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답안 #133588

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
133588 2019-07-21T05:49:23 Z MAMBA 말 (IOI15_horses) C++17
100 / 100
 764 ms 42488 KB 
#include "horses.h"
#include <bits/stdc++.h>

using namespace std;

#define rep(i , j , k) for (int i = j; i < (int)k; i++)
#define pb push_back
#define lid id<<1
#define rid lid|1

typedef long long ll;
typedef pair<ll ,ll> pll;

const int MOD = 1e9 + 7;
const int MAXN = 5e5 + 10;

int N;

ll A[MAXN], B[MAXN], segM[MAXN << 2], segX[MAXN << 2];
bool segH[MAXN << 2];

void build(int l = 0, int r = N, int id = 1) {
	if (l == r - 1) {
		segM[id] = A[l];
		segX[id] = B[l];
		segH[id] = segM[id] > 1;
		return;
	}
	int mid = l +r >> 1;
	build(l , mid , lid);
	build(mid , r ,rid);
	segM[id] = segM[lid] * segM[rid] % MOD;
	segX[id] = max(segX[lid] , segX[rid]);
	segH[id] = segH[lid] | segH[rid];
}

void segUpt(int pos , int l = 0 , int r = N, int id = 1) {
	if (l == r - 1) {
		segM[id] = A[l];
		segX[id] = B[l];
		segH[id] = segM[id] > 1;
		return;
	}
	int mid = l +r >> 1;
	if (pos < mid) segUpt(pos , l , mid , lid);
	else segUpt(pos , mid , r ,rid);
	segM[id] = segM[lid] * segM[rid] % MOD;
	segX[id] = max(segX[lid] , segX[rid]);
	segH[id] = segH[lid] | segH[rid];
}

int segRight(int lim , int l = 0, int r = N, int id = 1) {
	if (l >= lim || !segH[id]) return -1;
	if (l == r - 1) return l;
	int mid = l + r >> 1;
	int res = segRight(lim , mid , r, rid);
	if (!~res) res = segRight(lim , l , mid, lid);
	return res;
}

int segMax(int  lim , int l = 0, int r = N, int id = 1) {
	if (l >= lim) return segX[id];
	int mid = l +r >> 1;
	int res = segMax(lim , mid , r , rid);
	if (lim < mid) res = max(res , segMax(lim , l , mid , lid));
	return res;
}

int segMul(int lim , int l = 0, int r = N, int id = 1) {
	if (l >= lim) return 1;
	if (r <= lim) return segM[id];
	int mid = l + r >> 1;
	return 1ll * segMul(lim , l , mid , lid) * segMul(lim , mid , r, rid) % MOD;
}


int solve() {
	vector<pll> pos;
	ll mul = 1;
	int last = N;
	while (mul < 1e9 && last) {
		int id = segRight(last);
		if (!~id) {
			pos.pb({0 , segMax(0)});
			break;
		}
		mul *= A[id];
		last = id;
		pos.pb({id , segMax(id)});
	}
	ll best = 0;
	bool biger = false;
	for (auto e : pos) {
		ll local = e.second;
		if(biger) 
			local = best;
		else if (best > local) 
			local = best;
		local *= A[e.first];
		if (local >= MOD) {
			biger = true;
			local %= MOD;
		}
		best = local;
	}
	//cout <<  best * segMul(pos.back().first) % MOD << endl;
	return best * segMul(pos.back().first) % MOD;
}

int init(int N2, int X[], int Y[]) {
	N = N2;
	rep(i , 0 , N) {
		A[i] = X[i];
		B[i] = Y[i];
	}

	build();
	return solve();
}

int updateX(int pos, int val) {	
	A[pos] = val;
	segUpt(pos);
	return solve();
}

int updateY(int pos, int val) {
	B[pos] = val;
	segUpt(pos);
	return solve();
}

Compilation message

horses.cpp: In function 'void build(int, int, int)':
horses.cpp:29:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid = l +r >> 1;
            ~~^~
horses.cpp: In function 'void segUpt(int, int, int, int)':
horses.cpp:44:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid = l +r >> 1;
            ~~^~
horses.cpp: In function 'int segRight(int, int, int, int)':
horses.cpp:55:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid = l + r >> 1;
            ~~^~~
horses.cpp: In function 'int segMax(int, int, int, int)':
horses.cpp:62:30: warning: conversion to 'int' from 'll {aka long long int}' may alter its value [-Wconversion]
  if (l >= lim) return segX[id];
                       ~~~~~~~^
horses.cpp:63:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid = l +r >> 1;
            ~~^~
horses.cpp: In function 'int segMul(int, int, int, int)':
horses.cpp:71:30: warning: conversion to 'int' from 'll {aka long long int}' may alter its value [-Wconversion]
  if (r <= lim) return segM[id];
                       ~~~~~~~^
horses.cpp:72:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid = l + r >> 1;
            ~~^~~
horses.cpp:73:72: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  return 1ll * segMul(lim , l , mid , lid) * segMul(lim , mid , r, rid) % MOD;
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
horses.cpp: In function 'int solve()':
horses.cpp:81:15: warning: conversion to 'double' from 'll {aka long long int}' may alter its value [-Wconversion]
  while (mul < 1e9 && last) {
               ^~~
horses.cpp:107:34: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  return best * segMul(pos.back().first) % MOD;
                       ~~~~~~~~~~~^~~~~
horses.cpp:107:41: warning: conversion to 'int' from 'll {aka long long int}' may alter its value [-Wconversion]
  return best * segMul(pos.back().first) % MOD;
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~

