#include <iostream>
#include <stack>
using namespace std;
const int MAX_TRAJET = 2e5+42, MAX_POW = 19, MAX_FEUILLE = 262144, INF = 1e9;
int nbPos, distMax;
int nbTrajet;
int arbre[MAX_FEUILLE*2][2][MAX_POW];
int get(int deb, int fin, int id, int type) {
deb += MAX_FEUILLE; fin += MAX_FEUILLE;
int rep = INF;
if(type == 1) rep = 0;
while(deb <= fin) {
if(deb % 2 == 1) {
if(type == 0) rep = min(rep, arbre[deb++][0][id]);
else rep = max(rep, arbre[deb++][1][id]);
}
if(fin % 2 == 0) {
if(type == 0) rep = min(rep, arbre[fin--][0][id]);
else rep = max(rep, arbre[fin--][1][id]);
}
deb /= 2;
fin /= 2;
}
return rep;
}
void update(int pos, int val, int type, int id) {
pos += MAX_FEUILLE;
arbre[pos][type][id] = val;
for(pos /= 2; pos > 0; pos /= 2) {
int gauche = arbre[pos*2][type][id];
int droite = arbre[pos*2+1][type][id];
if(type == 0)
arbre[pos][type][id] = min(gauche, droite);
else
arbre[pos][type][id] = max(gauche, droite);
}
}
pair<int, int> posMax[MAX_TRAJET][MAX_POW];
void toutUpdate(int exp) {
for(int pos = 0; pos < nbPos; pos++) {
update(pos, posMax[pos][exp].first, 0, exp);
update(pos, posMax[pos][exp].second, 1, exp);
}
}
pair<int, int> calcInter(int exp, int deb, int fin) {
int nouvDeb = get(deb, fin, exp, 0);
int nouvFin = get(deb, fin, exp, 1);
if(exp == 0) {
nouvDeb = get(deb, min(nbPos-1, fin + distMax - 1), exp, 0);
nouvFin = get(max(0, deb - distMax + 1), fin, exp, 1);
}
return {nouvDeb, nouvFin};
}
void input() {
for(int i = 0; i < MAX_FEUILLE*2; i++) {
for(int j = 0; j < MAX_POW; j++) {
arbre[i][0][j] = INF;
arbre[i][1][j] = 0;
}
}
for(int i = 0; i < MAX_TRAJET; i++)
posMax[i][0].first = posMax[i][0].second = i;
cin >> nbPos >> distMax >> nbTrajet;
for(int i = 0; i < nbTrajet; i++) {
int deb, fin;
cin >> deb >> fin;
deb--; fin--;
if(deb <= fin)
posMax[deb][0].second = max(posMax[deb][0].second, fin);
else
posMax[deb][0].first = min(posMax[deb][0].first, fin);
}
toutUpdate(0);
for(int pos = 0; pos < nbPos; pos++) {
posMax[pos][0].first = posMax[pos][0].second = pos;
pair<int, int> ah = calcInter(0, pos, pos);
posMax[pos][0].first = ah.first; posMax[pos][0].second = ah.second;
}
}
void calcBl() {
for(int exp = 1; exp < MAX_POW; exp++) {
for(int pos = 0; pos < nbPos; pos++) {
pair<int, int> ah = calcInter(exp-1, posMax[pos][exp-1].first, posMax[pos][exp-1].second);
posMax[pos][exp].first = ah.first; posMax[pos][exp].second = ah.second;
}
toutUpdate(exp);
}
}
int req(int depart, int arrive) {
int posDeb = depart;
int deb = depart, fin = depart;
int rep = 0;
for(int exp = MAX_POW-1; exp >= 0; exp--) {
pair<int, int> nouv = calcInter(exp, deb, fin);
if(arrive > nouv.second || arrive < nouv.first) {
rep += (1 << exp);
deb = nouv.first; fin = nouv.second;
}
}
if(arrive < posMax[posDeb][MAX_POW-1].first || arrive > posMax[posDeb][MAX_POW-1].second)
return -1;
return rep+1;
}
int nbReq;
int main() {
input();
calcBl();
cin >> nbReq;
for(int i = 0; i < nbReq; i++) {
int a,b;
cin >> a >> b;
cout << req(a-1, b-1) << endl;
}
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
47 ms |
107940 KB |
Output is correct |
2 |
Correct |
47 ms |
107932 KB |
Output is correct |
3 |
Correct |
45 ms |
107996 KB |
Output is correct |
4 |
Correct |
49 ms |
107972 KB |
Output is correct |
5 |
Correct |
47 ms |
107900 KB |
Output is correct |
6 |
Correct |
46 ms |
107928 KB |
Output is correct |
7 |
Correct |
47 ms |
107940 KB |
Output is correct |
8 |
Correct |
46 ms |
107992 KB |
Output is correct |
9 |
Correct |
46 ms |
107908 KB |
Output is correct |
10 |
Correct |
48 ms |
107940 KB |
Output is correct |
11 |
Correct |
48 ms |
107944 KB |
Output is correct |
12 |
Correct |
47 ms |
107980 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
