Submission #1087267

#	Time	Username	Problem	Language	Result	Execution time	Memory
1087267		PieArmy	Toll (BOI17_toll)	C++17	100 / 100	65 ms	19288 KiB

toll

typedef long long ll;
ll pie(ll army){return (1ll<<army);}
#include <bits/stdc++.h>
#define fr first
#define sc second
#define pb push_back
#define endl '\n'
#define mid ((left+right)>>1)
const ll inf=2000000000000000005;
const int sonsuz=1000000005;
using namespace std;
ll fpow(ll x,ll y,ll m=0){if(y<0){cout<<"powError";return -1;}if(m)x%=m;ll res=1;while(y>0){if(y&1)res*=x;x*=x;if(m){x%=m;res%=m;}y>>=1;}return res;}

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

void code(){
	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++){
					int y=((x/k)+pie(i-1))*k+a;
					if(y>=n)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;
	}
}

int main(){
	ios_base::sync_with_stdio(false);cin.tie(NULL);
	bool usaco=0;if(usaco){freopen(".in","r",stdin);freopen(".out","w",stdout);}
	int t=1;
	if(!t)cin>>t;
	while(t--){code();cout<<endl;}
	return 0;
}

Compilation message (stderr)

toll.cpp: In function 'int main()':
toll.cpp:72:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |  bool usaco=0;if(usaco){freopen(".in","r",stdin);freopen(".out","w",stdout);}
      |                         ~~~~~~~^~~~~~~~~~~~~~~~~
toll.cpp:72:57: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |  bool usaco=0;if(usaco){freopen(".in","r",stdin);freopen(".out","w",stdout);}
      |                                                  ~~~~~~~^~~~~~~~~~~~~~~~~~~

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