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답안 #984246

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
984246 2024-05-16T12:00:24 Z LucaIlie 말 (IOI15_horses) C++17
34 / 100
 1500 ms 46520 KB 
#include "horses.h"
#include <bits/stdc++.h>

using namespace std;

const int MAX_N = 5e5;
const int MOD = 1e9 + 7;

struct AIB1 {
    int aib[MAX_N + 1];

    void init() {
        for ( int i = 0; i <= MAX_N; i++ )
            aib[i] = 1;
    }

    void update( int i, int x ) {
        while ( i <= MAX_N ) {
            aib[i] = (long long)aib[i] * x % MOD;
            i += (i & -i);
        }
    }

    int query( int i ) {
        int p = 1;
        while ( i > 0 ) {
            p = (long long)p * aib[i] % MOD;
            i -= (i & -i);
        }
        return p;
    }
} horses;

struct AIB2 {
    double aib[MAX_N + 1];


    void init() {
        for ( int i = 0; i <= MAX_N; i++ )
            aib[i] = 0;
    }

    void update( int i, double x ) {
        while ( i <= MAX_N ) {
            aib[i] += x;
            i += (i & -i);
        }
    }

    double query( int i ) {
        double p = 0;
        while ( i > 0 ) {
            p += aib[i];
            i -= (i & -i);
        }
        return p;
    }
} cost;

int lgPut( int a, int n ) {
    if ( n == 0 )
        return 1;

    int p = lgPut( a, n / 2 );
    p = (long long)p * p % MOD;
    if ( n % 2 == 1 )
        p = (long long)p * a % MOD;

    return p;
}

int inv( int x ) {
    return lgPut( x, MOD - 2 );
}

int n;
int x[MAX_N + 1], y[MAX_N + 1];
set<pair<double, int>> s;


void calc() {
    s.clear();
    horses.init();
    cost.init();
    for ( int i = 1; i <= n; i++ ) {
        horses.update( i, x[i] );
        cost.update( i, log( x[i] ) );
        s.insert( { cost.query( i ) + log( y[i] ), i } );
    }
}

int answer() {
    int i = s.rbegin()->second;
    return (long long)horses.query( i ) * y[i] % MOD;
}

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

    for ( int i = n - 1; i >= 0; i-- )
        x[i + 1] = X[i], y[i + 1] = Y[i];

    
    calc();
    return answer();
}

int updateX( int pos, int val ) {
    int i = pos + 1;

    s.erase( { cost.query( i ) + log( y[i] ), i } );
    cost.update( i, -log( x[i] ) );
    horses.update( i, inv( x[i] ) );

    x[i] = val;

    cost.update( i, log( x[i] ) );
    horses.update( i, x[i] );
    s.insert( { cost.query( i ) + log( y[i] ), i } );
	calc();
    return answer();
}

int updateY( int pos, int val ) {
    int i = pos + 1;

    s.erase( { cost.query( i ) + log( y[i] ), i } );
    y[i] = val;
    s.insert( { cost.query( i ) + log( y[i] ), i } );

  
    return answer();
}

Compilation message

horses.cpp: In member function 'void AIB1::update(int, int)':
horses.cpp:19:44: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   19 |             aib[i] = (long long)aib[i] * x % MOD;
      |                      ~~~~~~~~~~~~~~~~~~~~~~^~~~~
horses.cpp: In member function 'int AIB1::query(int)':
horses.cpp:27:39: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   27 |             p = (long long)p * aib[i] % MOD;
      |                 ~~~~~~~~~~~~~~~~~~~~~~^~~~~
horses.cpp: In function 'int lgPut(int, int)':
horses.cpp:65:26: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   65 |     p = (long long)p * p % MOD;
      |         ~~~~~~~~~~~~~~~~~^~~~~
horses.cpp:67:30: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   67 |         p = (long long)p * a % MOD;
      |             ~~~~~~~~~~~~~~~~~^~~~~
horses.cpp: In function 'int answer()':
horses.cpp:94:48: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   94 |     return (long long)horses.query( i ) * y[i] % MOD;
      |            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~

Subtask #1
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9820 KB Output is correct
2 Correct 2 ms 9820 KB Output is correct
3 Correct 2 ms 9820 KB Output is correct
4 Correct 2 ms 9820 KB Output is correct
5 Correct 2 ms 10060 KB Output is correct
6 Correct 3 ms 9820 KB Output is correct
7 Correct 2 ms 9820 KB Output is correct
8 Correct 2 ms 9820 KB Output is correct
9 Correct 2 ms 9816 KB Output is correct
10 Correct 2 ms 9820 KB Output is correct
11 Correct 2 ms 9820 KB Output is correct
12 Correct 2 ms 9820 KB Output is correct
13 Correct 2 ms 9820 KB Output is correct
14 Correct 2 ms 9820 KB Output is correct
15 Correct 2 ms 9816 KB Output is correct
16 Correct 2 ms 9816 KB Output is correct
17 Correct 2 ms 9820 KB Output is correct
18 Correct 2 ms 9820 KB Output is correct
19 Correct 2 ms 9816 KB Output is correct
20 Correct 2 ms 9820 KB Output is correct

