提出 #8226893

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ソースコード 拡げる

#include<bits/stdc++.h>
#define fo(i, x, y) for(int i = x, B = y; i <= B; i ++)
#define ff(i, x, y) for(int i = x, B = y; i <  B; i ++)
#define fd(i, x, y) for(int i = x, B = y; i >= B; i --)
#define ll long long
#define pp printf
#define hh pp("\n")
using namespace std;

const int N = 2e5 + 5;

int n, mo, a[N], as;

int calc(int m) {
	int ans = 0;
	fo(i, 1, m) ans = max(ans, (a[i] + a[2 * m - i + 1]) % mo);
	fo(i, 1, n - m) ans = max(ans, (a[2 * m + i] + a[2 * n - i + 1]) % mo);
	return ans;
}

int main() {
	scanf("%d %d", &n, &mo);
	fo(i, 1, 2 * n) scanf("%d", &a[i]);
	sort(a + 1, a + 2 * n + 1);
	int as = 0;
	for(int l = 0, r = n; l <= r; ) {
		int m = l + r >> 1;
		int ye = 1;
		fo(i, 1, n - m) if(a[2 * m + i] + a[2 * n - i + 1] < mo) ye = 0;
		if(ye) {
			as = m;
			r = m - 1;
			continue;
		}
		l = m + 1;
	}
	int ans = calc(as);
	if(as < n) ans = min(ans, calc(as + 1));
	pp("%d\n", ans);
}

提出情報

コンパイルエラー

./Main.cpp: In function ‘int main()’:
./Main.cpp:22:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &mo);
                         ^
./Main.cpp:23:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  fo(i, 1, 2 * n) scanf("%d", &a[i]);
                                    ^

ジャッジ結果