| # |
제출 시각 |
아이디 |
문제 |
언어 |
결과 |
실행 시간 |
메모리 |
| 168385 |
2019-12-12T21:24:31 Z |
tri |
휴가 (IOI14_holiday) |
C++11 |
|
1199 ms |
22260 KB |
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;
typedef vector<int> vi;
typedef vector<ld> vd;
typedef vector<ll> vl;
#define pb push_back
#define f first
#define s second
namespace debug {
const int DEBUG = true;
template<class T1, class T2>
void pr(const pair<T1, T2> &x);
template<class T, size_t SZ>
void pr(const array<T, SZ> &x);
template<class T>
void pr(const vector<T> &x);
template<class T>
void pr(const set<T> &x);
template<class T1, class T2>
void pr(const map<T1, T2> &x);
template<class T>
void pr(const T &x) { if (DEBUG) cout << x; }
template<class T, class... Ts>
void pr(const T &first, const Ts &... rest) { pr(first), pr(rest...); }
template<class T1, class T2>
void pr(const pair<T1, T2> &x) { pr("{", x.f, ", ", x.s, "}"); }
template<class T>
void prIn(const T &x) {
pr("{");
bool fst = 1;
for (auto &a : x) {
pr(fst ? "" : ", ", a), fst = 0;
}
pr("}");
}
template<class T, size_t SZ>
void pr(const array<T, SZ> &x) { prIn(x); }
template<class T>
void pr(const vector<T> &x) { prIn(x); }
template<class T>
void pr(const set<T> &x) { prIn(x); }
template<class T1, class T2>
void pr(const map<T1, T2> &x) { prIn(x); }
void ps() { pr("\n"), cout << flush; }
template<class Arg, class... Args>
void ps(const Arg &first, const Args &... rest) {
pr(first, " ");
ps(rest...);
}
}
using namespace debug;
const int MAXN = 200000;
vl initA;
struct SegTr {
ll sumA[4 * MAXN], act[4 * MAXN];
void b(int i, int l, int r) {
act[i] = 0;
sumA[i] = 0;
if (l == r) {
return;
}
int mid = (l + r) / 2;
b(i * 2, l, mid);
b(i * 2 + 1, mid + 1, r);
}
void toggle(int i, int l, int r, int x) {
if (l == r) {
act[i] ^= 1;
sumA[i] = act[i] ? initA[l] : 0;
return;
}
int mid = (l + r) / 2;
if (x <= mid) {
toggle(i * 2, l, mid, x);
} else {
toggle(i * 2 + 1, mid + 1, r, x);
}
act[i] = act[i * 2] + act[i * 2 + 1];
sumA[i] = sumA[i * 2] + sumA[i * 2 + 1];
}
ll sumK(int i, int l, int r, int k) {
if (l == r) {
if (act[i] && k > 0) {
return sumA[i];
} else {
return 0;
}
}
int mid = (l + r) / 2;
if (act[i * 2] >= k) {
return sumK(i * 2, l, mid, k);
} else {
return sumA[i * 2] + sumK(i * 2 + 1, mid + 1, r, k - act[i * 2]);
}
}
void dumpTree(int i, int l, int r) {
ps("dump", i, l, r, ":", act[i], sumA[i]);
if (l != r) {
int mid = (l + r) / 2;
dumpTree(i * 2, l, mid);
dumpTree(i * 2 + 1, mid + 1, r);
}
}
} segTr;
int N;
int st;
int tCost;
// used for computeSide
int M;
int movC;
vi segI;
int lastA = -1;
vl ans;
ll toggleCnt = 0;
vector<pair<pi, pi>> cLevel, nLevel;
void computeRange(pair<pi, pi> range) {
int lCost = range.f.f, hCost = range.f.s, lEnd = range.s.f, rEnd = range.s.s;
int midCost = (lCost + hCost) / 2;
while (lastA >= lEnd) {
segTr.toggle(1, 1, M, segI[lastA]);
toggleCnt++;
// ps("toggle", segI[lastA]);
lastA--;
}
while (lastA < lEnd - 1) {
lastA++;
segTr.toggle(1, 1, M, segI[lastA]);
toggleCnt++;
// ps("toggle", segI[lastA]);
}
// above loops should be amortized O(N log^2 N)
ll bVal = -1, bEnd = -1;
for (int cEnd = lEnd; cEnd <= rEnd; cEnd++) {
lastA = cEnd;
segTr.toggle(1, 1, M, segI[lastA]);
toggleCnt++;
// ps("toggle", segI[lastA]);
if (midCost - cEnd * movC < 0) break;
// segTr.dumpTree(1, 1, M);
ll cVal = segTr.sumK(1, 1, M, midCost - cEnd * movC);
// ps("cVal", cVal);
// ps("k:", midCost - cEnd * movC);
// ps(cVal);
