提出 #4101681

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ソースコード 拡げる

#include <cstdio>
#include <vector>
#include <string>
#include <queue>
#include <cstring>
#include <algorithm>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, int> pli;

int main() {
  int n; scanf("%d", &n);
  ll a[n], b[n];
  pli d[n];
  for (int i = 0; i < n; ++i) {
    scanf("%lld%lld", a+i, b+i);
    d[i] = make_pair(a[i]-b[i], i);
  }
  ll ans=0;
  sort(d,d+n);
  for (int i = 0; i < n; ++i) {
    int idx = d[i].second;
    if (i%2==0) {
      ans+=a[idx];
    } else {
      ans-=b[idx];
    }
  }
  printf("%lld\n", ans);
  return 0;
}

提出情報

コンパイルエラー

./Main.cpp: In function ‘int main()’:
./Main.cpp:14:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   int n; scanf("%d", &n);
                         ^
./Main.cpp:18:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld%lld", a+i, b+i);
                                ^

ジャッジ結果