# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
1105270 |
2024-10-26T01:55:55 Z |
Faggi |
Sails (IOI07_sails) |
C++11 |
|
244 ms |
9504 KB |
#include <bits/stdc++.h>
#define ll long long
using namespace std;
vector<ll> tamDP; // Cantidad máxima de velas por altura
vector<ll> calcs; // Ineficiencia acumulada por cantidad de velas
ll tam;
// Verifica si es posible distribuir las velas con un límite x
bool can(vector<ll> dp, ll x) {
ll sobrante = 0;
priority_queue<pair<ll, ll>> sum, res; // Para manejar sobrantes y espacios
for (ll i = tam; i > 0; i--) {
ll maximo = min(x, tamDP[i]);
// Si hay más velas de las permitidas, genera un sobrante
if (dp[i] > maximo) {
sobrante = dp[i] - maximo;
dp[i] = maximo;
if (i > 1)
sum.push({i, sobrante});
else
return false;
}
// Si sobra espacio, lo almacenamos
else {
res.push({i, maximo - dp[i]});
}
}
sobrante = 0;
// Emparejamos sobrantes con espacios disponibles
while (!sum.empty() && !res.empty()) {
ll pos = sum.top().first;
sobrante += sum.top().second;
sum.pop();
// Elimina espacios que ya no se pueden usar
while (!res.empty() && res.top().first > pos)
res.pop();
// Ajusta los sobrantes
while (!res.empty() && sobrante > 0) {
ll posR = res.top().first;
ll espacio = res.top().second;
res.pop();
if (sobrante <= espacio) {
res.push({posR, espacio - sobrante});
sobrante = 0;
} else {
sobrante -= espacio;
}
}
if (sobrante > 0) return false;
}
return sum.empty() && sobrante == 0;
}
// Calcula la ineficiencia mínima con un límite x
ll calc(vector<ll> dp, ll x) {
priority_queue<pair<ll, ll>> pq;
ll ret = 0;
// Llena la cola con las diferencias entre el límite y las velas actuales
for (ll i = tam; i > 0; i--) {
if (dp[i] < min(x, tamDP[i])) {
pq.push({i, min(x, tamDP[i]) - dp[i]});
}
}
// Redistribuye las velas para minimizar la ineficiencia
for (ll i = tam; i > 0; i--) {
while (!pq.empty() && pq.top().first > i)
pq.pop();
while (dp[i] > min(x, tamDP[i])) {
ll rest = min(dp[i] - min(x, tamDP[i]), pq.top().second);
dp[i] -= rest;
dp[pq.top().first] += rest;
if (pq.top().second - rest > 0) {
pq.push({pq.top().first, pq.top().second - rest});
} else {
pq.pop();
}
}
}
// Calcula la ineficiencia total
for (ll i = tam; i > 0; i--) {
ret += calcs[dp[i]];
}
return ret;
}
int main() {
ll n;
cin >> n;
calcs.resize(n + 1);
calcs[0] = 0;
calcs[1] = 0;
// Calcula la ineficiencia acumulada
for (ll i = 2; i <= n; i++) {
calcs[i] = calcs[i - 1] + (i - 1);
}
vector<pair<ll, ll>> v(n);
tam = 0;
// Lee los mástiles y calcula la altura máxima
for (ll i = 0; i < n; i++) {
cin >> v[i].first >> v[i].second;
tam = max(tam, v[i].first);
}
vector<ll> dp(tam + 1, 0);
tamDP.resize(tam + 1, 0);
// Inicializa los valores de DP y tamDP
for (ll i = 0; i < n; i++) {
dp[v[i].first]++;
dp[v[i].first - v[i].second]--;
tamDP[v[i].first]++;
}
ll ma = dp[tam];
// Acumula los valores en dp y tamDP
for (ll i = tam - 1; i >= 0; i--) {
dp[i] += dp[i + 1];
ma = max(ma, dp[i]);
tamDP[i] += tamDP[i + 1];
}
ll mi = 0, pos = ma;
// Búsqueda binaria para encontrar el valor mínimo posible
while (mi <= ma) {
ll piv = (mi + ma) / 2;
if (can(dp, piv)) {
ma = piv - 1;
pos = piv;
} else {
mi = piv + 1;
}
}
// Calcula y muestra la ineficiencia mínima
cout << calc(dp, pos) << endl;
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
336 KB |
Output is correct |
2 |
Correct |
1 ms |
336 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
336 KB |
Output is correct |
2 |
Correct |
1 ms |
336 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
336 KB |
Output is correct |
2 |
Correct |
1 ms |
336 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
1 ms |
336 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
6 ms |
592 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
45 ms |
2368 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
50 ms |
3164 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
91 ms |
4784 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
244 ms |
9224 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
191 ms |
9504 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
209 ms |
8256 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |