Submission #5017697
Source Code Expand
#include <bits/stdc++.h> using namespace std; const int N = 100005; int cnt[N], sum[N]; int n, m, x, mx; int main() { scanf("%d%d", &n, &m); for (int i = 0; i < n; i++) { scanf("%d", &x); cnt[x % m]++; sum[x]++; mx = max(mx, x); } /*for(int i=0;i<m;i++) { cout << i << "->" << cnt[i] << endl; }*/ long long ans = cnt[0]/2; cnt[0] = 0; for (int i = 1; i < m; i++) { if (!cnt[i]) continue; if(i == m-i) { //cout << "add " << cnt[i]/2 << " at " << i << endl; ans += cnt[i]/2; cnt[i] %= 2; } else { int res = min(cnt[i], cnt[m-i]); //cout << "add " << res << " at " << i << endl; ans += res; cnt[i] -= res, cnt[m-i] -= res; } } for(int i=0;i<=mx;i++) { int pair = min(sum[i], cnt[i%m]); //cout << "pair " << pair << " at " << i << endl; //cout << sum[i] << "," << cnt[i%m] << endl; if(pair < 2) continue; cnt[i%m] -= pair/2*2; sum[i] -= pair/2*2; ans += pair/2; } cout << ans << endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | D - Pair Cards |
User | vjudge4 |
Language | C++14 (GCC 5.4.1) |
Score | 700 |
Code Size | 1156 Byte |
Status | AC |
Exec Time | 13 ms |
Memory | 1024 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:7:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ ./Main.cpp:9:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^
Judge Result
Set Name | sample | all | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 700 / 700 | ||||
Status |
|
|
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 | 11 ms | 640 KB |
01-03.txt | AC | 12 ms | 640 KB |
01-04.txt | AC | 12 ms | 640 KB |
01-05.txt | AC | 11 ms | 640 KB |
01-06.txt | AC | 12 ms | 640 KB |
01-07.txt | AC | 12 ms | 640 KB |
01-08.txt | AC | 11 ms | 640 KB |
01-09.txt | AC | 12 ms | 640 KB |
01-10.txt | AC | 12 ms | 768 KB |
01-11.txt | AC | 13 ms | 1024 KB |
01-12.txt | AC | 11 ms | 256 KB |
01-13.txt | AC | 11 ms | 256 KB |
01-14.txt | AC | 11 ms | 640 KB |
01-15.txt | AC | 11 ms | 640 KB |
01-16.txt | AC | 11 ms | 640 KB |
01-17.txt | AC | 11 ms | 640 KB |
01-18.txt | AC | 11 ms | 640 KB |
01-19.txt | AC | 12 ms | 640 KB |
01-20.txt | AC | 12 ms | 1024 KB |
01-21.txt | AC | 11 ms | 640 KB |
01-22.txt | AC | 11 ms | 640 KB |
01-23.txt | AC | 11 ms | 640 KB |
01-24.txt | AC | 11 ms | 640 KB |
01-25.txt | AC | 12 ms | 768 KB |
01-26.txt | AC | 12 ms | 1024 KB |
01-27.txt | AC | 7 ms | 896 KB |
01-28.txt | AC | 2 ms | 1024 KB |
01-29.txt | AC | 2 ms | 768 KB |
01-30.txt | AC | 2 ms | 384 KB |
sample-01.txt | AC | 1 ms | 256 KB |
sample-02.txt | AC | 1 ms | 256 KB |