oj.uz

Submission #579505

# Submission time Handle Problem Language Result Execution time Memory
579505 2022-06-19T09:44:12 Z JooDdae Horses (IOI15_horses) C++17
17 / 100
 1500 ms 56200 KB 
#include "horses.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

#define mid ((l+r) >> 1)

const ll INF = 1e9+1;
const int mod = 1e9+7;
int n, x[500500], y[500500];
ll t1[2002002], t3[2002002];
array<int, 2> t2[2002002];
set<int> s;

ll build1(int node = 1, int l = 0, int r = n-1){
    if(l == r) return t1[node] = x[l];
    return t1[node] = min(INF, build1(node*2, l, mid) * build1(node*2+1, mid+1, r));
}

array<int, 2> build2(int node = 1, int l = 0, int r = n-1){
    if(l == r) return t2[node] = {y[l], l};
    return t2[node] = max(build2(node*2, l, mid), build2(node*2+1, mid+1, r));
}

ll build3(int node = 1, int l = 0, int r = n-1){
    if(l == r) return t3[node] = x[l];
    return t3[node] = build3(node*2, l, mid) * build3(node*2+1, mid+1, r) % mod;
}

void update1(int pos, int val, int node = 1, int l = 0, int r = n-1){
    if(pos < l || r < pos) return;
    if(l == r){
        t1[node] = val;
        return;
    }
    update1(pos, val, node*2, l, mid), update1(pos, val, node*2+1, mid+1, r);
    t1[node] = min(INF, t1[node*2] * t1[node*2+1]);
}

void update2(int pos, int val, int node = 1, int l = 0, int r = n-1){
    if(pos < l || r < pos) return;
    if(l == r){
        t2[node][0] = val;
        return;
    }
    update2(pos, val, node*2, l, mid), update2(pos, val, node*2+1, mid+1, r);
    t2[node] = max(t2[node*2], t2[node*2+1]);
}

void update3(int pos, int val, int node = 1, int l = 0, int r = n-1){
    if(pos < l || r < pos) return;
    if(l == r){
        t3[node] = val;
        return;
    }
    update3(pos, val, node*2, l, mid), update3(pos, val, node*2+1, mid+1, r);
    t3[node] = t3[node*2] * t3[node*2+1] % mod;
}

ll find1(int nl, int nr, int node = 1, int l = 0, int r = n-1){
    if(nr < l || r < nl) return 1;
    if(nl <= l && r <= nr) return t1[node];
    return min(INF, find1(nl, nr, node*2, l, mid) * find1(nl, nr, node*2+1, mid+1, r));
}

array<int, 2> find2(int nl, int nr, int node = 1, int l = 0, int r = n-1){
    if(nr < l || r < nl) return {0, 0};
    if(nl <= l && r <= nr) return t2[node];
    return max(find2(nl, nr, node*2, l, mid), find2(nl, nr, node*2+1, mid+1, r));
}

ll find3(int nl, int nr, int node = 1, int l = 0, int r = n-1){
    if(nr < l || r < nl) return 1;
    if(nl <= l && r <= nr) return t3[node];
    return find3(nl, nr, node*2, l, mid) * find3(nl, nr, node*2+1, mid+1, r) % mod;
}

int find_max(int l, int r){
    if(l == r) return r;
    ll k = x[r] * y[r];
    auto mx = find2(l, r-1);
    return k > mx[0] ? r : mx[1];
}

int solve(){
    auto it = s.rbegin();
    int mx = n-1;

    for(int k=0;k<n-1;k++){
        if(y[k] > find1(k+1, mx) * y[mx]) mx = k;
    }

    return find3(0, mx) * y[mx] % mod;
}

int init(int N, int X[], int Y[]) {
    n = N;
    for(int i=0;i<N;i++) x[i] = X[i], y[i] = Y[i];

    s.insert(-1);
    for(int i=0;i<N;i++) if(x[i] > 1) s.insert(i);
    s.insert(N-1);

    build1(), build2(), build3();

    return solve();
}

int updateX(int pos, int val) { 
    if(pos < n-1 && x[pos] > 1) s.erase(pos);
    x[pos] = val, update1(pos, val), update3(pos, val);
    if(x[pos] > 1) s.insert(pos);
    return solve();
}

int updateY(int pos, int val) {
    y[pos] = val, update2(pos, val);
    return solve();
}

Compilation message

horses.cpp: In function 'int solve()':
horses.cpp:93:33: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   93 |     return find3(0, mx) * y[mx] % mod;
      |            ~~~~~~~~~~~~~~~~~~~~~^~~~~
horses.cpp:86:10: warning: variable 'it' set but not used [-Wunused-but-set-variable]
   86 |     auto it = s.rbegin();
      |          ^~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 0 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 76 ms 340 KB Output is correct
24 Correct 81 ms 436 KB Output is correct
25 Incorrect 79 ms 476 KB Output isn't correct
26 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1588 ms 56200 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 72 ms 428 KB Output is correct
24 Correct 73 ms 424 KB Output is correct
25 Incorrect 74 ms 476 KB Output isn't correct
26 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 0 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 72 ms 340 KB Output is correct
24 Correct 73 ms 420 KB Output is correct
25 Incorrect 78 ms 468 KB Output isn't correct
26 Halted 0 ms 0 KB -