Submission #59250106

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
const int N = 105;
int a[N], t[N];
int main() {
  int n;
  scanf("%d", &n);
  int mx = 0;
  for (int i = 1; i <= n; ++i) {
    scanf("%d", &a[i]);
    ++t[a[i]];
    mx = max(mx, a[i]);
  }

  auto solve = [&]() -> bool {
    for (int i = 1; i < (mx + 1) / 2; ++i) {
      if (t[i]) return false;
    }
    if (!(mx & 1) && t[mx / 2] != 1) return false;
    if ((mx & 1) && t[(mx + 1) / 2] != 2) return false;
    for (int i = mx / 2 + 1; i <= mx; ++i) {
      if (t[i] < 2) return false;
    }
    return true;
  };

  puts(solve() ? "Possible" : "Impossible");
}

Submission Info

Compile Error

Main.cpp: In function ‘int main()’:
Main.cpp:7:8: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
    7 |   scanf("%d", &n);
      |   ~~~~~^~~~~~~~~~
Main.cpp:10:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   10 |     scanf("%d", &a[i]);
      |     ~~~~~^~~~~~~~~~~~~

Judge Result