# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
463608 | kilikuma | Exam (eJOI20_exam) | C++14 | 253 ms | 2636 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>
using namespace std;
struct Segment {
int deb, fin;
};
bool comp(Segment a, Segment b) {
if (a.deb < b.deb) return (a.deb < b.deb);
else return (a.fin > b.fin);
}
int main() {
int N;
scanf("%d",&N);
int A[100000], B[100000];
int nbSegments =0;
Segment seg[100000];
int dp[100000];
for (int i=0;i<100000;i++) {
dp[i] = 100000;
}
dp[0] = 0;
for (int i=1;i<=N;i++) {
scanf("%d",&A[i]);
}
for (int i=1;i<=N;i++) {
scanf("%d",&B[i]);
}
for (int i=1;i<=N;i++) {
for (int j=i; j<= N; j++) {
if (A[j] == B[i]) {
seg[nbSegments].deb = i;
seg[nbSegments].fin = j;
nbSegments ++;
}
}
}
sort(seg, seg + nbSegments, comp);
for (int iSegment = 0;iSegment < nbSegments; iSegment ++) {
int dp1[100000];
for (int i=0;i<= nbSegments;i++) dp1[i] = 100000;
for (int iCase = 0; iCase <= nbSegments; iCase ++) {
if (dp[iCase] == 100000) {;}
else {
if (seg[iSegment].fin >= dp[iCase]) {
// cout << iCase << endl;
dp1[iCase+1] = min(dp[iCase+1], seg[iSegment].fin);
}
}
}
for (int iCase =0; iCase <=nbSegments;iCase ++) {
if(dp1[iCase] != 100000) dp[iCase] = dp1[iCase];
}
}
int maxi =0;
for (int iCase = 0; iCase <= nbSegments; iCase ++) {
if (dp[iCase] != -1) maxi = max(maxi, iCase);
}
printf("%d\n", maxi);
}
Compilation message (stderr)
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