oj.uz

답안 #590865

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
590865 2022-07-06T12:28:34 Z AlperenT 말 (IOI15_horses) C++17
17 / 100
 667 ms 104976 KB 
#include <bits/stdc++.h>
#include "horses.h"

using namespace std;

const int N = 5e5 + 5, MOD = 1e9 + 7;

struct mint{
    int val;

    mint(long long a = 0) : val(a % MOD) {if(val < 0) val += MOD; }
    mint(long long a, long long b) {*this += a, *this /= b; }

    mint &operator += (const mint &b) {val += b.val; if(val >= MOD) val -= MOD; return *this; }
    mint &operator -= (const mint &b) {val -= b.val; if(val < 0) val += MOD; return *this; }
    mint &operator *= (const mint &b) {val = (1ll * val * b.val) % MOD; return *this; }
    mint &operator /= (const mint &b) {*this *= minv(b); return *this; }

    mint &operator ++ () {return *this += 1; }
    mint operator ++ (int) {mint tmp = *this; *this += 1; return tmp; }

    mint &operator -- () {return *this -= 1; }
    mint operator -- (int) {mint tmp = *this; *this -= 1; return tmp; }

    friend mint operator + (mint a, const mint &b) {return a += b; }
    friend mint operator - (mint a, const mint &b) {return a -= b; }
    friend mint operator - (const mint &a) {return 0 - a; }
    friend mint operator * (mint a, const mint &b) {return a *= b; }
    friend mint operator / (mint a, const mint &b) {return a /= b; }

    friend istream &operator >> (istream &is, mint &a) {long long b; cin >> b; a = b; return is; }
    friend ostream &operator << (ostream &os, const mint &a) {cout << a.val; return os; }

    mint mexp(mint a, long long b){
        mint c = 1;
        for(; b > 0; b /= 2, a *= a) if(b & 1) c *= a;
        return c;
    }

    mint minv(const mint &a) {return mexp(a, MOD - 2); }
};

int n, x[N], y[N];

struct SegTree{
	pair<long double, int> tree[N * 4];
	long double lazy[N * 4];

	void push(int v){
		if(lazy[v]){
			tree[v].first += lazy[v];

			if(v * 2 < N * 4) lazy[v * 2] += lazy[v], lazy[v * 2 + 1] += lazy[v];

			lazy[v] = 0;
		}
	}

	pair<long double, int> merge(pair<long double, int> a, pair<long double, int> b){
		return max(a, b);
	}

	void build(int v = 1, int l = 0, int r = n - 1){
		if(l == r) tree[v] = {0, l};
		else{
			int m = l + (r - l) / 2;

			build(v * 2, l, m);
			build(v * 2 + 1, m + 1, r);

			tree[v] = merge(tree[v * 2], tree[v * 2 + 1]);
		}
	}

	void update(int l, int r, long double val, int v = 1, int tl = 0, int tr = n - 1){
		if(l > r) return;
		else if(tl == l && tr == r) lazy[v] += val;
		else{
			push(v);

			int tm = tl + (tr - tl) / 2;

			update(l, min(r, tm), val, v * 2, tl, tm);
			update(max(l, tm + 1), r, val, v * 2 + 1, tm + 1, tr);

			push(v * 2), push(v * 2 + 1);

			tree[v] = merge(tree[v * 2], tree[v * 2 + 1]);
		}
	}

	int query(){
		push(1);
		return tree[1].second;
	}
};

SegTree sgt;

struct Fenwick{
	mint tree[N];

	Fenwick(){
		fill(tree, tree + N, mint(1));
	}

	mint query(int r){
		mint ans = 1;
		for(int i = r + 1; i > 0; i -= i & -i) ans *= tree[i];
		return ans;
	}

	void update(int pos, mint val){
		for(int i = pos + 1; i < N; i += i & -i) tree[i] *= val;
	}
};

Fenwick fw;

int init(int N_, int X[], int Y[]){
	n = N_;

	copy(X, X + n, x);
	copy(Y, Y + n, y);

	sgt.build();

	for(int i = 0; i < n; i++){
		sgt.update(i, n - 1, log(x[i]));
		sgt.update(i, i, log(y[i]));

		fw.update(i, x[i]);
	}

	int ans = sgt.query();

	return (fw.query(ans) * y[ans]).val;
}

int updateX(int pos, int val){	
	sgt.update(pos, n, val - x[pos]);
	fw.update(pos, mint(val) / x[pos]);

	x[pos] = val;

	int ans = sgt.query();

	return (fw.query(ans) * y[ans]).val;
}

int updateY(int pos, int val){
	sgt.update(pos, pos, val - y[pos]);
	y[pos] = val;

	int ans = sgt.query();

	return (fw.query(ans) * y[ans]).val;;
}

Compilation message

horses.cpp: In constructor 'mint::mint(long long int)':
horses.cpp:11:35: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   11 |     mint(long long a = 0) : val(a % MOD) {if(val < 0) val += MOD; }
      |                                 ~~^~~~~
horses.cpp: In member function 'mint& mint::operator*=(const mint&)':
horses.cpp:16:66: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   16 |     mint &operator *= (const mint &b) {val = (1ll * val * b.val) % MOD; return *this; }
      |                                              ~~~~~~~~~~~~~~~~~~~~^~~~~

