Submission #1087270

#	Time	Username	Problem	Language	Result	Execution time	Memory
1087270		PieArmy	Toll (BOI17_toll)	C++17	100 / 100	76 ms	19276 KiB

toll

int pie(int army){return (1<<army);}
#include <bits/stdc++.h>
#define endl '\n'
const int sonsuz=1000000005;
using namespace std;

int k,n,m,q;
int nex[50001][16][5];

int main(){
	ios_base::sync_with_stdio(false);cin.tie(NULL);
	cin>>k>>n>>m>>q;
	for(int i=0;i<n;i++){
		for(int j=0;j<16;j++){
			for(int l=0;l<k;l++){
				nex[i][j][l]=sonsuz;
			}
		}
	}
	for(int i=1;i<=m;i++){
		int a,b,t;cin>>a>>b>>t;
		nex[a][0][b%k]=min(t,nex[a][0][b%k]);
	}
	for(int i=1;i<16;i++){
		for(int x=0;x<n;x++){
			for(int a=0;a<k;a++){
				for(int b=0;b<k;b++){
					if(nex[x][i-1][a]==sonsuz)break;
					int y=((x/k)+pie(i-1))*k+a;
					if(y>=n)break;
					if(nex[y][i-1][b]==sonsuz)continue;
					nex[x][i][b]=min(nex[x][i][b],nex[x][i-1][a]+nex[y][i-1][b]);
				}
			}
		}
	}
	while(q--){
		int yunuy,suayp;cin>>yunuy>>suayp;
		int pos=yunuy/k,tar=suayp/k;
		int ans[k];for(int &x:ans)x=sonsuz;
		ans[yunuy%k]=0;
		for(int i=0;i<16;i++){
			if((tar-pos)&pie(i)){
				int yeni[k];for(int &x:yeni)x=sonsuz;
				for(int a=0;a<k;a++){
					if(ans[a]==sonsuz)continue;
					for(int b=0;b<k;b++){
						if(nex[pos*k+a][i][b]==sonsuz)continue;
						yeni[b]=min(yeni[b],ans[a]+nex[pos*k+a][i][b]);
					}
				}
				for(int j=0;j<k;j++){
					ans[j]=yeni[j];
				}
				pos+=pie(i);
			}
		}
		if(ans[suayp%k]==sonsuz){
			cout<<-1;
		}
		else cout<<ans[suayp%k];
		cout<<endl;
	}
}

• Subtask 1: 7 / 7
• Subtask 2: 10 / 10
• Subtask 3: 8 / 8
• Subtask 4: 31 / 31
• Subtask 5: 44 / 44