AtCoder Grand Contest 009

Submission #4033199

Source codeソースコード

#include<stdio.h>
#include<iostream>
#include<vector>
#include<algorithm>
#include<string>
#include<string.h>
using namespace std;

typedef long long LL;
typedef vector<int> VI;

#define REP(i,n) for(int i=0, i##_len=(n); i<i##_len; ++i)
#define EACH(i,c) for(__typeof((c).begin()) i=(c).begin(),i##_end=(c).end();i!=i##_end;++i)
#define eprintf(...) fprintf(stderr, __VA_ARGS__)

template<class T> inline void amin(T &x, const T &y) { if (y<x) x=y; }
template<class T> inline void amax(T &x, const T &y) { if (x<y) x=y; }
template<class Iter> void rprintf(const char *fmt, Iter begin, Iter end) {
    for (bool sp=0; begin!=end; ++begin) { if (sp) putchar(' '); else sp = true; printf(fmt, *begin); }
    putchar('\n');
}

int N;
VI G[100011];
int par[100011];
int dp[100011];
VI ord;

void MAIN() {
    scanf("%d", &N);
    REP (i, N-1) {
	int x;
	scanf("%d", &x);
	x--;
	G[x].push_back(i+1);
	G[i+1].push_back(x);
    }

    ord.reserve(N);
    ord.push_back(0);
    REP (i_, N) {
	int v = ord[i_];
	EACH (e, G[v]) if (*e != par[v]) {
	    par[*e] = v;
	    ord.push_back(*e);
	}
    }

    VI t; t.reserve(N);
    REP (i_, N) {
	int v = ord[N-1-i_];
	t.clear();
	EACH (e, G[v]) if (*e != par[v]) {
	    t.push_back(dp[*e]);
	}

	sort(t.begin(), t.end());
	reverse(t.begin(), t.end());
	dp[v] = 0;
	REP (i, t.size()) amax(dp[v], t[i] + i + 1);
    }

    printf("%d\n", dp[0]);
}

int main() {
    int TC = 1;
//    scanf("%d", &TC);
    REP (tc, TC) MAIN();
    return 0;
}

Submission

Task問題 B - Tournament
User nameユーザ名 n
Created time投稿日時
Language言語 C++14 (GCC 5.4.1)
Status状態 AC
Score得点 800
Source lengthソースコード長 1551 Byte
File nameファイル名
Exec time実行時間 34 ms
Memory usageメモリ使用量 7672 KB

Compiler messageコンパイルメッセージ

./Main.cpp: In function ‘void MAIN()’:
./Main.cpp:30:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &N);
^
./Main.cpp:33:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &x);
^

Test case

Set

Set name Score得点 / Max score Cases
Sample - s1.txt,s2.txt,s3.txt
All 800 / 800 01.txt,02.txt,03.txt,04.txt,05.txt,06.txt,07.txt,08.txt,09.txt,10.txt,11.txt,12.txt,13.txt,14.txt,15.txt,16.txt,17.txt,18.txt,19.txt,20.txt,21.txt,22.txt,23.txt,24.txt,25.txt,26.txt,27.txt,28.txt,29.txt,30.txt,31.txt,32.txt,33.txt,34.txt,35.txt,36.txt,37.txt,38.txt,39.txt,40.txt,41.txt,42.txt,43.txt,44.txt,45.txt,46.txt,47.txt,48.txt,49.txt,50.txt,s1.txt,s2.txt,s3.txt

Test case

Case name Status状態 Exec time実行時間 Memory usageメモリ使用量
01.txt AC 33 ms 7040 KB
02.txt AC 34 ms 7040 KB
03.txt AC 33 ms 7040 KB
04.txt AC 34 ms 7040 KB
05.txt AC 33 ms 7040 KB
06.txt AC 33 ms 7040 KB
07.txt AC 33 ms 7040 KB
08.txt AC 33 ms 7040 KB
09.txt AC 33 ms 7040 KB
10.txt AC 33 ms 7040 KB
11.txt AC 25 ms 6912 KB
12.txt AC 26 ms 6912 KB
13.txt AC 26 ms 6912 KB
14.txt AC 26 ms 6912 KB
15.txt AC 26 ms 6912 KB
16.txt AC 26 ms 6912 KB
17.txt AC 26 ms 6912 KB
18.txt AC 27 ms 6912 KB
19.txt AC 27 ms 6912 KB
20.txt AC 28 ms 6912 KB
21.txt AC 20 ms 7672 KB
22.txt AC 20 ms 7416 KB
23.txt AC 20 ms 7412 KB
24.txt AC 21 ms 7424 KB
25.txt AC 21 ms 7424 KB
26.txt AC 22 ms 7424 KB
27.txt AC 22 ms 7424 KB
28.txt AC 24 ms 7424 KB
29.txt AC 25 ms 7424 KB
30.txt AC 25 ms 7424 KB
31.txt AC 25 ms 6912 KB
32.txt AC 24 ms 6912 KB
33.txt AC 24 ms 7296 KB
34.txt AC 23 ms 7168 KB
35.txt AC 23 ms 7424 KB
36.txt AC 22 ms 7552 KB
37.txt AC 22 ms 7296 KB
38.txt AC 21 ms 7424 KB
39.txt AC 20 ms 7424 KB
40.txt AC 20 ms 7296 KB
41.txt AC 3 ms 2560 KB
42.txt AC 3 ms 2560 KB
43.txt AC 3 ms 2560 KB
44.txt AC 3 ms 2560 KB
45.txt AC 3 ms 2560 KB
46.txt AC 3 ms 2560 KB
47.txt AC 3 ms 2560 KB
48.txt AC 3 ms 2560 KB
49.txt AC 3 ms 2560 KB
50.txt AC 3 ms 2560 KB
s1.txt AC 3 ms 2560 KB
s2.txt AC 3 ms 2560 KB
s3.txt AC 3 ms 2560 KB