Submission #908130

#	Time	Username	Problem	Language	Result	Execution time	Memory
908130		Alfraganus	Lamps (JOI19_lamps)	C++17	0 / 100	1 ms	348 KiB

lamp

#pragma GCC optimize("unroll-loops")
#pragma gcc optimize("Ofast")
#pragma GCC optimization("Ofast")
#pragma optimize(Ofast)
#include <bits/stdc++.h>
using namespace std;

#define int long long
#define str string
#define fastio ios::sync_with_stdio(0), cin.tie(0);
#define fs first
#define ss second
#define endl '\n'
#define all(x) (x).begin(), (x).end()
#define len(x) x.size()

#define print(a)          \
    for (auto &x : a)     \
        cout << x << " "; \
    cout << endl;

#define printmp(a)    \
    for (auto &x : a) \
        cout << x.fs << " " << x.ss << endl;

const int mod = 998244353;

void solve(){
    int n;
    cin >> n;
    str a, b;
    cin >> a >> b;
    int ans = 0;
    for(int i = 1; i < n; i ++){
        if(b[i - 1] == '1' and b[i] == '0')
            ans ++;
    }
    cout << ans;
}

signed main()
{
    fastio int t = 1;
    // cin >> t;
    while (t--)
    {
        solve();
        cout << endl;
    }
}

Compilation message (stderr)

lamp.cpp:2: warning: ignoring '#pragma gcc optimize' [-Wunknown-pragmas]
    2 | #pragma gcc optimize("Ofast")
      | 
lamp.cpp:3: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    3 | #pragma GCC optimization("Ofast")
      | 
lamp.cpp:4: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    4 | #pragma optimize(Ofast)
      |

• Subtask 1: 0 / 6
• Subtask 2: 0 / 41
• Subtask 3: 0 / 4
• Subtask 4: 0 / 49