oj.uz

답안 #603465

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
603465 2022-07-24T07:22:32 Z 조영욱(#8429) Collapse (JOI18_collapse) C++17
30 / 100
 161 ms 31024 KB 
#include "collapse.h"
#include <bits/stdc++.h>
using namespace std;

int sp;
typedef pair<int,int> P;
typedef pair<P,int> Pi;
set<Pi> s;
int n,c,q;
const int sz=131072;
vector<int> query[sz];
vector<int> ret;
int p[100000];
vector<P> seg[sz*2];
stack<P> st;

int find(int a) {
    return p[a]<0?a:find(p[a]);
}

bool merge(int a,int b) {
    a=find(a);
    b=find(b);
    if (a==b) {
        return false;
    }
    if (-p[a]<=-p[b]) {
        swap(a,b);
    }
    if (p[a]==p[b]) {
        st.push(P(a,p[a]));
        p[a]=p[a]-1;
    }
    st.push(P(b,p[b]));
    p[b]=a;
    return true;
}

void ins(int l,int r,P e,int node=1,int nodel=0,int noder=sz-1) {
    if (r<nodel||l>noder) {
        return;
    }
    if (l<=nodel&&noder<=r) {
        seg[node].push_back(e);
        return;
    }
    int mid=(nodel+noder)/2;
    ins(l,r,e,node*2,nodel,mid);
    ins(l,r,e,node*2+1,mid+1,noder);
}

void dfs(int node,int val) {
    int now=val;
    int got=st.size();
    //printf("%d\n",node);
    for(int i=0;i<seg[node].size();i++) {
        //printf("%d\n",node);
        //printf("%d %d\n",seg[node][i].first,seg[node][i].second);
        if (merge(seg[node][i].first,seg[node][i].second)) {
            now--;
        }
    }
    if (node>=sz) {
        for(int i=0;i<query[node-sz].size();i++) {
            int ind=query[node-sz][i];
            ret[ind]=now;
        }
        while (got<st.size()) {
            assert(st.top().first>=0);
            assert(st.top().first<n);
            p[st.top().first]=st.top().second;
            st.pop();
        }
        return;
    }
    dfs(node*2,now);
    dfs(node*2+1,now);
    while (got<st.size()) {
        assert(st.top().first>=0);
        assert(st.top().first<n);
        p[st.top().first]=st.top().second;
        st.pop();
    }
}

std::vector<int> simulateCollapse(
	int N,
	std::vector<int> T,
	std::vector<int> X,
	std::vector<int> Y,
	std::vector<int> W,
	std::vector<int> pp
) {
    //st.push(P(-1,-1));
    sp=pp[0];
    n=N;
    c=T.size();
    q=pp.size();
    ret.resize(q);
    memset(p,-1,sizeof(p));
    for(int i=0;i<c;i++) {
        if (X[i]>Y[i]) {
            swap(X[i],Y[i]);
        }
        if (X[i]<=sp&&Y[i]>sp) {
            continue;
        }
        else {

        }
        if (T[i]==0) {
            s.insert(Pi(P(X[i],Y[i]),i));
        }
        else {
            auto iter=s.lower_bound(Pi(P(X[i],Y[i]),-1));
            int got=(*iter).second;
            s.erase(iter);
            ins(got,i-1,P(X[i],Y[i]));
        }
    }
    for(auto now:s) {
        //printf(".%d %d\n",now.second,c-1);
        ins(now.second,c-1,now.first);
    }
    for(int i=0;i<q;i++) {
        query[W[i]].push_back(i);
    }
    dfs(1,n);
	return ret;
}

Compilation message

collapse.cpp: In function 'void dfs(int, int)':
collapse.cpp:56:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |     for(int i=0;i<seg[node].size();i++) {
      |                 ~^~~~~~~~~~~~~~~~~
collapse.cpp:64:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |         for(int i=0;i<query[node-sz].size();i++) {
      |                     ~^~~~~~~~~~~~~~~~~~~~~~
collapse.cpp:68:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::stack<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |         while (got<st.size()) {
      |                ~~~^~~~~~~~~~
collapse.cpp:78:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::stack<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   78 |     while (got<st.size()) {
      |            ~~~^~~~~~~~~~

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 10324 KB Output is correct
2 Incorrect 8 ms 10064 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 30 ms 12804 KB Output is correct
2 Correct 32 ms 12896 KB Output is correct
3 Correct 86 ms 20060 KB Output is correct
4 Correct 30 ms 13480 KB Output is correct
5 Correct 117 ms 22656 KB Output is correct
6 Correct 36 ms 14568 KB Output is correct
7 Correct 154 ms 30900 KB Output is correct
8 Correct 109 ms 23360 KB Output is correct
9 Correct 36 ms 13508 KB Output is correct
10 Correct 32 ms 13508 KB Output is correct
11 Correct 45 ms 14156 KB Output is correct
12 Correct 122 ms 24156 KB Output is correct
13 Correct 137 ms 27720 KB Output is correct
14 Correct 159 ms 31024 KB Output is correct
15 Correct 161 ms 29916 KB Output is correct

Subtask #3
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 12804 KB Output is correct
2 Incorrect 29 ms 12756 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 10324 KB Output is correct
2 Incorrect 8 ms 10064 KB Output isn't correct
3 Halted 0 ms 0 KB -