| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 78572 | hamzqq9 | Sailing Race (CEOI12_race) | C++14 | 3049 ms | 9440 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#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 1000000000
#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],dp2[2*N][2*N];
void f_1() {
int ans=-1,tut;
for(int i=1;i<=n;i++) {
if(dp[i][i+n-1]>ans) {
ans=dp[i][i+n-1];
tut=i;
}
}
for(int i=1;i<=n;i++) {
for(int j=1;j<=n;j++) {
if(a[i][j]) {
int be=i;
int en=(i<j?j:j+n-1);
int last=i+n-1;
for(int k=be+1;k<=en-1;k++) {
if(dp2[k][en]>0) {
for(int l=en+1;l<=last;l++) {
if(a[ar[k]][ar[l]]) {
int cur=2+dp2[k][j]+max(dp[l][last],dp[l][en+1]);
if(cur>ans) {
ans=cur;
tut=i;
}
}
}
}
}
}
}
}
printf("%d\n%d\n",ans,tut);
}
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() {
for(int i=1;i<=2*n;i++) for(int j=1;j<=2*n;j++) dp2[i][j]=-inf;
for(int i=1;i<=2*n;i++) dp2[i][i]=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[j]][ar[i]]) umax(dp2[i][beg],dp2[j][beg]+1);
}
}
if(en<=2*n) {
for(int j=i+1;j<=en;j++) {
if(a[ar[j]][ar[i]]) umax(dp2[i][en],dp2[j][en]+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)
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|---|---|---|---|---|
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