답안 #116958

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
116958 2019-06-14T08:56:36 Z pzdba 통행료 (IOI18_highway) C++14
6 / 100
203 ms 24600 KB
#include <bits/stdc++.h>
#include "highway.h"
using namespace std;
typedef long long LL;
typedef pair<int, int> pii;
vector<pii> g[90005];
int depth[90005], par[90005];
vector<int> ud[90005];

void dfs(int u, int p, int j, int d){
    depth[u] = d;
    par[u] = j;
    ud[d].push_back(u);
    for(int i=0;i<g[u].size();i++){
        int v = g[u][i].first, j = g[u][i].second;
        if(v == p) continue;
        dfs(v, u, j, d+1);
    }
}
void find_pair(int n, std::vector<int> u, std::vector<int> v, int a, int b){
    int m = u.size();
    for(int i=0;i<m;i++){
        int a = u[i], b = v[i];
        g[a].push_back(pii(b, i));
        g[b].push_back(pii(a, i));
    }
    dfs(0, -1, 0, 0);
    vector<int> w;
    w.resize(m);
    LL base = ask(w);
    int lo = 1, hi = n, dd = 0, s = 0, t = 0;
    while(lo <= hi){
        int mid = (lo+hi)/2;
        for(int i=0;i<m;i++) w[i] = 0;
        for(int j=mid;j<=n;j++){
            for(int k=0;k<ud[j].size();j++){
                int u = ud[j][k];
                w[par[u]] = 1;
            }
        }
        LL tmp = ask(w);
        if(tmp > base) lo = mid+1, dd = mid;
        else hi = mid-1;
    }
    lo = 0, hi = ud[dd].size()-1;
    while(lo <= hi){
        int mid = (lo+hi)/2;
        for(int i=0;i<m;i++) w[i] = 0;
        for(int j=0;j<=mid;j++){
            int u = ud[dd][j];
            w[par[u]] = 1;
        }
        LL tmp = ask(w);
        if(tmp > base) hi = mid-1, s = ud[dd][mid];
        else lo = mid+1;
    }
    for(int i=0;i<=n;i++) ud[i].clear();
    dfs(s, -1, 0, 0);
    lo = 1, hi = n;
    while(lo <= hi){
        int mid = (lo+hi)/2;
        for(int i=0;i<m;i++) w[i] = 0;
        for(int j=mid;j<=n;j++){
            for(int k=0;k<ud[j].size();j++){
                int u = ud[j][k];
                w[par[u]] = 1;
            }
        }
        LL tmp = ask(w);
        if(tmp > base) lo = mid+1, dd = mid;
        else hi = mid-1;
    }
    lo = 0, hi = ud[dd].size()-1;
    while(lo <= hi){
        int mid = (lo+hi)/2;
        for(int i=0;i<m;i++) w[i] = 0;
        for(int j=0;j<=mid;j++){
            int u = ud[dd][j];
            w[par[u]] = 1;
        }
        LL tmp = ask(w);
        if(tmp > base) hi = mid-1, t = ud[dd][mid];
        else lo = mid+1;
    }
    answer(s, t);
}

Compilation message

highway.cpp: In function 'void dfs(int, int, int, int)':
highway.cpp:14:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<g[u].size();i++){
                 ~^~~~~~~~~~~~
highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:36:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int k=0;k<ud[j].size();j++){
                         ~^~~~~~~~~~~~~
highway.cpp:64:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int k=0;k<ud[j].size();j++){
                         ~^~~~~~~~~~~~~
# 결과 실행 시간 메모리 Grader output
1 Incorrect 6 ms 4600 KB Output is incorrect: {s, t} is wrong.
2 Halted 0 ms 0 KB -
# 결과 실행 시간 메모리 Grader output
1 Incorrect 7 ms 4600 KB Output is incorrect: {s, t} is wrong.
2 Halted 0 ms 0 KB -
# 결과 실행 시간 메모리 Grader output
1 Correct 40 ms 5912 KB Output is correct
2 Correct 54 ms 7292 KB Output is correct
3 Correct 65 ms 8656 KB Output is correct
4 Correct 202 ms 16976 KB Output is correct
5 Correct 173 ms 16888 KB Output is correct
6 Correct 160 ms 16968 KB Output is correct
7 Correct 181 ms 16892 KB Output is correct
8 Correct 203 ms 16880 KB Output is correct
9 Correct 193 ms 16880 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Incorrect 6 ms 4600 KB Output is incorrect: {s, t} is wrong.
2 Halted 0 ms 0 KB -
# 결과 실행 시간 메모리 Grader output
1 Runtime error 57 ms 24588 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -
# 결과 실행 시간 메모리 Grader output
1 Runtime error 51 ms 24600 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -