oj.uz

답안 #832955

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
832955 2023-08-21T17:06:06 Z happypotato 말 (IOI15_horses) C++17
100 / 100
 281 ms 44772 KB 
#include "horses.h"
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pii pair<int, int>
#define ff first
#define ss second
const int MOD = 1e9 + 7;
int bigmod(int b, int p) {
	b %= MOD;
	int res = 1;
	while (p) {
		if (p & 1) res = (res * b) % MOD;
		p >>= 1; b = (b * b) % MOD;
	}
	return res;
}
int modinv(int x) {
	return bigmod(x, MOD - 2);
}
const int mxN = 5e5 + 1;
int seg[4 * mxN];
pii a[mxN];
int n;
void build(int l = 1, int r = n, int idx = 1) {
	if (l == r) {
		seg[idx] = a[l].ss;
		return;
	}
	int mid = (l + r) >> 1;
	build(l, mid, (idx << 1));
	build(mid + 1, r, (idx << 1) | 1);
	seg[idx] = max(seg[(idx << 1)], seg[(idx << 1) | 1]);
}
void update(int pos, int val, int l = 1, int r = n, int idx = 1) {
	if (l == r) {
		seg[idx] = val;
		return;
	}
	int mid = (l + r) >> 1;
	if (pos <= mid) update(pos, val, l, mid, (idx << 1));
	else update(pos, val, mid + 1, r, (idx << 1) | 1);
	seg[idx] = max(seg[(idx << 1)], seg[(idx << 1) | 1]);
}
int query(int tl, int tr, int l = 1, int r = n, int idx = 1) {
	if (tl <= l && r <= tr) return seg[idx];
	int mid = (l + r) >> 1;
	int res = -1e9;
	if (tl <= mid) res = max(res, query(tl, tr, l, mid, (idx << 1)));
	if (tr > mid) res = max(res, query(tl, tr, mid + 1, r, (idx << 1) | 1));
	return res;
}
set<int> s;
int totmult;

int findans() {
	int multi = 1;
	int res = 0;
	set<int>::iterator it = s.end();
	while (res <= (int)(1.5e9) && it != s.begin()) {
		--it;
		res = max(res, query(*it, n)) * a[*it].ff;
		multi *= a[*it].ff;
	}
	if (it == s.begin()) res = max(res, query(1, n));
	res %= MOD;
	res = (res * modinv(multi)) % MOD;
	res = (res * totmult) % MOD;
	return res;
}

int32_t init(int32_t N, int32_t X[], int32_t Y[]) {
	n = N;
	totmult = 1;
	s.clear();
	for (int i = 1; i <= n; i++) {
		a[i] = {X[i - 1], Y[i - 1]};
		if (a[i].ff >= 2) {
			s.insert(i);
			totmult = (totmult * a[i].ff) % MOD;
		}
	}
	build();
	return findans();
}

int32_t updateX(int32_t pos, int32_t val) {	
	pos++;
	if (a[pos].ff >= 2) {
		s.erase(s.find(pos));
		totmult = (totmult * modinv(a[pos].ff)) % MOD;
	}
	a[pos].ff = val;
	if (a[pos].ff >= 2) {
		s.insert(pos);
		totmult = (totmult * a[pos].ff) % MOD;
	}
	return findans();
}

int32_t updateY(int32_t pos, int32_t val) {
	pos++;
	a[pos].ss = val;
	update(pos, val);
	return findans();
}

#undef int

Compilation message

horses.cpp: In function 'int32_t init(int32_t, int32_t*, int32_t*)':
horses.cpp:84:16: warning: conversion from 'long long int' to 'int32_t' {aka 'int'} may change value [-Wconversion]
   84 |  return findans();
      |         ~~~~~~~^~
horses.cpp: In function 'int32_t updateX(int32_t, int32_t)':
horses.cpp:98:16: warning: conversion from 'long long int' to 'int32_t' {aka 'int'} may change value [-Wconversion]
   98 |  return findans();
      |         ~~~~~~~^~
horses.cpp: In function 'int32_t updateY(int32_t, int32_t)':
horses.cpp:105:16: warning: conversion from 'long long int' to 'int32_t' {aka 'int'} may change value [-Wconversion]
  105 |  return findans();
      |         ~~~~~~~^~

Subtask #1
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct

Subtask #2
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 3 ms 340 KB Output is correct
28 Correct 1 ms 388 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 2 ms 340 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 281 ms 44716 KB Output is correct
2 Correct 253 ms 44692 KB Output is correct
3 Correct 233 ms 44700 KB Output is correct
4 Correct 244 ms 44668 KB Output is correct

Subtask #4
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 264 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 2 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 2 ms 340 KB Output is correct
33 Correct 29 ms 20408 KB Output is correct
34 Correct 29 ms 20404 KB Output is correct
35 Correct 143 ms 43832 KB Output is correct
36 Correct 138 ms 43844 KB Output is correct
37 Correct 42 ms 20420 KB Output is correct
38 Correct 73 ms 32460 KB Output is correct
39 Correct 22 ms 20180 KB Output is correct
40 Correct 127 ms 43736 KB Output is correct
41 Correct 30 ms 20332 KB Output is correct
42 Correct 36 ms 20348 KB Output is correct
43 Correct 122 ms 43728 KB Output is correct
44 Correct 122 ms 43752 KB Output is correct

Subtask #5
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 2 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 2 ms 340 KB Output is correct
33 Correct 280 ms 44648 KB Output is correct
34 Correct 235 ms 44720 KB Output is correct
35 Correct 228 ms 44640 KB Output is correct
36 Correct 242 ms 44620 KB Output is correct
37 Correct 29 ms 20392 KB Output is correct
38 Correct 28 ms 20460 KB Output is correct
39 Correct 146 ms 43820 KB Output is correct
40 Correct 139 ms 43820 KB Output is correct
41 Correct 43 ms 20460 KB Output is correct
42 Correct 71 ms 32228 KB Output is correct
43 Correct 22 ms 20284 KB Output is correct
44 Correct 125 ms 43736 KB Output is correct
45 Correct 30 ms 20328 KB Output is correct
46 Correct 38 ms 20300 KB Output is correct
47 Correct 122 ms 43688 KB Output is correct
48 Correct 121 ms 43724 KB Output is correct
49 Correct 82 ms 22308 KB Output is correct
50 Correct 76 ms 22344 KB Output is correct
51 Correct 213 ms 44772 KB Output is correct
52 Correct 176 ms 44740 KB Output is correct
53 Correct 251 ms 22248 KB Output is correct
54 Correct 130 ms 35212 KB Output is correct
55 Correct 68 ms 20428 KB Output is correct
56 Correct 182 ms 44668 KB Output is correct
57 Correct 144 ms 21176 KB Output is correct
58 Correct 208 ms 21344 KB Output is correct
59 Correct 123 ms 43656 KB Output is correct