47 ms |
107940 KB |
Output is correct |
2 |
Correct |
47 ms |
107932 KB |
Output is correct |
3 |
Correct |
45 ms |
107996 KB |
Output is correct |
4 |
Correct |
49 ms |
107972 KB |
Output is correct |
5 |
Correct |
47 ms |
107900 KB |
Output is correct |
6 |
Correct |
46 ms |
107928 KB |
Output is correct |
7 |
Correct |
47 ms |
107940 KB |
Output is correct |
8 |
Correct |
46 ms |
107992 KB |
Output is correct |
9 |
Correct |
46 ms |
107908 KB |
Output is correct |
10 |
Correct |
48 ms |
107940 KB |
Output is correct |
11 |
Correct |
48 ms |
107944 KB |
Output is correct |
12 |
Correct |
47 ms |
107980 KB |
Output is correct |
13 |
Correct |
64 ms |
108016 KB |
Output is correct |
14 |
Correct |
58 ms |
107940 KB |
Output is correct |
15 |
Correct |
53 ms |
107904 KB |
Output is correct |
16 |
Correct |
59 ms |
107980 KB |
Output is correct |
17 |
Correct |
59 ms |
107932 KB |
Output is correct |
18 |
Correct |
58 ms |
107932 KB |
Output is correct |
19 |
Correct |
59 ms |
108000 KB |
Output is correct |
20 |
Correct |
55 ms |
107980 KB |
Output is correct |
21 |
Correct |
54 ms |
107968 KB |
Output is correct |
22 |
Correct |
61 ms |
107972 KB |
Output is correct |
23 |
Correct |
57 ms |
108008 KB |
Output is correct |
24 |
Correct |
58 ms |
107904 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
586 ms |
108008 KB |
Output is correct |
2 |
Correct |
570 ms |
108016 KB |
Output is correct |
3 |
Correct |
616 ms |
108012 KB |
Output is correct |
4 |
Correct |
560 ms |
108012 KB |
Output is correct |
5 |
Correct |
538 ms |
108048 KB |
Output is correct |
6 |
Correct |
556 ms |
107980 KB |
Output is correct |
7 |
Correct |
526 ms |
108016 KB |
Output is correct |
8 |
Correct |
481 ms |
108008 KB |
Output is correct |
9 |
Correct |
481 ms |
108012 KB |
Output is correct |
10 |
Correct |
566 ms |
108012 KB |
Output is correct |
11 |
Correct |
577 ms |
107928 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
703 ms |
108140 KB |
Output is correct |
2 |
Correct |
738 ms |
108136 KB |
Output is correct |
3 |
Correct |
794 ms |
108372 KB |
Output is correct |
4 |
Correct |
629 ms |
108004 KB |
Output is correct |
5 |
Correct |
653 ms |
108052 KB |
Output is correct |
6 |
Correct |
618 ms |
108076 KB |
Output is correct |
7 |
Correct |
724 ms |
108136 KB |
Output is correct |
8 |
Correct |
752 ms |
108168 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
875 ms |
108044 KB |
Output is correct |
2 |
Correct |
772 ms |
108260 KB |
Output is correct |
3 |
Correct |
767 ms |
108264 KB |
Output is correct |
4 |
Correct |
784 ms |
108388 KB |
Output is correct |
5 |
Correct |
641 ms |
108392 KB |
Output is correct |
6 |
Correct |
748 ms |
108620 KB |
Output is correct |
7 |
Correct |
752 ms |
109840 KB |
Output is correct |
8 |
Correct |
51 ms |
108012 KB |
Output is correct |
9 |
Correct |
59 ms |
107984 KB |
Output is correct |
10 |
Correct |
687 ms |
110232 KB |
Output is correct |
11 |
Correct |
776 ms |
110816 KB |
Output is correct |
12 |
Correct |
804 ms |
110940 KB |
Output is correct |
13 |
Correct |
789 ms |
110864 KB |
Output is correct |
14 |
Correct |
49 ms |
107896 KB |
Output is correct |
15 |
Correct |
60 ms |
108044 KB |
Output is correct |
16 |
Correct |
624 ms |
110248 KB |
Output is correct |
17 |
Correct |
933 ms |
111088 KB |
Output is correct |
18 |
Correct |
898 ms |
111068 KB |
Output is correct |
19 |
Correct |
899 ms |
111092 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
47 ms |
107940 KB |
Output is correct |
2 |
Correct |
47 ms |
107932 KB |
Output is correct |
3 |
Correct |
45 ms |
107996 KB |
Output is correct |
4 |
Correct |
49 ms |
107972 KB |
Output is correct |
5 |
Correct |
47 ms |
