oj.uz

Submission #62940

# Submission time Handle Problem Language Result Execution time Memory
62940 2018-07-31T01:59:07 Z updown1 Horses (IOI15_horses) C++17
17 / 100
 783 ms 44908 KB 
/*
segtree. Each element i stores (X[0]*X[1]*...*X[i]*Y[i])%MOD
*/
#include "horses.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define For(i, a, b) for(int i=a; i<b; i++)
#define ffi For(i, 0, N1)
#define ffj For(j, 0, P)
#define ffa ffi ffj
//#define s <<" "<<
//#define c <<" : "<<
#define w cout
#define e endl
#define pb push_back
#define mp make_pair
#define a first
#define b second
//#define int ll
const ll MAXN = 500000, MOD = 1000000007;
int N1;
ll tree[4*MAXN+1], lazy[4*MAXN+1], xx[MAXN], yy[MAXN];

ll mI(ll x, ll y) { /// call mI(x, MOD-2)
    /// x^y
    if (y == 0) return 1;
    if (y == 1) return x;
    ll p = mI(x, y/2);
    p = (p*p)%MOD;
    if (y%2 == 1) p = (p*x)%MOD;
    return p;
}

void push(int x, int L, int R) {
    tree[x] *= lazy[x];
    tree[x] %= MOD;
    if (L != R) {
        lazy[x*2] *= lazy[x];
        lazy[x*2] %= MOD;
        lazy[x*2+1] *= lazy[x];
        lazy[x*2+1] %= MOD;
    }
    lazy[x] = 1;
}
void update(int x, int L, int R, int oL, int oR, ll v) {
    push(x, L, R);
    if (R < oL || oR < L) return;
    if (oL <= L && R <= oR) {
        lazy[x] *= v;
        lazy[x] %= MOD;
        push(x, L, R);
        return;
    }
    update(x*2, L, (L+R)/2, oL, oR, v);
    update(x*2+1,(L+R)/2+1,R,oL, oR, v);
    tree[x] = max(tree[x*2], tree[x*2+1]);
}
int answer() {
    push(1, 0, N1-1);
    assert(tree[1] > 0);
    return tree[1];
}

int init(int N, int X[], int Y[]) {
    N1 = N;
    For (i, 0, 4*MAXN+1) tree[i] = lazy[i] = 1;
    ffi xx[i] = X[i], yy[i] = Y[i];
    ffi update(1, 0, N-1, i, N-1, X[i]), update(1, 0, N-1, i, i, Y[i]);
    return answer();
}
int updateX(int pos, int val) {
    //w<< pos << " " << val << " " << (mI(xx[pos], MOD-2)*xx[pos])%MOD<<e;
    update(1, 0, N1-1, pos, N1-1, mI(xx[pos], MOD-2));
    update(1, 0, N1-1, pos, N1-1, val);
    xx[pos] = val;
	return answer();
}
int updateY(int pos, int val) {
    update(1, 0, N1-1, pos, pos, mI(yy[pos], MOD-2));
    update(1, 0, N1-1, pos, pos, val);
    yy[pos] = val;
	return answer();
}

Compilation message

horses.cpp: In function 'int answer()':
horses.cpp:62:18: warning: conversion to 'int' from 'll {aka long long int}' may alter its value [-Wconversion]
     return tree[1];
            ~~~~~~^

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 31608 KB Output is correct
2 Correct 29 ms 31716 KB Output is correct
3 Correct 26 ms 31716 KB Output is correct
4 Correct 25 ms 31716 KB Output is correct
5 Correct 32 ms 31716 KB Output is correct
6 Correct 28 ms 31840 KB Output is correct
7 Correct 32 ms 31840 KB Output is correct
8 Correct 31 ms 32036 KB Output is correct
9 Correct 26 ms 32036 KB Output is correct
10 Correct 30 ms 32036 KB Output is correct
11 Correct 35 ms 32036 KB Output is correct
12 Correct 35 ms 32036 KB Output is correct
13 Correct 31 ms 32036 KB Output is correct
14 Correct 28 ms 32036 KB Output is correct
15 Correct 28 ms 32036 KB Output is correct
16 Correct 28 ms 32036 KB Output is correct
17 Correct 29 ms 32036 KB Output is correct
18 Correct 36 ms 32036 KB Output is correct
19 Correct 28 ms 32036 KB Output is correct
20 Correct 30 ms 32036 KB Output is correct

