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sjtu-oj1041.cpp
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sjtu-oj1041.cpp
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#include <iostream>
#include <stdio.h>
#include <string>
using namespace std;
int tmp;
int *height;
int *posi;
int *numo;
bool flag = false;
void set_heap(int i, int size)
{
if (2 * i > size) return;
if (2 * i + 1 > size)
{
if (height[i * 2] < height[i])
{
tmp = height[i];
height[i] = height[i * 2];
height[i * 2] = tmp;
posi[numo[i]] = 2 * i;
posi[numo[2 * i]] = i;
tmp = numo[i];
numo[i] = numo[2 * i];
numo[2 * i] = tmp;
}
}
else
{
if (height[i * 2] < height[i] && height[i * 2 + 1] < height[i])
{
if (height[i * 2] <= height[i * 2 + 1])
{
tmp = height[i];
height[i] = height[i * 2];
height[i * 2] = tmp;
posi[numo[i]] = 2 * i;
posi[numo[2 * i]] = i;
tmp = numo[i];
numo[i] = numo[2 * i];
numo[2 * i] = tmp;
set_heap(2 * i, size);
}
else
{
tmp = height[i];
height[i] = height[i * 2 + 1];
height[i * 2 + 1] = tmp;
posi[numo[i]] = 2 * i + 1;
posi[numo[2 * i + 1]] = i;
tmp = numo[i];
numo[i] = numo[2 * i + 1];
numo[2 * i + 1] = tmp;
set_heap(2 * i + 1, size);
}
}
else if (height[i * 2] < height[i])
{
tmp = height[i];
height[i] = height[i * 2];
height[i * 2] = tmp;
posi[numo[i]] = 2 * i;
posi[numo[2 * i]] = i;
tmp = numo[i];
numo[i] = numo[2 * i];
numo[2 * i] = tmp;
set_heap(2 * i, size);
}
else if (height[i * 2 + 1] < height[i])
{
tmp = height[i];
height[i] = height[i * 2 + 1];
height[i * 2 + 1] = tmp;
posi[numo[i]] = 2 * i + 1;
posi[numo[2 * i + 1]] = i;
tmp = numo[i];
numo[i] = numo[2 * i + 1];
numo[2 * i + 1] = tmp;
set_heap(2 * i + 1, size);
}
}
}
void fixing(int i)
{
if (i == 1) return;
int mid = i / 2;
if (height[i] < height[mid])
{
tmp = height[i];
height[i] = height[mid];
height[mid] = tmp;
posi[numo[i]] = mid;
posi[numo[mid]] = i;
tmp = numo[i];
numo[i] = numo[mid];
numo[mid] = tmp;
fixing(mid);
}
}
void find_min(int x, int n, int res, int respos)
{
int ndot = n;
while (n)
{
tmp = height[n];
height[n] = height[1];
height[1] = tmp;
posi[numo[1]] = n;
posi[numo[n]] = 1;
tmp = numo[1];
numo[1] = numo[n];
numo[n] = tmp;
set_heap(1, n - 1);
if (height[n] > x && !flag)
{
res = height[n];
respos = numo[n];
flag = true;
}
else if (flag && height[n] == res)
{
if (numo[n] < respos)
respos = numo[n];
}
else if (flag && height[n] > res)
{
while (n <= ndot)
{
fixing(n);
n++;
}
printf("%d\n", respos);
flag = false;
break;
}
if (n == 1)
{
while (n <= ndot)
{
fixing(n);
n++;
}
printf("%d\n", respos);
flag = false;
break;
}
n--;
}
}
int main()
{
int n;
cin >> n;
height = new int[n + 1];
posi = new int[n + 1];
numo = new int[n + 1];
for (int i = 1; i <= n; i++)
{
scanf("%d", &height[i]);
posi[i] = i;
numo[i] = i;
}
for (int i = n / 2; i > 0; i--)
{
set_heap(i, n);
}
string com;
int a, b, x;
while (cin >> com)
{
if (com == "findmin")
{
cin >> x;
find_min(x, n, 0, -1);
}
if (com == "decrease")
{
cin >> a >> b;
height[posi[a]] -= b;
fixing(posi[a]);
}
}
return 0;
}