JLOI2013过了好长时间,才写第四题。。
第一问比较好想。
第二问我想到了n^3次方的做法,但是数据。。。。于是没敢写,然后上网查了一下题解,居然是O(n^3)过的,数据这么弱。。。
/*
* Problem: JLOI2013-Terrain
* Author: Shun Yao
*/ #include <string.h>
#include <stdlib.h>
#include <limits.h>
#include <assert.h>
#include <stdio.h>
#include <ctype.h>
#include <math.h>
#include <time.h> #include <map>
#include <set>
#include <list>
#include <stack>
#include <queue>
#include <deque>
#include <string>
#include <vector>
#include <bitset>
#include <utility>
#include <iomanip>
#include <numeric>
#include <sstream>
#include <iostream>
#include <algorithm>
#include <functional> //using namespace std; const int MAXN = 1010;
const int MOD = 2011; int n;
std::map<int, int> ocr; struct Data {
int h, k;
} a[MAXN]; bool cmp(Data a, Data b) {
return a.h != b.h ? a.h > b.h : a.k < b.k;
} int main(/*int argc, char **argv*/) {
int i, j, t, f[2][MAXN], ans1, ans2, cur, k; freopen("terrain.in", "r", stdin);
freopen("terrain.out", "w", stdout); scanf("%d", &n);
for (i = 1; i <= n; ++i) {
scanf("%d%d", &a[i].h, &a[i].k);
++ocr[a[i].h];
}
std::sort(a + 1, a + n + 1, cmp);
ans1 = ans2 = 1;
for (i = 1; i <= n; ) {
t = 0;
for (j = 0; j < ocr[a[i].h]; ++j)
ans1 = ans1 * (std::min(i, a[i + j].k) + t++) % MOD;
memset(f[0], 0, sizeof f[0]);
f[0][1] = 1;
cur = 0;
for (j = 0; j < ocr[a[i].h]; ++j) {
memset(f[1 - cur], 0, sizeof f[1 - cur]);
for (k = 1; k <= std::min(i, a[i + j].k); ++k)
f[1 - cur][k] = (f[1 - cur][k - 1] + f[cur][k]) % MOD;
cur = 1 - cur;
}
t = 0;
for (j = 1; j <= i; ++j)
t = (t + f[cur][j]) % MOD;
ans2 = ans2 * t % MOD;
i += ocr[a[i].h];
}
printf("%d %d", ans1, ans2); fclose(stdin);
fclose(stdout);
return 0;
}