Subtask #2
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9816 KB Output is correct
2 Correct 2 ms 9820 KB Output is correct
3 Correct 2 ms 9820 KB Output is correct
4 Correct 2 ms 9820 KB Output is correct
5 Correct 2 ms 9816 KB Output is correct
6 Correct 2 ms 9816 KB Output is correct
7 Correct 2 ms 9820 KB Output is correct
8 Correct 2 ms 9820 KB Output is correct
9 Correct 2 ms 9820 KB Output is correct
10 Correct 2 ms 9820 KB Output is correct
11 Correct 2 ms 9820 KB Output is correct
12 Correct 2 ms 9820 KB Output is correct
13 Correct 2 ms 9820 KB Output is correct
14 Correct 2 ms 9820 KB Output is correct
15 Correct 2 ms 9820 KB Output is correct
16 Correct 2 ms 9820 KB Output is correct
17 Correct 2 ms 10016 KB Output is correct
18 Correct 2 ms 9820 KB Output is correct
19 Correct 3 ms 9816 KB Output is correct
20 Correct 2 ms 9820 KB Output is correct
21 Correct 4 ms 9816 KB Output is correct
22 Correct 5 ms 9820 KB Output is correct
23 Correct 198 ms 10076 KB Output is correct
24 Correct 188 ms 10072 KB Output is correct
25 Correct 195 ms 10124 KB Output is correct
26 Correct 182 ms 10072 KB Output is correct
27 Correct 203 ms 10076 KB Output is correct
28 Correct 381 ms 10124 KB Output is correct
29 Correct 369 ms 10076 KB Output is correct
30 Correct 367 ms 10116 KB Output is correct
31 Correct 11 ms 10076 KB Output is correct
32 Correct 190 ms 10120 KB Output is correct

Subtask #3
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 190 ms 46520 KB Output is correct
2 Execution timed out 1544 ms 45388 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9820 KB Output is correct
2 Correct 2 ms 9816 KB Output is correct
3 Correct 2 ms 9820 KB Output is correct
4 Correct 2 ms 10016 KB Output is correct
5 Correct 2 ms 9820 KB Output is correct
6 Correct 2 ms 9816 KB Output is correct
7 Correct 2 ms 9820 KB Output is correct
8 Correct 2 ms 9816 KB Output is correct
9 Correct 2 ms 9820 KB Output is correct
10 Correct 2 ms 9928 KB Output is correct
11 Correct 2 ms 9820 KB Output is correct
12 Correct 2 ms 9820 KB Output is correct
13 Correct 2 ms 9820 KB Output is correct
14 Correct 2 ms 9820 KB Output is correct
15 Correct 2 ms 9820 KB Output is correct
16 Correct 2 ms 9820 KB Output is correct
17 Correct 2 ms 9820 KB Output is correct
18 Correct 2 ms 9820 KB Output is correct
19 Correct 2 ms 9820 KB Output is correct
20 Correct 2 ms 9820 KB Output is correct
21 Correct 3 ms 9820 KB Output is correct
22 Correct 6 ms 9820 KB Output is correct
23 Correct 200 ms 10112 KB Output is correct
24 Correct 199 ms 10320 KB Output is correct
25 Correct 175 ms 10112 KB Output is correct
26 Correct 183 ms 10116 KB Output is correct
27 Correct 208 ms 10072 KB Output is correct
28 Correct 371 ms 10072 KB Output is correct
29 Correct 382 ms 10076 KB Output is correct
30 Correct 359 ms 10116 KB Output is correct
31 Correct 11 ms 10076 KB Output is correct
32 Correct 194 ms 10120 KB Output is correct
33 Execution timed out 1567 ms 45264 KB Time limit exceeded
34 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9816 KB Output is correct
2 Correct 2 ms 9820 KB Output is correct
3 Correct 2 ms 9820 KB Output is correct
4 Correct 2 ms 9820 KB Output is correct
5 Correct 2 ms 9816 KB Output is correct
6 Correct 2 ms 9820 KB Output is correct
7 Correct 2 ms 9820 KB Output is correct
8 Correct 2 ms 9820 KB Output is correct
9 Correct 2 ms 9820 KB Output is correct
10 Correct 2 ms 9816 KB Output is correct
11 Correct 3 ms 9820 KB Output is correct
12 Correct 2 ms 9820 KB Output is correct
13 Correct 2 ms 9820 KB Output is correct
14 Correct 2 ms 9820 KB Output is correct
15 Correct 2 ms 9820 KB Output is correct
16 Correct 2 ms 9820 KB Output is correct
17 Correct 2 ms 9820 KB Output is correct
18 Correct 2 ms 9820 KB Output is correct
19 Correct 2 ms 9820 KB Output is correct
20 Correct 2 ms 9820 KB Output is correct
21 Correct 3 ms 9820 KB Output is correct
22 Correct 5 ms 9820 KB Output is correct
23 Correct 195 ms 10076 KB Output is correct
24 Correct 186 ms 10072 KB Output is correct
25 Correct 176 ms 10072 KB Output is correct
26 Correct 181 ms 10072 KB Output is correct
27 Correct 210 ms 10120 KB Output is correct
28 Correct 398 ms 10124 KB Output is correct
29 Correct 367 ms 10328 KB Output is correct
30 Correct 362 ms 10124 KB Output is correct
31 Correct 12 ms 10076 KB Output is correct
32 Correct 202 ms 10112 KB Output is correct
33 Correct 183 ms 46420 KB Output is correct
34 Execution timed out 1551 ms 45392 KB Time limit exceeded
35 Halted 0 ms 0 KB -