Submission #44090544

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Source Code Expand

#include <bits/stdc++.h>
// #define int long long // ....................
// using ll = long long; // ....................
using namespace std;
typedef pair<int, int> pii;

const int e3 = 1000, e6 = e3 * e3, e9 = e6 * e3;
// const int e12 = e9 * e3, e15 = e12 * e3, e18 = e15 * e3; // ....................
const int m998 = 998244353, m197 = 1000000007;

inline void init()
{
}

inline void solve()
{
    int n;
    cin >> n;
    vector<int> v(n);
    for (int &i : v)
        cin >> i;

    int mxidx = max_element(v.begin(), v.end()) - v.begin();
    int mnidx = min_element(v.begin(), v.end()) - v.begin();
    assert(v[mxidx] != v[mnidx] || v[mxidx] == 0);

    vector<pii> ans;
    if (abs(v[mxidx]) > abs(v[mnidx]) || abs(v[mxidx]) == abs(v[mnidx]) && v[0] > 0)
    {
        for (int i = 0; i < n; ++i)
            if (v[i] < 0)
                ans.emplace_back(mxidx, i);
        for (int i = 0; i + 1 < n; ++i)
            ans.emplace_back(i, i + 1);
    }
    else
    {
        for (int i = 0; i < n; ++i)
            if (v[i] > 0)
                ans.emplace_back(mnidx, i);
        for (int i = n - 1; i > 0; --i)
            ans.emplace_back(i, i - 1);
    }
    cout << (int)ans.size() << '\n';
    for (pii i : ans)
        cout << i.first + 1 << ' ' << i.second + 1 << '\n';
}

signed main()
{
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    int tc = 1;

    // cin >> tc; // ....................

    init();
    while (tc--)
        solve();
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘void solve()’:
./Main.cpp:28:73: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
   28 |     if (abs(v[mxidx]) > abs(v[mnidx]) || abs(v[mxidx]) == abs(v[mnidx]) && v[0] > 0)
      |                                          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~

Judge Result