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 32036 KB Output is correct
2 Correct 26 ms 32036 KB Output is correct
3 Correct 26 ms 32036 KB Output is correct
4 Correct 31 ms 32036 KB Output is correct
5 Correct 28 ms 32036 KB Output is correct
6 Correct 30 ms 32036 KB Output is correct
7 Correct 33 ms 32036 KB Output is correct
8 Correct 33 ms 32036 KB Output is correct
9 Correct 29 ms 32036 KB Output is correct
10 Correct 28 ms 32036 KB Output is correct
11 Correct 30 ms 32036 KB Output is correct
12 Correct 30 ms 32036 KB Output is correct
13 Correct 28 ms 32036 KB Output is correct
14 Correct 27 ms 32036 KB Output is correct
15 Correct 29 ms 32036 KB Output is correct
16 Correct 30 ms 32036 KB Output is correct
17 Correct 26 ms 32036 KB Output is correct
18 Correct 25 ms 32036 KB Output is correct
19 Correct 29 ms 32036 KB Output is correct
20 Correct 31 ms 32036 KB Output is correct
21 Incorrect 29 ms 32036 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 783 ms 44908 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 44908 KB Output is correct
2 Correct 25 ms 44908 KB Output is correct
3 Correct 26 ms 44908 KB Output is correct
4 Correct 29 ms 44908 KB Output is correct
5 Correct 28 ms 44908 KB Output is correct
6 Correct 28 ms 44908 KB Output is correct
7 Correct 29 ms 44908 KB Output is correct
8 Correct 25 ms 44908 KB Output is correct
9 Correct 32 ms 44908 KB Output is correct
10 Correct 30 ms 44908 KB Output is correct
11 Correct 29 ms 44908 KB Output is correct
12 Correct 26 ms 44908 KB Output is correct
13 Correct 26 ms 44908 KB Output is correct
14 Correct 27 ms 44908 KB Output is correct
15 Correct 26 ms 44908 KB Output is correct
16 Correct 32 ms 44908 KB Output is correct
17 Correct 31 ms 44908 KB Output is correct
18 Correct 26 ms 44908 KB Output is correct
19 Correct 26 ms 44908 KB Output is correct
20 Correct 33 ms 44908 KB Output is correct
21 Incorrect 29 ms 44908 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 44908 KB Output is correct
2 Correct 30 ms 44908 KB Output is correct
3 Correct 30 ms 44908 KB Output is correct
4 Correct 28 ms 44908 KB Output is correct
5 Correct 27 ms 44908 KB Output is correct
6 Correct 29 ms 44908 KB Output is correct
7 Correct 28 ms 44908 KB Output is correct
8 Correct 28 ms 44908 KB Output is correct
9 Correct 31 ms 44908 KB Output is correct
10 Correct 36 ms 44908 KB Output is correct
11 Correct 26 ms 44908 KB Output is correct
12 Correct 26 ms 44908 KB Output is correct
13 Correct 26 ms 44908 KB Output is correct
14 Correct 26 ms 44908 KB Output is correct
15 Correct 26 ms 44908 KB Output is correct
16 Correct 25 ms 44908 KB Output is correct
17 Correct 40 ms 44908 KB Output is correct
18 Correct 28 ms 44908 KB Output is correct
19 Correct 30 ms 44908 KB Output is correct
20 Correct 26 ms 44908 KB Output is correct
21 Incorrect 31 ms 44908 KB Output isn't correct
22 Halted 0 ms 0 KB -