107900 KB |
Output is correct |
6 |
Correct |
46 ms |
107928 KB |
Output is correct |
7 |
Correct |
47 ms |
107940 KB |
Output is correct |
8 |
Correct |
46 ms |
107992 KB |
Output is correct |
9 |
Correct |
46 ms |
107908 KB |
Output is correct |
10 |
Correct |
48 ms |
107940 KB |
Output is correct |
11 |
Correct |
48 ms |
107944 KB |
Output is correct |
12 |
Correct |
47 ms |
107980 KB |
Output is correct |
13 |
Correct |
64 ms |
108016 KB |
Output is correct |
14 |
Correct |
58 ms |
107940 KB |
Output is correct |
15 |
Correct |
53 ms |
107904 KB |
Output is correct |
16 |
Correct |
59 ms |
107980 KB |
Output is correct |
17 |
Correct |
59 ms |
107932 KB |
Output is correct |
18 |
Correct |
58 ms |
107932 KB |
Output is correct |
19 |
Correct |
59 ms |
108000 KB |
Output is correct |
20 |
Correct |
55 ms |
107980 KB |
Output is correct |
21 |
Correct |
54 ms |
107968 KB |
Output is correct |
22 |
Correct |
61 ms |
107972 KB |
Output is correct |
23 |
Correct |
57 ms |
108008 KB |
Output is correct |
24 |
Correct |
58 ms |
107904 KB |
Output is correct |
25 |
Correct |
586 ms |
108008 KB |
Output is correct |
26 |
Correct |
570 ms |
108016 KB |
Output is correct |
27 |
Correct |
616 ms |
108012 KB |
Output is correct |
28 |
Correct |
560 ms |
108012 KB |
Output is correct |
29 |
Correct |
538 ms |
108048 KB |
Output is correct |
30 |
Correct |
556 ms |
107980 KB |
Output is correct |
31 |
Correct |
526 ms |
108016 KB |
Output is correct |
32 |
Correct |
481 ms |
108008 KB |
Output is correct |
33 |
Correct |
481 ms |
108012 KB |
Output is correct |
34 |
Correct |
566 ms |
108012 KB |
Output is correct |
35 |
Correct |
577 ms |
107928 KB |
Output is correct |
36 |
Correct |
703 ms |
108140 KB |
Output is correct |
37 |
Correct |
738 ms |
108136 KB |
Output is correct |
38 |
Correct |
794 ms |
108372 KB |
Output is correct |
39 |
Correct |
629 ms |
108004 KB |
Output is correct |
40 |
Correct |
653 ms |
108052 KB |
Output is correct |
41 |
Correct |
618 ms |
108076 KB |
Output is correct |
42 |
Correct |
724 ms |
108136 KB |
Output is correct |
43 |
Correct |
752 ms |
108168 KB |
Output is correct |
44 |
Correct |
875 ms |
108044 KB |
Output is correct |
45 |
Correct |
772 ms |
108260 KB |
Output is correct |
46 |
Correct |
767 ms |
108264 KB |
Output is correct |
47 |
Correct |
784 ms |
108388 KB |
Output is correct |
48 |
Correct |
641 ms |
108392 KB |
Output is correct |
49 |
Correct |
748 ms |
108620 KB |
Output is correct |
50 |
Correct |
752 ms |
109840 KB |
Output is correct |
51 |
Correct |
51 ms |
108012 KB |
Output is correct |
52 |
Correct |
59 ms |
107984 KB |
Output is correct |
53 |
Correct |
687 ms |
110232 KB |
Output is correct |
54 |
Correct |
776 ms |
110816 KB |
Output is correct |
55 |
Correct |
804 ms |
110940 KB |
Output is correct |
56 |
Correct |
789 ms |
110864 KB |
Output is correct |
57 |
Correct |
49 ms |
107896 KB |
Output is correct |
58 |
Correct |
60 ms |
108044 KB |
Output is correct |
59 |
Correct |
624 ms |
110248 KB |
Output is correct |
60 |
Correct |
933 ms |
111088 KB |
Output is correct |
61 |
Correct |
898 ms |
111068 KB |
Output is correct |
62 |
Correct |
899 ms |
111092 KB |
Output is correct |
63 |
Correct |
803 ms |
109788 KB |
Output is correct |
64 |
Correct |
894 ms |
109900 KB |
Output is correct |
65 |
Correct |
786 ms |
109652 KB |
Output is correct |
66 |
Correct |
687 ms |
111044 KB |
Output is correct |
67 |
Correct |
810 ms |
111036 KB |
Output is correct |
68 |
Correct |
639 ms |
110872 KB |
Output is correct |
69 |
Correct |
654 ms |
110924 KB |
Output is correct |
70 |
Correct |
758 ms |
111016 KB |
Output is correct |
71 |
Correct |
832 ms |
111112 KB |
Output is correct |