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Submission #265106

# Submission time Handle Problem Language Result Execution time Memory
265106 2020-08-14T13:11:23 Z TadijaSebez Sailing Race (CEOI12_race) C++11
40 / 100
 347 ms 3152 KB 
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
void ckmx(int&x,int y){x=max(x,y);}
const int N=505;
vector<int> E[N];
int dp[N][N][2],n;
bool was[N][N][2];
int DP(int l,int r,int side){
	if(was[l][r][side])return dp[l][r][side];
	int u=side==0?l:r;
	was[l][r][side]=1;
	int L=side==0?(l==n?1:l+1):l;
	int R=side==1?(r==1?n:r-1):r;
	for(int v:E[u]){
		if((l<=r&&l<=v&&r>=v)||(l>r&&(v<=r||v>=l))){
			ckmx(dp[l][r][side],1+max(DP(L,v,1),DP(v,R,0)));
		}
	}
	return dp[l][r][side];
}
int main(){
	scanf("%i %*i",&n);
	for(int i=1;i<=n;i++){
		while(1){
			int j;
			scanf("%i",&j);
			if(j==0)break;
			E[i].pb(j);
		}
	}
	int ans=-1,idx=0;
	for(int i=1;i<=n;i++){
		int now=DP(i,i==1?n:i-1,0);
		if(now>ans)ans=now,idx=i;
	}
	printf("%i\n%i\n",ans,idx);
	return 0;
}

Compilation message

race.cpp: In function 'int main()':
race.cpp:23:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   23 |  scanf("%i %*i",&n);
      |  ~~~~~^~~~~~~~~~~~~
race.cpp:27:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   27 |    scanf("%i",&j);
      |    ~~~~~^~~~~~~~~

Subtask #1
40.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Incorrect 1 ms 384 KB Output isn't correct
3 Incorrect 1 ms 512 KB Output isn't correct
4 Incorrect 1 ms 512 KB Output isn't correct
5 Correct 1 ms 640 KB Output is correct
6 Incorrect 1 ms 640 KB Output isn't correct
7 Correct 4 ms 768 KB Output is correct
8 Incorrect 2 ms 768 KB Output isn't correct
9 Correct 5 ms 768 KB Output is correct
10 Correct 15 ms 896 KB Output is correct
11 Correct 7 ms 896 KB Output is correct
12 Incorrect 21 ms 1408 KB Output isn't correct
13 Incorrect 39 ms 1916 KB Output isn't correct
14 Correct 63 ms 2424 KB Output is correct
15 Incorrect 250 ms 3064 KB Output isn't correct
16 Incorrect 301 ms 3024 KB Output isn't correct
17 Incorrect 250 ms 3108 KB Output isn't correct
18 Correct 83 ms 2920 KB Output is correct
19 Incorrect 347 ms 3152 KB Output isn't correct
20 Incorrect 347 ms 3064 KB Output isn't correct