Submission #1269853


Source Code Expand

#include <cstdio>
#include <cstring>
#include <iostream>
using namespace std;

const int N = 202020;

inline char get(void) {
	static char buf[100000], *S = buf, *T = buf;
	if (S == T) {
		T = (S = buf) + fread(buf, 1, 100000, stdin);
		if (S == T) return EOF;
	}
	return *S++;
}
template<typename T>
inline void read(T &x) {
	static char c; x = 0; int sgn = 0;
	for (c = get(); c < '0' || c > '9'; c = get()) if (c == '-') sgn = 1;
	for (; c >= '0' && c <= '9'; c = get()) x = x * 10 + c - '0';
	if (sgn) x = -x;
}

int n;
int p[N], q[N];
int f[N], T[N];

inline bool Check(int a, int b, int c) {
	return (a < b && b < c) || (b < c && c < a) || (c < a && a < b);
}

int main(void) {
	read(n);
	for (int i = 1; i <= n; i++) {
		read(p[i]); q[p[i]] = i;
	}
	T[n] = 0;
	for (int i = n - 1; i; i--) {
		if (T[i + 1] == 0) {
			if (q[i] > q[i + 1]) {
				T[i] = 1; f[i] = i + 1;
			}
		} else {
			if (Check(q[f[i + 1]], q[i], q[i + 1])) {
				T[i] = T[i + 1]; f[i] = f[i + 1];
			} else {
				T[i] = T[i + 1] + 1; f[i] = i + 1;
			}
		}
	}
	cout << T[1] << endl;
}

Submission Info

Submission Time
Task F - Strange Sorting
User Vectorxj
Language C++14 (GCC 5.4.1)
Score 2400
Code Size 1112 Byte
Status AC
Exec Time 8 ms
Memory 3456 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 2400 / 2400
Status
AC × 3
AC × 29
Set Name Test Cases
Sample sample1.txt, sample2.txt, sample3.txt
All sample1.txt, sample2.txt, sample3.txt, in1.txt, in10.txt, in11.txt, in12.txt, in13.txt, in14.txt, in15.txt, in16.txt, in17.txt, in18.txt, in19.txt, in2.txt, in20.txt, in21.txt, in22.txt, in23.txt, in3.txt, in4.txt, in5.txt, in6.txt, in7.txt, in8.txt, in9.txt, sample1.txt, sample2.txt, sample3.txt
Case Name Status Exec Time Memory
in1.txt AC 8 ms 3456 KB
in10.txt AC 8 ms 3456 KB
in11.txt AC 8 ms 3456 KB
in12.txt AC 8 ms 3456 KB
in13.txt AC 8 ms 3456 KB
in14.txt AC 8 ms 3456 KB
in15.txt AC 8 ms 3456 KB
in16.txt AC 8 ms 3456 KB
in17.txt AC 8 ms 3456 KB
in18.txt AC 8 ms 3456 KB
in19.txt AC 8 ms 3456 KB
in2.txt AC 8 ms 3456 KB
in20.txt AC 8 ms 3456 KB
in21.txt AC 4 ms 1920 KB
in22.txt AC 5 ms 3456 KB
in23.txt AC 1 ms 256 KB
in3.txt AC 8 ms 3456 KB
in4.txt AC 8 ms 3456 KB
in5.txt AC 8 ms 3456 KB
in6.txt AC 8 ms 3456 KB
in7.txt AC 8 ms 3456 KB
in8.txt AC 8 ms 3456 KB
in9.txt AC 8 ms 3456 KB
sample1.txt AC 1 ms 256 KB
sample2.txt AC 1 ms 256 KB
sample3.txt AC 1 ms 256 KB