模拟赛SXJ202511061800比赛记录&题解

题目请看

最近被一些模拟赛蹂躏了，这场是来思路来的最快的一场比赛

T1

So easy,but...

很简单，判差值和数量即可，我却漏了细节，82point，磕细节磕了1h，才想出正解，64行

贴一下代码

/*
User:Kevinrzy103874
Uid:72
Age:12
*/
#include <bits/stdc++.h>
using namespace std;
#define fre(c) freopen(c".in","r",stdin);freopen(c".out","w",stdout);
#define ll long long
#define endl "\n"
#define ios ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);
#define cst const
cst ll N = 1e5 + 5;
bool flag = true;
ll n, a[N], sum;
inline ll read() {
	char c;
	ll sum = 0, f = 1;
	c = getchar();
	while (!isdigit(c)) {
		if (c == '-')
			f *= -1;
		c = getchar();
	}
	while (isdigit(c)) {
		sum = sum * 10 + (c - '0');
		c = getchar();
	}
	return sum * f;
}
int main() {
	// ios
	fre("rose")
	n = read();
	for (ll i = 1; i <= n; i ++) {
		a[i] = read();
		if (a[i] < a[i - 1]) {
			// cout << 111;
			a[i] ++;
			sum ++;
			if (a[i - 1] - a[i] > 1 && i - 1 != 0) {
				cout << "No";
				return 0;
			}
		}
		// cout << a[i] << endl;
	}
	for (ll i = 1; i <= n; i ++) {
		if (a[i] < a[i - 1]) {
			flag = false;
			break ;
		}
	}
	if (flag) {
		cout << "Yes";
		return 0;
	}
	if (sum > 1) {
		cout << "No";
		return 0;
	}
	cout << "Yes";
	return 0;
}

赛时：100point

赛后：-point

T2

贴一下代码

赛时：point

赛后：point

T3

贴一下代码

赛时：point

赛后：point

T4

贴一下代码

赛时：point

赛后：point

T5

贴一下代码

赛时：point

赛后：point

T6

贴一下代码

赛时：point

赛后：point

T7

贴一下代码

赛时：point

赛后：point

T8

贴一下代码

赛时：point

赛后：point