LYDSY 2120
题目大意
暂无
题目解法
暂无
RTFC
#include <cstdio>
int a[10010], f[20010], map[1001001], idx;
int main()
{
int n, m;
scanf("%d%d", &n, &m);
for (int i = 1, x; i <= n; i++)
{
scanf("%d", &x);
if (!map[x])
map[x] = ++idx;
a[i] = map[x];
}
for (int i = 1, x, y; i <= m; i++)
{
char ch;
scanf("%s%d%d", &ch, &x, &y);
if (ch == 'R')
{
if (!map[y])
map[y] = ++idx;
a[x] = map[y];
}
else
{
int ans = 0;
for (int j = x; j <= y; j++)
if (f[a[j]] != i)
ans++, f[a[j]] = i;
printf("%d\n", ans);
}
}
return 0;
}