Submission #1047179

#	Time	Username	Problem	Language	Result	Execution time	Memory
1047179		KarolZ	Trains (BOI24_trains)	C++14	71 / 100	2126 ms	809344 KiB

Main

#include<iostream>
#include<vector>
#include<map>
#pragma GCC optimize "Ofast"
using namespace std;
typedef long long ll;
const ll mod=1000000007;
map<int,ll>m[100010];//pozycja,o ile skok, ile dodac
map<int,ll>::iterator it;
int suck_int(){
	char c=getchar_unlocked();
	int wyn=0;
	while(c>='0'&&c<='9'){
		wyn=wyn*10+c-'0';
		c=getchar_unlocked();
	}
	return wyn;
}
int main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
	ll n,v1,v2,wyn=0,akt;
	//cin>>n;
	n=suck_int();
	for(int i=1;i<=n;i++){
		akt=0;
		if(i==1)akt++;
		for(it=m[i].begin();it!=m[i].end();it++){
			akt+=it->second;
			if(i+it->first<=n)m[i+it->first][it->first]+=it->second%mod;
	//		else break;
		}
		//cin>>v1>>v2;
		v1=suck_int();
		v2=suck_int();
		if(i+v1<=n)m[i+v1][v1]+=akt%mod;
		if(i+v1*(v2+1)<=n&&i+v2<=n)m[i+v1*(v2+1)][v1]-=akt%mod-mod;
		wyn+=akt;
		wyn%=mod;
	}
	cout<<wyn;
	return 0;
}

• Subtask 1: 8 / 8
• Subtask 2: 13 / 13
• Subtask 3: 16 / 16
• Subtask 4: 34 / 34
• Subtask 5: 0 / 29