Submission #3778857

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Source Code Expand

#include<bits/stdc++.h>
#define X first
#define Y second
#define pb emplace_back
#define FOR(i,a,b) for(int (i)=(a);i<(b);++(i))
#define EFOR(i,a,b) for(int (i)=(a);i<=(b);++(i))
#define rep(X,Y) for (int (X) = 0;(X) < (Y);++(X))
#define reps(X,S,Y) for (int (X) = S;(X) < (Y);++(X))
#define rrep(X,Y) for (int (X) = (Y)-1;(X) >=0;--(X))
#define rreps(X,S,Y) for (int (X) = (Y)-1;(X) >= (S);--(X))
#define all(X) (X).begin(),(X).end()
#define rall(X) (X).rbegin(),(X).rend()
#define eb emplace_back
#define UNIQUE(X) (X).erase(unique(all(X)),(X).end())

using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef ll LL;
typedef pii PII;
typedef pll PLL;
template<class T> using vv=vector<vector<T>>;
template<class T> inline bool MX(T &l,const T &r){return l<r?l=r,1:0;}
template<class T> inline bool MN(T &l,const T &r){return l>r?l=r,1:0;}
const ll MOD=1e9+7;

int N;
int M;
int A[114514];
vector<int> ms[2];
vector<int> ans;

int main() {
  scanf("%d%d", &N, &M);
  rep(i, M) {
    scanf("%d", &A[i]);
    ms[A[i]%2].eb(A[i]);
  }

  if (ms[1].size() > 2) {
    puts("Impossible");
    return 0;
  }

  if (M < 2) {
    printf("%d\n", A[0]);
    if (A[0] == 1) puts("1\n1");
    else printf("2\n%d %d\n", 1, A[0]-1);
    return 0;
  }

  while (ms[1].size() < 2) {
    assert(!ms[0].empty());
    ms[1].eb(ms[0].back());
    ms[0].pop_back();
  }

  ans.eb(ms[1][0]+1);
  for (int v : ms[0]) {
    ans.eb(v);
  }
  if (ms[1][1] > 1) {
    ans.eb(ms[1][1]-1);
  }

  printf("%d", ms[1][0]);
  for (int v : ms[0]) {
    printf(" %d", v);
  }
  printf(" %d\n", ms[1][1]);

  printf("%d\n", (int)ans.size());
  int K = ans.size();
  rep(i, K) {
    printf("%d%c", ans[i], " \n"[i == K-1]);
  }
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:35:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &N, &M);
                        ^
./Main.cpp:37:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &A[i]);
                       ^

Judge Result