Submission #137692

#	Time	Username	Problem	Language	Result	Execution time	Memory
137692		ekrem	Lightning Rod (NOI18_lightningrod)	C++98	100 / 100	596 ms	77636 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;
char ch;
ii a, s[N];

int readInt(){
    int res = 0;
    char ch = 0;
    while(ch < '0') ch = getchar_unlocked();
    for(; ch >= '0'; ch = getchar_unlocked()) res = res * 10 + ch - '0';
    return res;
}
 
void writeInt(int v){
    char buf[14];
    int p = 0;
    if(v == 0) buf[p++] = 0;
    for(; v; v /= 10) buf[p++] = v % 10;
    while(p--) putchar_unlocked(buf[p] + '0');
}

int main(){
	// freopen("in.txt", "r", stdin);
	// freopen("out.txt", "w", stdout);
	n = readInt();
	for(int i = 1; i <= n; i++){
		a.st = readInt();
		a.nd = readInt();
		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;
	}
	writeInt(m);
	return 0;
}

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