Submission #1182461

#	Time	Username	Problem	Language	Result	Execution time	Memory
1182461		jahongir	Lamps (JOI19_lamps)	C++20	4 / 100	4 ms	2788 KiB

lamp

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <functional>

using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
// #define int ll
#define f first
#define s second
#define pb push_back
#define eb emplace_back
#define pi pair<int,int>
#define all(a) a.begin(),a.end()
#define rand_seed_set srand(chrono::steady_clock::now().time_since_epoch().count())
#define ordered_set tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update>

void setIO(string name = "") {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    if (name.empty()) {
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    } else {
        freopen((name + ".in").c_str(), "r", stdin);
        freopen((name + ".out").c_str(), "w", stdout);
    }
}


void solve(){
    int n; cin >> n;
    string a,b;
    cin >> a >> b;
    int cnt = 0, st = 0;
    for(int i = 0; i < n; i++){
        if(a[i] != b[i] && st==0){
            cnt++; st = 1;
        }
        if(a[i] == b[i]) st = 0;
    }
    cout << cnt;
}


signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int t = 1;
    // cin >> t;
    while (t--) solve();
}

Compilation message (stderr)

lamp.cpp: In function 'void setIO(std::string)':
lamp.cpp:23:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         freopen("input.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
lamp.cpp:24:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |         freopen("output.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
lamp.cpp:26:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |         freopen((name + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lamp.cpp:27:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |         freopen((name + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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