Subtask #1
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 380 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 380 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 424 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 380 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct

Subtask #2
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 380 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 3 ms 380 KB Output is correct
24 Correct 3 ms 504 KB Output is correct
25 Correct 3 ms 376 KB Output is correct
26 Correct 3 ms 504 KB Output is correct
27 Correct 6 ms 376 KB Output is correct
28 Correct 3 ms 504 KB Output is correct
29 Correct 3 ms 376 KB Output is correct
30 Correct 3 ms 508 KB Output is correct
31 Correct 5 ms 504 KB Output is correct
32 Correct 6 ms 504 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 677 ms 30600 KB Output is correct
2 Correct 203 ms 30532 KB Output is correct
3 Correct 246 ms 30536 KB Output is correct
4 Correct 277 ms 30584 KB Output is correct

Subtask #4
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 348 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 3 ms 376 KB Output is correct
24 Correct 3 ms 376 KB Output is correct
25 Correct 3 ms 504 KB Output is correct
26 Correct 3 ms 376 KB Output is correct
27 Correct 6 ms 376 KB Output is correct
28 Correct 3 ms 376 KB Output is correct
29 Correct 3 ms 504 KB Output is correct
30 Correct 3 ms 504 KB Output is correct
31 Correct 5 ms 376 KB Output is correct
32 Correct 6 ms 376 KB Output is correct
33 Correct 64 ms 29816 KB Output is correct
34 Correct 61 ms 29816 KB Output is correct
35 Correct 93 ms 29688 KB Output is correct
36 Correct 80 ms 29700 KB Output is correct
37 Correct 118 ms 29816 KB Output is correct
38 Correct 68 ms 32644 KB Output is correct
39 Correct 49 ms 31608 KB Output is correct
40 Correct 67 ms 35448 KB Output is correct
41 Correct 82 ms 31736 KB Output is correct
42 Correct 108 ms 31736 KB Output is correct
43 Correct 58 ms 35972 KB Output is correct
44 Correct 57 ms 35832 KB Output is correct

Subtask #5
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 348 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 348 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 3 ms 504 KB Output is correct
24 Correct 3 ms 376 KB Output is correct
25 Correct 3 ms 376 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 6 ms 376 KB Output is correct
28 Correct 4 ms 504 KB Output is correct
29 Correct 3 ms 376 KB Output is correct
30 Correct 3 ms 504 KB Output is correct
31 Correct 5 ms 504 KB Output is correct
32 Correct 6 ms 504 KB Output is correct
33 Correct 670 ms 30796 KB Output is correct
34 Correct 205 ms 30796 KB Output is correct
35 Correct 239 ms 32320 KB Output is correct
36 Correct 291 ms 38164 KB Output is correct
37 Correct 73 ms 33528 KB Output is correct
38 Correct 63 ms 33512 KB Output is correct
39 Correct 94 ms 40440 KB Output is correct
40 Correct 82 ms 40440 KB Output is correct
41 Correct 118 ms 31736 KB Output is correct
42 Correct 67 ms 32632 KB Output is correct
43 Correct 48 ms 31608 KB Output is correct
44 Correct 72 ms 35660 KB Output is correct
45 Correct 81 ms 31744 KB Output is correct
46 Correct 107 ms 31836 KB Output is correct
47 Correct 56 ms 35832 KB Output is correct
48 Correct 56 ms 35960 KB Output is correct
49 Correct 223 ms 35576 KB Output is correct
50 Correct 197 ms 35576 KB Output is correct
51 Correct 274 ms 42488 KB Output is correct
52 Correct 157 ms 41920 KB Output is correct
53 Correct 764 ms 34200 KB Output is correct
54 Correct 300 ms 34424 KB Output is correct
55 Correct 149 ms 32632 KB Output is correct
56 Correct 175 ms 37400 KB Output is correct
57 Correct 465 ms 33272 KB Output is correct
58 Correct 722 ms 34108 KB Output is correct
59 Correct 56 ms 35832 KB Output is correct