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Submission #313581

# Submission time Handle Problem Language Result Execution time Memory
313581 2020-10-16T10:24:03 Z brkdnmz Lightning Rod (NOI18_lightningrod) C++17
100 / 100
 1962 ms 49816 KB 
#include <iostream>
#include <fstream>
#include <cstdio>
#include <vector>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>
#include <stack>
#include <queue>
#include <algorithm>
#include <string.h>
#include <string>
#include <math.h>
#include <iomanip>
#include <cassert>
#include <random>
#include <time.h>
using namespace std;

#define SORT(v) sort((v).begin(), (v).end())
#define RSORT(v) sort((v).rbegin(), (v).rend())
#define REVERSE(v) reverse((v).begin(), (v).end())
#define pb push_back
#define FOR(i, n) for(int i = 0; i < (n); i++)
typedef pair<int, int> pii;
typedef long long ll;
typedef unsigned long long ull;
typedef vector<int> vi;

const int mod = 1e9 + 7;
const int mod2 = 998244353;

void fact_init(int n, int md);
ll exp(ll taban, ll us, ll md);
ll ebob(ll a, ll b);
ll ekok(ll a, ll b);
ll komb(ll a, ll b);

vector<ll> fact;
vector<ll> inv_fact;
void fact_init(int n, int md){
    fact.resize(n+5);
    inv_fact.resize(n+5);
    fact[0] = inv_fact[0] = 1;
    for(int i = 1; i <= n; i++){
        fact[i] = (fact[i-1] * i) % md;
        inv_fact[i] = exp(fact[i], md-2, md);
    }
}
ll exp(ll taban, ll us, ll md) {
    ll carpan = taban % md;
    if(carpan == 0) return 0;
    ll temp = us;
    ll res = 1;
    while(temp){
        if(temp % 2) res = (res*carpan) % md;
        temp /= 2;
        carpan = (carpan*carpan) % md;
    }
    return res;
}
 
ll ebob(ll a, ll b){
    if(!a)return b;
    return ebob(b%a, a);
}

ll ekok(ll a, ll b){
    return (a*b)/ebob(a, b);
}

ll komb(int a, int b, int md){
    if(a < b) return 0;
    return fact[a] * (inv_fact[a-b] * inv_fact[b] % md) % md;
}

ll mul(ll a, ll b, int md){
	return a*b % md;
}
const int N = 1e5 + 5;

int main(){
    ios::sync_with_stdio(false); cin.tie(NULL);
	stack<int> st;
	int mx = -1e9;
	int n; cin>>n;
	for(int i = 0; i < n; i++){
		int x, y; cin>>x>>y;
		if(mx >= x+y) continue;
		while(!st.empty() && st.top() <= y-x){
			st.pop();
		}
		st.push(y-x);
		mx = x+y;
	}
	cout<<st.size()<<"\n";
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1651 ms 40500 KB Output is correct
2 Correct 1650 ms 49816 KB Output is correct
3 Correct 1613 ms 48508 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct

Subtask #4
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct

Subtask #5
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 42 ms 384 KB Output is correct
15 Correct 42 ms 384 KB Output is correct
16 Correct 39 ms 640 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1672 ms 26004 KB Output is correct
2 Correct 1655 ms 34080 KB Output is correct
3 Correct 1620 ms 33196 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1651 ms 40500 KB Output is correct
2 Correct 1650 ms 49816 KB Output is correct
3 Correct 1613 ms 48508 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 42 ms 384 KB Output is correct
18 Correct 42 ms 384 KB Output is correct
19 Correct 39 ms 640 KB Output is correct
20 Correct 1672 ms 26004 KB Output is correct
21 Correct 1655 ms 34080 KB Output is correct
22 Correct 1620 ms 33196 KB Output is correct
23 Correct 1962 ms 22468 KB Output is correct
24 Correct 1957 ms 43000 KB Output is correct
25 Correct 1876 ms 39020 KB Output is correct