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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#620302#5301. Modulo Ruins the LegendLyniaWA 0ms3724kbC++202.2kb2024-10-07 17:25:232024-10-07 17:25:33

Judging History

你现在查看的是最新测评结果

  • [2024-10-07 17:25:33]
  • 评测
  • 测评结果:WA
  • 用时:0ms
  • 内存:3724kb
  • [2024-10-07 17:25:23]
  • 提交

answer

#include<bits/stdc++.h>
#define fa(i,op,n) for(int i=op;i<=n;i++)
#define fb(i,op,n) for(int i=op;i>=n;i--)
#define endl '\n'
#define pb push_back
using namespace std;
using ll = long long;
using pii = pair<int, int>;

const int N = 3e3 + 10;

ll exgcd(ll a, ll b, ll& x, ll& y) {
	if (b == 0) {
		x = 1, y = 0;
		return a;
	}
	ll d = exgcd(b, a % b, y, x);
	y -= a / b * x;
	return d;
}
void solve()
{
	ll n, m; cin >> n >> m;
	ll sum = 0;
	fa(i, 1, n) {
		ll now; cin >> now;
		sum += now;
	}
	sum %= m;
	if (n & 1) {
		fa(ans, 0, m) {
			ll a = n;
			ll b = m;
			ll c = ans - sum;
			ll x, y;
			ll g = exgcd(a, b, x, y);
			if (c % g != 0)continue;
			else {
				x = ((x * (c / g)) % (b / g) + (b / g)) % (b / g);
				ll xx, yy;
				ll aa = 1, bb = (n + 1) / 2;
				ll gg = exgcd(aa, bb, yy, xx);
				if (x % gg != 0)continue;
				else {
					cout << ans << endl;
					if (x > 0) {
						yy = ((yy * (x / gg)) % (x / gg) + (x / gg)) % (x / gg);
						xx = ((xx * (x / gg)) % (x / gg) + (x / gg)) % (x / gg);
					}
					cout << -xx << ' ' << yy << endl;
					return;
				}
			}
		}
	}
	else {
		ll res = 0;
		ll r = 0;
		fa(ans, 0, m) {
			ll a = n * (n + 1) / 2;
			ll b = m;
			ll c = ans - sum;
			ll x, y;
			ll g = exgcd(a, b, x, y);
			if (c % g != 0)continue;
			else {
				res = max(res, ans * 1ll);
				r = ((x * (c / g)) % (b / g) + (b / g)) % (b / g);
				//cout << ans << endl;
				//cout << 0 << ' ' << ((x * (c / g)) % (b / g) + (b / g)) % (b / g) << endl;
				break;
			}
		}

		fa(ans, 0, m) {
			ll a = n;
			ll b = m;
			ll c = ans - sum;
			ll x, y;
			ll g = exgcd(a, b, x, y);
			if (c % g != 0)continue;
			else {
				if (ans < res) {
					cout << ans << endl;
					cout << ((x * (c / g)) % (b / g) + (b / g)) % (b / g) << ' ' << 0 << endl;
				}
				else {
					cout << res << endl;
					cout << 0 << ' ' << r << endl;
				}
				//cout << ans << endl;
				//cout << 0 << ' ' << ((x * (c / g)) % (b / g) + (b / g)) % (b / g) << endl;
				return;
			}
		}
	}
	return;
}
int main() {
	ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
	int _ = 1;
	//cin >> _;
	while (_--)solve();
	return 0;
}

Details

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Test #1:

score: 100
Accepted
time: 0ms
memory: 3724kb

input:

6 24
1 1 4 5 1 4

output:

1
0 5

result:

ok ok

Test #2:

score: -100
Wrong Answer
time: 0ms
memory: 3640kb

input:

7 29
1 9 1 9 8 1 0

output:

0
0 1

result:

wrong answer Result not equal to solution.