Submission #743068

#	Time	Username	Problem	Language	Result	Execution time	Memory
743068		vjudge1	Lightning Rod (NOI18_lightningrod)	C++17	4 / 100	1667 ms	304 KiB

Main

#include<bits/stdc++.h>
using namespace std;

#define iii tuple<int,int,int>
int n;
int cnt = 0;
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> n;
    int recent;
    cnt = n;
    for(int i=1;i<=n;++i)
    {
        int x,y;
        cin >> x >> y;
        if(y == 1 && recent == 0) --cnt;
        if(y == 0 && recent == 1) --cnt;
        recent = y;
    }
    cout << cnt;
    return 0;
}

Compilation message (stderr)

lightningrod.cpp: In function 'int main()':
lightningrod.cpp:17:19: warning: 'recent' may be used uninitialized in this function [-Wmaybe-uninitialized]
   17 |         if(y == 1 && recent == 0) --cnt;
      |            ~~~~~~~^~~~~~~~~~~~~~

• Subtask 1: 4 / 4
• Subtask 2: 0 / 7
• Subtask 3: 0 / 12
• Subtask 4: 0 / 21
• Subtask 5: 0 / 26
• Subtask 6: 0 / 10
• Subtask 7: 0 / 20