Submission #78568

#	Time	Username	Problem	Language	Result	Execution time	Memory
78568		hamzqq9	Sailing Race (CEOI12_race)	C++14	40 / 100	667 ms	5552 KiB

race

#include<bits/stdc++.h>
#define st first
#define nd second
#define pb push_back
#define ppb pop_back
#define umax(x,y) x=max(x,y)
#define umin(x,y) x=min(x,y)
#define ll long long
#define ii pair<int,int>
#define iii pair<ii,int>
#define iiii pair<ii,ii>
#define sz(x) ((int) x.size())
#define orta ((bas+son)>>1)
#define all(x) x.begin(),x.end()
#define dbgs(x) cerr<<(#x)<<" --> "<<(x)<<" "
#define dbg(x) cerr<<(#x)<<" --> "<<(x)<<endl;getchar()
#define pw(x) (1<<(x))
#define inf 2000000000
#define MOD 1000000007
#define N 505
#define MAX 5000000
#define LOG 100
#define KOK 333
using namespace std;

int n,k,x;
int ar[2*N],a[N][N],dp[2*N][2*N];

void f_1() {

}

void f_0() {

	int ans=-1,tut;

	/*for(int i=1;i<=2*n;i++,puts("")) {

		for(int j=1;j<=2*n;j++) {

			printf("%d ",dp[i][j]);

		}

	}*/

	for(int i=1;i<=n;i++) {

		if(dp[i][i+n-1]>ans) {

			ans=dp[i][i+n-1];
			tut=i;

		}

	}

	printf("%d\n%d\n",ans,tut);

}

void do_1() {

}

void do_0() {

	for(int len=2;len<=n;len++) {

		for(int i=1;i<=2*n;i++) {

			int beg=i-len+1;
			int en=i+len-1;

			if(beg>=1) {

				for(int j=beg;j<i;j++) {

					if(a[ar[i]][ar[j]]) umax(dp[i][beg],max(dp[j][beg],dp[j][i-1])+1);

				}

			}

			if(en<=2*n) {

				for(int j=i+1;j<=en;j++) {

					if(a[ar[i]][ar[j]]) umax(dp[i][en],max(dp[j][en],dp[j][i+1])+1);

				}

			}
		
		}

	}

}

int main() {
	
	//freopen("input.txt","r",stdin);

	scanf("%d %d",&n,&k);

	for(int i=1;i<=n;i++) {

		do {

			scanf("%d",&x);

			if(x==0) break ;

			a[i][x]=1;

		} while(1);

	}

	for(int i=1;i<=n;i++) ar[i]=ar[i+n]=i;

	do_0();
	do_1();

	if(k==0) f_0();
	else f_1();

}

Compilation message (stderr)

race.cpp: In function 'int main()':
race.cpp:105:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&n,&k);
  ~~~~~^~~~~~~~~~~~~~~
race.cpp:111:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d",&x);
    ~~~~~^~~~~~~~~

• Subtask 1: 40 / 100