| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 891374 |
2023-12-22T20:18:33 Z |
stefanneagu |
RMQ (NOI17_rmq) |
C++17 |
|
19 ms |
580 KB |
#include <bits/stdc++.h>
#pragma GCC optimise ("unroll-loops)
using namespace std;
const int nmax = 1000 + 1;
struct str {
int a, b, val;
const bool operator < (str ult) const {
return val < ult.val;
}
} v[nmax];
int aint[4 * nmax], lz[4 * nmax], rmq[nmax][20], used[nmax], viz[nmax], laba[nmax];
int rmquery(int a, int b) {
int lg = (int) log2(b - a + 1);
return min(rmq[a][lg], rmq[b - (1 << lg) + 1][lg]);
}
void lazy(int nod, int st, int dr) {
aint[nod] = lz[nod];
if(st != dr) {
lz[nod << 1] = lz[nod];
lz[nod << 1|1] = lz[nod];
}
lz[nod] = 0;
}
void update(int nod, int st, int dr, int l, int r, int val) {
if(lz[nod]) {
lazy(nod, st, dr);
}
if(st > r || dr < l) {
return;
}
if(l <= st && dr <= r) {
lz[nod] = val;
lazy(nod, st, dr);
return;
}
int mid = (st + dr) / 2;
update(nod << 1, st, mid, l, r, val);
update(nod << 1|1, mid + 1, dr, l, r, val);
}
int query(int nod, int st, int dr, int poz) {
if(lz[nod]) {
lazy(nod, st, dr);
}
if(st == dr) {
return aint[nod];
}
int mid = (st + dr) / 2;
if(poz <= mid) {
return query(nod << 1, st, mid, poz);
} else {
return query(nod << 1|1, mid + 1, dr, poz);
}
}
void laba_change(int nod, int st, int dr, int poz, int val) {
if(st == dr) {
laba[nod] = val;
return;
}
int mid = (st + dr) / 2;
if(poz <= mid) {
laba_change(nod << 1, st, mid, poz, val);
} else {
laba_change(nod << 1|1, mid + 1, dr, poz, val);
}
laba[nod] = min(laba[nod << 1], laba[nod << 1|1]);
}
int laba_query(int nod, int st, int dr, int l, int r) {
if(st > r || dr < l) {
return 0; // nush de ce pula mea s-ar ajunce aici, dar ma rog
}
if(st == l && dr == r) {
return laba[nod];
}
int mid = (st + dr) / 2, ans1 = 1e9, ans2 = 1e9;
if(l <= mid) {
ans1 = laba_query(nod << 1, st, mid, l, min(r, mid));
}
mid ++;
if(r >= mid) {
ans2 = laba_query(nod << 1|1, mid, dr, max(l, mid), r);
//ans2 = laba_query(nod << 1|1, mid + 1, dr, max(mid + 1, l), r);
}
return min(ans1, ans2);
}
bool check(int n, int q, vector<int> &nou) {
for(int i = 1; i <= q; i ++) {
if(laba_query(1, 1, n, v[i].a, v[i].b) != v[i].val) {
return 0;
}
}
return 1;
}
void bulan_pe_subtask(int n, int q, vector<int> &nou) {
for(int i = 1; i <= n; i ++) {
used[nou[i]] ++;
}
vector<int> un;
for(int i = 0; i < n; i ++) {
if(!used[i]) {
un.push_back(i);
}
}
assert(n < 900);
for(auto nr : un) {
bool ok = 0;
for(int i = 1; i <= n; i ++) {
if(!viz[i]) {
int ult = nou[i];
nou[i] = nr;
laba_change(1, 1, n, i, nr);
if(check(n, q, nou)) {
viz[i] = 1;
ok = 1;
break;
} else {
laba_change(1, 1, n, i, ult);
nou[i] = ult;
}
}
}
if(!ok) {
for(int i = 1; i <= n; i ++) {
cout << "-1 ";
}
return;
}
}
for(int i = 1; i <= n; i ++) {
cout << nou[i] << " ";
}
}
int32_t main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
int n, q;
cin >> n >> q;
for(int i = 1; i <= q; i ++) {
int a, b, val;
cin >> a >> b >> val;
a ++;
b ++;
v[i].a = a, v[i].b = b, v[i].val = val;
}
sort(v + 1, v + q + 1);
for(int i = 1; i <= q; i ++) {
update(1, 1, n, v[i].a, v[i].b, v[i].val);
}
vector<int> nou(n + 1);
for(int i = 1; i <= n; i ++) {
nou[i] = query(1, 1, n, i);
rmq[i][0] = nou[i];
}
for(int j = 1; (1 << j) <= n; j ++) {
for(int i = 1; i + (1 << j) - 1 <= n; i ++) {
rmq[i][j] = min(rmq[i][j - 1], rmq[i + (1 << (j - 1))][j - 1]);
}
}
if(n <= 1000) {
bulan_pe_subtask(n, q, nou);
return 0;
}
for(int i = 1; i <= q; i ++) {
if(rmquery(v[i].a, v[i].b) != v[i].val) {
for(int j = 1; j <= n; j ++) {
cout << "-1 ";
}
return 0;
}
}
for(int i = 1; i <= n; i ++) {
cout << nou[i] << " ";
}
return 0;
}
Compilation message
rmq.cpp:2: warning: ignoring '#pragma GCC optimise' [-Wunknown-pragmas]
2 | #pragma GCC optimise ("unroll-loops)
|
rmq.cpp:2:23: warning: missing terminating " character
2 | #pragma GCC optimise ("unroll-loops)
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Incorrect |
19 ms |
580 KB |
Output isn't correct |
| 13 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Incorrect |
19 ms |
580 KB |
Output isn't correct |
| 13 |
Halted |
0 ms |
0 KB |
- |
