Submission #1751785

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Source Code Expand

//2017-11-7
//miaomiao
//
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <iostream>
#include <algorithm>
#include <cassert>

using namespace std;

#define LL long long
#define For(i, a, b) for(int i = (a); i <= (int)(b); ++i)

#define N (100000+5)

bool Check(int a, int b, int c){
	if(a > c) swap(a, c);
	if(b != a+1 || c != a+2) return false;
	if(a % 3 != 1) return false;
	return true;
}

int a[N][5], num[N];
bool op[N], rev[2], swp[2];

int main(){
	int n;

	scanf("%d", &n);
	For(j, 1, 3) For(i, 1, n) scanf("%d", &a[i][j]);
	
	For(i, 1, n) if(!Check(a[i][1], a[i][2], a[i][3])){
		puts("No"); return 0;
	}

	For(i, 1, n){
		num[i] = max(a[i][1], a[i][3]) / 3;
		op[i] = a[i][1] > a[i][3];
		if((num[i]&1) ^ (i&1)){
			puts("No"); return 0;
		}
	}

//	For(i, 1, n) printf("%d%c\n", num[i], op[i]? '-': '+');
//	puts("");

	int t;

	For(i, 1, n) rev[i&1] ^= op[i];
	For(i, 1, n) if(i != num[i]){
		t = num[i]; swap(num[i], num[t]);
		swp[i&1] ^= 1;
	}
	
	assert(false);
	if((swp[0] ^ rev[1]) || (swp[1] ^ rev[0])) puts("No");
	else puts("Yes");

	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:32:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
                 ^
./Main.cpp:33:49: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  For(j, 1, 3) For(i, 1, n) scanf("%d", &a[i][j]);
                                                 ^

Judge Result