if (bVal < cVal) {
bVal = cVal;
bEnd = cEnd;
}
}
// ps(midCost, lEnd, rEnd, movC);
assert(bVal >= 0);
// ps(midCost);
ans[midCost] = bVal;
// ps("midCost, bVal:", midCost, bVal);
// ps(bEnd);
if (lCost < midCost) {
nLevel.pb({{lCost, midCost - 1},
{lEnd, bEnd}});
}
if (midCost < hCost) {
nLevel.pb({{midCost + 1, hCost},
{bEnd, rEnd}});
}
}
void computeRanges() {
nLevel.pb({{0, tCost},
{0, M - 1}});
while (!nLevel.empty()) {
cLevel.clear();
cLevel.insert(cLevel.begin(), nLevel.begin(), nLevel.end());
nLevel.clear();
for (auto x: cLevel) {
computeRange(x);
}
}
}
vl computeSide(vi &val) {
M = val.size();
vector<pi> vali;
for (int i = 0; i < M; i++) {
vali.pb({val[i], i});
}
sort(vali.begin(), vali.end());
reverse(vali.begin(), vali.end()); // largest val first
initA.clear();
initA.pb(0);
segI.resize(M);
for (int i = 0; i < M; i++) {
initA.pb(vali[i].f);
segI[vali[i].s] = i + 1;
}
// ps("segI", segI);
// ps(initA);
segTr.b(1, 1, M);
lastA = -1;
ans.resize(tCost + 1);
fill(ans.begin(), ans.end(), 0);
computeRanges();
return ans;
}
long long int findMaxAttraction(int iN, int ist, int iD,
int iA[]) {
N = iN, st = ist, tCost = iD;
vi a;
for (int i = 0; i < N; i++) {
a.pb(iA[i]);
}
vi lSide;
for (int i = st; i >= 0; i--) {
lSide.pb(a[i]);
}
vi rSide;
for (int i = st; i < N; i++) {
rSide.pb(a[i]);
}
rSide[0] = 0; // don't take it twice
movC = 1;
vl left1 = computeSide(lSide);
vl right1 = computeSide(rSide);
movC = 2;
vl left2 = computeSide(lSide);
vl right2 = computeSide(rSide);
ll best = 0;
for (int i = 0; i <= tCost; i++) {
best = max(best, left1[i] + right2[tCost - i]);
best = max(best, left2[i] + right1[tCost - i]);
}
// ps(left1);
// ps(left2);
// ps(right1);
// ps(right2);
// ps(toggleCnt);
return best;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
376 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Correct |
2 ms |
376 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1113 ms |
18728 KB |
Output is correct |
| 2 |
Correct |
1100 ms |
18712 KB |
Output is correct |
| 3 |
Correct |
1111 ms |
18820 KB |
Output is correct |
| 4 |
Correct |
1085 ms |
18668 KB |
Output is correct |
| 5 |
Correct |
1130 ms |
14596 KB |
Output is correct |
| 6 |
Correct |
447 ms |
11876 KB |
Output is correct |
| 7 |
Correct |
657 ms |
9212 KB |
Output is correct |
| 8 |
Correct |
717 ms |
9396 KB |
Output is correct |
| 9 |
Correct |
360 ms |
15196 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
28 ms |
960 KB |
Output is correct |
| 2 |
Correct |
21 ms |
1016 KB |
Output is correct |
| 3 |
Correct |
22 ms |
1016 KB |
Output is correct |
| 4 |
Correct |
21 ms |
760 KB |
Output is correct |
| 5 |
Correct |
19 ms |
636 KB |
Output is correct |
| 6 |
Correct |
6 ms |
504 KB |
Output is correct |
| 7 |
Correct |
5 ms |
376 KB |
Output is correct |
| 8 |
Correct |
5 ms |
376 KB |
Output is correct |
| 9 |
Correct |
5 ms |
504 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1193 ms |
20436 KB |
Output is correct |
| 2 |
Correct |
1199 ms |
22260 KB |
Output is correct |
| 3 |
Correct |
172 ms |
3136 KB |
Output is correct |
| 4 |
Correct |
12 ms |
504 KB |
Output is correct |
| 5 |
Correct |
5 ms |
376 KB |
Output is correct |
| 6 |
Correct |
5 ms |
376 KB |
Output is correct |
| 7 |
Correct |
5 ms |
376 KB |
Output is correct |
| 8 |
Correct |
979 ms |
7844 KB |
Output is correct |
| 9 |
Correct |
986 ms |
8036 KB |
Output is correct |
