Submission #21099505

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Source Code Expand

#include <bits/stdc++.h>
#define PI 3.14159265359
#define lp(i, n) for (size_t i = 0; i < n; i++)
typedef long long ll;
typedef long double ld;

using namespace std;

const char nl = '\n';

ll p(ll x, int e) {
    ll ret{1};
    for (int i = 0; i < e; i++)
        ret *= x;
    return ret;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    string s;
    cin >> s;
    int i;
    ll ret{};
    for (i = 2; i < s.size(); i += 2) {
        ret += 9 * p(10, i / 2 - 1);
    }
    if (i == s.size()) {
        string h{s.begin(), s.begin() + s.size() / 2};
        stringstream ss{h};
        int fh;
        ss >> fh;
        ret = fh;
        if (h.compare(string{s.begin() + s.size() / 2, s.end()}) > 0)
            ret--;
    }
    cout << ret << nl;
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:26:19: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::__cxx11::basic_string<char>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   26 |     for (i = 2; i < s.size(); i += 2) {
      |                 ~~^~~~~~~~~~
./Main.cpp:29:11: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::__cxx11::basic_string<char>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   29 |     if (i == s.size()) {
      |         ~~^~~~~~~~~~~

Judge Result