Submission #761513

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
761513	2023-06-19T21:46:38 Z	aihay	Sky Walking (IOI19_walk)	C++14	Compilation error	0 ms	0 KB

walk

#include <bits/stdc++.h>
using namespace std;
typedef long long LL;
#define F first
#define S second
#define PB push_back
#define FR(i,a,b) for(int i=(a);i<(b);i++)
#define FOR(i,n) FR(i,0,n)
#define SZ(x) int(x.size())
const LL MAAX=1e18;
const int MOD=1e9+7;
const int MAX=1e9;

int n,m,s,g,x[100010],h[100010],l[100010],r[100010],y[100010],idxx;
LL cst[1000010];
vector<int> v[5000010];
map<pair<LL,LL>,int> mp;
pair<LL,LL> inter[5000010];
LL dijk(){
	for(int i=0;i<idxx;i++)
		cst[i]=MAAX;
	priority_queue<pair<LL,int>> pq;
	pq.push({0,mp[{x[s],0}]});
	while(pq.size()){
		LL cost=-pq.top().F;
		int idx=pq.top().S;
		pq.pop();
		if(cost>cst[idx])
			continue;
		cst[idx]=cost;
		if(idx==mp[{x[g],0}])
			break;
		for(int i=0;i<v[idx].size();i++){
			int x1=inter[idx].F,x2=inter[v[idx][i]].F;
			int y1=inter[idx].S,y2=inter[v[idx][i]].S;
			LL ncst=cost+abs(x2-x1)+abs(y2-y1);
			int nidx=v[idx][i];
			if(ncst<cst[nidx]){
				cst[nidx]=ncst;
				pq.push({-ncst,nidx});
			}
		}
	}
	if(cst[mp[{x[g],0}]]==MAAX)
		cst[mp[{x[g],0}]]=-1;
	return cst[mp[{x[g],0}]];
}
map<int,vector<int>> vec;
LL min_distance(vector<int> X,vector<int> H,vector<int> L,vector<int> R,vector<int> Y,int S,int G){
	n=X.size();
	m=L.size();
	s=S,g=G;
	for(int i=0;i<n;i++){
		x[i]=X[i];
		h[i]=H[i];
		vec[x[i]].PB(0);
	}
	mp[{x[s],0}]=idxx++;
	inter[0]={x[s],0};
	mp[{x[g],0}]=idxx++;
	inter[1]={x[g],0};
	for(int i=0;i<n;i++){
		if(mp[{x[i],0}]==0){
			mp[{x[i],0}]=idxx++;
			inter[idxx-1]={x[i],0};
		}
	}
	for(int i=0;i<m;i++){
		l[i]=L[i];
		r[i]=R[i];
		y[i]=Y[i];
		int lst=-1;
		for(int j=l[i];j<=r[i];j++){
			if(h[j]<y[i])
				continue;
			if(mp[{x[j],y[i]}]==0){
				mp[{x[j],y[i]}]=idxx++;
				inter[idxx-1]={x[j],y[i]};
			}
			if(~lst){
				v[mp[{x[lst],y[i]}]].PB(mp[{x[j],y[i]}]);
				v[mp[{x[j],y[i]}]].PB(mp[{x[lst],y[i]}]);
			}
			vec[x[j]].PB(y[i]);
			lst=j;
		}
	}
	for(int i=0;i<n;i++){
		sort(vec[x[i]].begin(),vec[x[i]].end());
		for(int j=1;j<vec[x[i]].size();j++){
			v[mp[{x[i],vec[x[i]][j]}]].PB(mp[{x[i],vec[x[i]][j-1]}]);
			v[mp[{x[i],vec[x[i]][j-1]}]].PB(mp[{x[i],vec[x[i]][j]}]);
		}
	}
	return dijk();
}
int N,M,S,G;
vector<int> X,H,L,R,Y;

int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    int tc=1;
    // cin>>tc;
    while(tc--){
		cin>>N>>M;
		for(int i=0;i<N;i++){
			int x;
			cin>>x;
			X.PB(x);
		}
		for(int i=0;i<N;i++){
			int x;
			cin>>x;
			H.PB(x);
		}
		for(int i=0;i<M;i++){
			int x;
			cin>>x;
			L.PB(x);
		}
		for(int i=0;i<M;i++){
			int x;
			cin>>x;
			R.PB(x);
		}
		for(int i=0;i<M;i++){
			int x;
			cin>>x;
			Y.PB(x);
		}
		cin>>S>>G;
		cout<<min_distance(X,H,L,R,Y,S,G);
    }
    return 0;
}

Compilation message

walk.cpp: In function 'LL dijk()':
walk.cpp:33:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |   for(int i=0;i<v[idx].size();i++){
      |               ~^~~~~~~~~~~~~~
walk.cpp: In function 'LL min_distance(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, int, int)':
walk.cpp:90:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   90 |   for(int j=1;j<vec[x[i]].size();j++){
      |               ~^~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccjuKMya.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccWKJRta.o:walk.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status