oj.uz

답안 #43217

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
43217 2018-03-10T23:57:32 Z smu201111192 버스 (JOI14_bus) C++14
35 / 100
 1000 ms 110428 KB 
#include <iostream>
#include <cstdio>
#include <cassert>
#include <bitset>
#include <string>
#include <sstream>
#include <algorithm>
#include <set>
#include <numeric>
#include <cmath>
#include <map>
#include <vector>
#include <queue>
#include <stack>
#include <cstring>
#include <queue>
#include <numeric>
#include <iomanip>
#define ll long long
using namespace std;
const int MAXN = 100005;
const int MAXV = 1000005;
int n,m,id = 0;
map<pair<int,int>,int> dict;
pair<int,int> cv[MAXV];
vector<int> adj[MAXV];
vector<int> node[MAXV];
struct edge{
    int u,v,st,ed;
    void read(){
        cin>>u>>v>>st>>ed;
    }
}e[MAXV];
int dp[MAXV];
void addEdge(int u,int v){
    adj[v].push_back(u);
}
//n에 도착할 수 있는 가장 늦은 시점을 구하자.
int main(){
    //freopen("/Users/gangseong-yong/Downloads/2014-sp-d1-data/bus/in/04-15.txt","r",stdin);
    ios::sync_with_stdio(false); cin.tie(0);
    cin >> n >> m;
    for(int i = 1; i <= m; i++){
        //e[i].read();
        cin >> e[i].u >> e[i].v >> e[i].st >> e[i].ed;
        dict[{e[i].u,e[i].st}];
        dict[{e[i].v,e[i].ed}];
        node[e[i].u].push_back(e[i].st);
        node[e[i].v].push_back(e[i].ed);
    }
    for(int i = 1; i <= n; i++) {
        sort(node[i].begin(),node[i].end());
        node[i].erase(unique(node[i].begin(),node[i].end()),node[i].end());
    }
    vector<pair<int,int> > ord;
    for(auto it = dict.begin(); it!= dict.end(); it++){
        it->second = ++id;
        cv[id] = it->first;
        ord.push_back({it->first.second,id});
    }
    for(int i = 1; i <= n; i++){
        for(int j = 0; j < (int)node[i].size() - 1; j++){
            int tu = node[i][j];
            int tv = node[i][j+1];
            addEdge(dict[make_pair(i,tu)],dict[make_pair(i,tv)]);
        }
    }
    for(int i = 1; i <= m; i++){
        int u = e[i].u; int v = e[i].v;
        int st = e[i].st; int ed = e[i].ed;
        addEdge(dict[{u,st}],dict[{v,ed}]);
    }
    sort(ord.begin(),ord.end());
    reverse(ord.begin(),ord.end());
    memset(dp,0x3f3f3f3f,sizeof(dp));
    
    for(int i = 0; i<ord.size();i++){
        int x = ord[i].second;
        int tm = ord[i].first;
        int pv = cv[x].first;
        if(pv == n)
            dp[x] = tm;
        for(auto y:adj[x])
            dp[y] = min(dp[y],dp[x]);
    }
    
    int Q; cin>> Q;
    for(int i = 1; i <= Q; i++){
        int tm; cin >> tm;
        if(node[1].size() == 0) {
            cout<<-1; continue;
        }
        int lo = 0; int hi = node[1].size() - 1;
        int ret = -1;
        while(lo <= hi){
            int mid = (lo + hi)/2;
            int t = node[1][mid];
            //요시간에 출발하면 언제 도착혀?
            int v = dict[{1,t}];
            if(dp[v] <= tm){
                ret = max(ret,t);
                lo = mid + 1;
            }
            else hi = mid - 1;
        }
        cout<<ret<<"\n";
    }
    
    return 0;
}

Compilation message

bus.cpp: In function 'int main()':
bus.cpp:77:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i<ord.size();i++){
                     ^

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 45 ms 51320 KB Output is correct
2 Correct 45 ms 51424 KB Output is correct
3 Correct 45 ms 51424 KB Output is correct
4 Correct 48 ms 51512 KB Output is correct
5 Correct 48 ms 51512 KB Output is correct
6 Correct 45 ms 51512 KB Output is correct
7 Correct 46 ms 51512 KB Output is correct
8 Correct 44 ms 51620 KB Output is correct
9 Correct 44 ms 51620 KB Output is correct
10 Correct 47 ms 51620 KB Output is correct
11 Correct 49 ms 52076 KB Output is correct
12 Correct 49 ms 52076 KB Output is correct
13 Correct 47 ms 52112 KB Output is correct
14 Correct 49 ms 52204 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 45 ms 52204 KB Output is correct
2 Correct 83 ms 52464 KB Output is correct
3 Correct 79 ms 52464 KB Output is correct
4 Correct 50 ms 52464 KB Output is correct
5 Correct 50 ms 52464 KB Output is correct
6 Correct 46 ms 52464 KB Output is correct
7 Correct 77 ms 52464 KB Output is correct
8 Correct 49 ms 52464 KB Output is correct
9 Correct 63 ms 52464 KB Output is correct
10 Correct 94 ms 52708 KB Output is correct
11 Correct 70 ms 52708 KB Output is correct
12 Correct 137 ms 52880 KB Output is correct

Subtask #3
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1061 ms 104648 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1081 ms 110428 KB Time limit exceeded
2 Halted 0 ms 0 KB -