Subtask #1
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 64852 KB Output is correct
2 Correct 30 ms 64860 KB Output is correct
3 Correct 28 ms 64964 KB Output is correct
4 Correct 25 ms 64832 KB Output is correct
5 Correct 26 ms 64840 KB Output is correct
6 Correct 31 ms 64820 KB Output is correct
7 Correct 25 ms 64860 KB Output is correct
8 Correct 24 ms 64852 KB Output is correct
9 Correct 26 ms 64876 KB Output is correct
10 Correct 25 ms 64832 KB Output is correct
11 Correct 25 ms 64804 KB Output is correct
12 Correct 24 ms 64892 KB Output is correct
13 Correct 25 ms 64860 KB Output is correct
14 Correct 26 ms 64836 KB Output is correct
15 Correct 29 ms 64852 KB Output is correct
16 Correct 27 ms 64852 KB Output is correct
17 Correct 27 ms 64876 KB Output is correct
18 Correct 25 ms 64796 KB Output is correct
19 Correct 26 ms 64800 KB Output is correct
20 Correct 26 ms 64892 KB Output is correct

Subtask #2
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 29 ms 64840 KB Output is correct
2 Correct 24 ms 64884 KB Output is correct
3 Correct 25 ms 64800 KB Output is correct
4 Correct 31 ms 64904 KB Output is correct
5 Correct 26 ms 64848 KB Output is correct
6 Correct 27 ms 64852 KB Output is correct
7 Correct 33 ms 64836 KB Output is correct
8 Correct 25 ms 64788 KB Output is correct
9 Correct 25 ms 64832 KB Output is correct
10 Correct 29 ms 64844 KB Output is correct
11 Correct 25 ms 64884 KB Output is correct
12 Correct 25 ms 64804 KB Output is correct
13 Correct 25 ms 64912 KB Output is correct
14 Correct 25 ms 64864 KB Output is correct
15 Correct 26 ms 64804 KB Output is correct
16 Correct 24 ms 64780 KB Output is correct
17 Correct 30 ms 64784 KB Output is correct
18 Correct 30 ms 64876 KB Output is correct
19 Correct 24 ms 64824 KB Output is correct
20 Correct 25 ms 64900 KB Output is correct
21 Incorrect 26 ms 64904 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 667 ms 104976 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 64852 KB Output is correct
2 Correct 25 ms 64920 KB Output is correct
3 Correct 28 ms 64912 KB Output is correct
4 Correct 24 ms 64852 KB Output is correct
5 Correct 25 ms 64784 KB Output is correct
6 Correct 28 ms 64820 KB Output is correct
7 Correct 32 ms 64872 KB Output is correct
8 Correct 30 ms 64796 KB Output is correct
9 Correct 31 ms 64844 KB Output is correct
10 Correct 27 ms 64876 KB Output is correct
11 Correct 25 ms 64856 KB Output is correct
12 Correct 27 ms 64872 KB Output is correct
13 Correct 26 ms 64820 KB Output is correct
14 Correct 25 ms 64852 KB Output is correct
15 Correct 25 ms 64788 KB Output is correct
16 Correct 26 ms 64804 KB Output is correct
17 Correct 28 ms 64852 KB Output is correct
18 Correct 26 ms 64896 KB Output is correct
19 Correct 26 ms 64860 KB Output is correct
20 Correct 28 ms 64780 KB Output is correct
21 Incorrect 27 ms 64824 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 64832 KB Output is correct
2 Correct 25 ms 64852 KB Output is correct
3 Correct 29 ms 64844 KB Output is correct
4 Correct 26 ms 64912 KB Output is correct
5 Correct 27 ms 64900 KB Output is correct
6 Correct 25 ms 64800 KB Output is correct
7 Correct 26 ms 64840 KB Output is correct
8 Correct 25 ms 64852 KB Output is correct
9 Correct 25 ms 64784 KB Output is correct
10 Correct 26 ms 64852 KB Output is correct
11 Correct 31 ms 64844 KB Output is correct
12 Correct 28 ms 64776 KB Output is correct
13 Correct 26 ms 64788 KB Output is correct
14 Correct 25 ms 64888 KB Output is correct
15 Correct 27 ms 64908 KB Output is correct
16 Correct 25 ms 64852 KB Output is correct
17 Correct 25 ms 64884 KB Output is correct
18 Correct 30 ms 64864 KB Output is correct
19 Correct 27 ms 64900 KB Output is correct
20 Correct 27 ms 64796 KB Output is correct
21 Incorrect 27 ms 64852 KB Output isn't correct
22 Halted 0 ms 0 KB -