KB
01-05.txt WA 79 ms 5760 KB
01-06.txt WA 79 ms 5760 KB
01-07.txt WA 82 ms 5760 KB
01-08.txt WA 80 ms 5760 KB
01-09.txt WA 81 ms 5760 KB
01-10.txt AC 74 ms 5760 KB
01-11.txt WA 81 ms 5760 KB
01-12.txt AC 48 ms 1792 KB
01-13.txt AC 48 ms 1408 KB
01-14.txt WA 89 ms 8064 KB
01-15.txt WA 91 ms 8064 KB
01-16.txt WA 86 ms 8064 KB
01-17.txt WA 90 ms 8064 KB
01-18.txt WA 91 ms 8064 KB
01-19.txt WA 90 ms 8064 KB
01-20.txt WA 90 ms 8064 KB
01-21.txt WA 58 ms 2048 KB
01-22.txt WA 57 ms 2048 KB
01-23.txt WA 57 ms 2048 KB
01-24.txt AC 58 ms 2048 KB
01-25.txt AC 55 ms 2048 KB
01-26.txt AC 57 ms 2048 KB
01-27.txt AC 43 ms 4480 KB
01-28.txt WA 6 ms 2048 KB
01-29.txt WA 4 ms 896 KB
01-30.txt AC 3 ms 384 KB
sample-01.txt AC 3 ms 256 KB
sample-02.txt AC 3 ms 256 KB