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Submission #847648

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```#include <bits/stdc++.h>
#define SZ(X) ((int)(X).size())
#define ALL(X) (X).begin(), (X).end()
#define REP(I, N) for (int I = 0; I < (N); ++I)
#define REPP(I, A, B) for (int I = (A); I < (B); ++I)
#define RI(X) scanf("%d", &(X))
#define RII(X, Y) scanf("%d%d", &(X), &(Y))
#define RIII(X, Y, Z) scanf("%d%d%d", &(X), &(Y), &(Z))
#define DRI(X) int (X); scanf("%d", &X)
#define DRII(X, Y) int X, Y; scanf("%d%d", &X, &Y)
#define DRIII(X, Y, Z) int X, Y, Z; scanf("%d%d%d", &X, &Y, &Z)
#define RS(X) scanf("%s", (X))
#define CASET int ___T, case_n = 1; scanf("%d ", &___T); while (___T-- > 0)
#define MP make_pair
#define PB push_back
#define MS0(X) memset((X), 0, sizeof((X)))
#define MS1(X) memset((X), -1, sizeof((X)))
#define LEN(X) strlen(X)
#define PII pair<int,int>
#define VI vector<int>
#define VPII vector<pair<int,int> >
#define PLL pair<long long,long long>
#define VPLL vector<pair<long long,long long> >
#define F first
#define S second
typedef long long LL;
using namespace std;
const int MOD = 1e9+7;
const int SIZE = 1e6+10;
int main(){
LL an=0, lt=0;
DRI(N);
REP(i,N){
DRI(x);
if(lt&&x)an++,x--;
an+=x/2;lt=x%2;
}cout<<an<<endl;
return 0;
}```

#### Submission Info

Submission Time 2016-08-21 22:18:59+0900 B - Simplified mahjong dreamoon C++14 (GCC 5.4.1) 400 1205 Byte AC 25 ms 256 KB

#### Compile Error

```./Main.cpp: In function ‘int main()’:
./Main.cpp:32:8: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
DRI(N);
^
./Main.cpp:34:9: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
DRI(x);
^
```

#### Judge Result

Set Name Sample All
Score / Max Score 0 / 0 400 / 400
Status
 AC × 2
 AC × 24
Set Name Test Cases
Sample s1.txt, s2.txt
All 01.txt, 02.txt, 03.txt, 04.txt, 05.txt, 06.txt, 07.txt, 08.txt, 09.txt, 10.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, 20.txt, 21.txt, 22.txt, s1.txt, s2.txt
Case Name Status Exec Time Memory
01.txt AC 24 ms 256 KB
02.txt AC 25 ms 256 KB
03.txt AC 25 ms 256 KB
04.txt AC 21 ms 256 KB
05.txt AC 22 ms 256 KB
06.txt AC 22 ms 256 KB
07.txt AC 24 ms 256 KB
08.txt AC 24 ms 256 KB
09.txt AC 25 ms 256 KB
10.txt AC 25 ms 256 KB
11.txt AC 16 ms 256 KB
12.txt AC 25 ms 256 KB
13.txt AC 24 ms 256 KB
14.txt AC 25 ms 256 KB
15.txt AC 16 ms 256 KB
16.txt AC 25 ms 256 KB
17.txt AC 25 ms 256 KB
18.txt AC 4 ms 256 KB
19.txt AC 4 ms 256 KB
20.txt AC 4 ms 256 KB
21.txt AC 4 ms 256 KB
22.txt AC 4 ms 256 KB
s1.txt AC 4 ms 256 KB
s2.txt AC 4 ms 256 KB