Submission #137676

#	Time	Username	Problem	Language	Result	Execution time	Memory
137676		ekrem	Lightning Rod (NOI18_lightningrod)	C++17	66 / 100	2067 ms	73968 KiB

Main

#include <bits/stdc++.h>
#define st first
#define nd second
#define mp make_pair
#define pb push_back
#define coc g[mode][i]
#define sol (k+k)
#define sag (k+k+1)
#define orta ((bas+son)>>1)
#define mod 1000000007
#define inf 1000000009
#define N 10000005

using namespace std;

typedef long long ll;
typedef pair < int , int > ii;
typedef pair < double , double > dd;

int n, m, result, ch;
ii a, s[N];

int readInt () {
	result = 0;
	ch;
	while (true) {
		ch = getchar();
		if (ch < '0' || ch > '9') break;
		result = result*10 + (ch - '0');
	}
	return result;
}

int main(){
	// freopen("in.txt", "r", stdin);
	// freopen("out.txt", "w", stdout);
	// n = readInt();
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	cin >> n;
	// cout << n << endl;
	// ch = getchar();
	for(int i = 1; i <= n; i++){
		// a.st = readInt();
		// a.nd = readInt();
		cin >> a.st >> a.nd;
		// cout << a.st << " " << a.nd << endl;
		while(m and abs(s[m].st - a.st) <= a.nd - s[m].nd)
			m--;
		if(m and abs(s[m].st - a.st) <= s[m].nd - a.nd)
			continue;
		s[++m] = a;
	}
	cout << m;
	return 0;
}

Compilation message (stderr)

lightningrod.cpp: In function 'int readInt()':
lightningrod.cpp:25:4: warning: statement has no effect [-Wunused-value]
  ch;
    ^

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