Submission #6734426


Source Code Expand

Copy
#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)
#define fore(i,a) for(auto &i:a)
#define all(x) (x).begin(),(x).end()
//#pragma GCC optimize ("-O3")
using namespace std; void _main(); int main() { cin.tie(0); ios::sync_with_stdio(false); _main(); }
typedef long long ll; const int inf = INT_MAX / 2; const ll infl = 1LL << 60;
template<class T>bool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; }
template<class T>bool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; }
//---------------------------------------------------------------------------------------------------
/*---------------------------------------------------------------------------------------------------
            ∧_∧
      ∧_∧  (´<_` )  Welcome to My Coding Space!
     ( ´_ゝ`) /  ⌒i     @hamayanhamayan
    /   \     | |
    /   / ̄ ̄ ̄ ̄/  |
  __(__ニつ/     _/ .| .|____
     \/____/ (u ⊃
---------------------------------------------------------------------------------------------------*/














int N, A[101010];
//---------------------------------------------------------------------------------------------------
#define yes "Yes"
#define no "No"
string solve() {
	rrep(i, N - 2, 0) {
		if (A[i] > A[i + 1] + 1) return no;
		else if (A[i] == A[i + 1] + 1) A[i]--;
	}
	return yes;
}
//---------------------------------------------------------------------------------------------------
void _main() {
	cin >> N;
	rep(i, 0, N) cin >> A[i];
	cout << solve() << endl;
}





Submission Info

Submission Time
Task C - Build Stairs
User hamayanhamayan
Language C++14 (GCC 5.4.1)
Score 300
Code Size 1775 Byte
Status AC
Exec Time 13 ms
Memory 640 KB

Judge Result

Set Name All Sample
Score / Max Score 300 / 300 0 / 0
Status
AC × 17
AC × 4
Set Name Test Cases
All sample_01, sample_02, sample_03, sample_04, testcase_01, testcase_02, testcase_03, testcase_04, testcase_05, testcase_06, testcase_07, testcase_08, testcase_09, testcase_10, testcase_11, testcase_12, testcase_13
Sample sample_01, sample_02, sample_03, sample_04
Case Name Status Exec Time Memory
sample_01 AC 1 ms 256 KB
sample_02 AC 1 ms 256 KB
sample_03 AC 1 ms 256 KB
sample_04 AC 1 ms 256 KB
testcase_01 AC 7 ms 512 KB
testcase_02 AC 11 ms 640 KB
testcase_03 AC 12 ms 640 KB
testcase_04 AC 12 ms 640 KB
testcase_05 AC 4 ms 384 KB
testcase_06 AC 5 ms 384 KB
testcase_07 AC 13 ms 640 KB
testcase_08 AC 9 ms 640 KB
testcase_09 AC 9 ms 640 KB
testcase_10 AC 11 ms 640 KB
testcase_11 AC 11 ms 640 KB
testcase_12 AC 1 ms 256 KB
testcase_13 AC 12 ms 640 KB