제출 #171423

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
171423	2019-12-28 16:08:48	dolphingarlic	Synchronization (JOI13_synchronization)	C++14	100 / 100	987 ms	23936 KiB

synchronization

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#include <bits/stdc++.h>
#define FOR(i,x,y)for(int i = x; i < y; i++)
#define x first
#define y second
using namespace std;
const int N = 200001;
vector<int> g[N];
pair<int,int> e[N];
int n,m,q,f[N],l[N],t = 1,tin[N],tout[N],c[N][20],b[N];
void dfs(int v = 1,int p = 0){
    c[v][0] = p;
    FOR(i,1,20)c[v][i] = c[c[v][i - 1]][i - 1];
    f[v] = 1;
    tin[v] = t++;
    for(int i : g[v])if(i != p)dfs(i,v);
    tout[v] = t;
}
void up(int p,int val){ for(; p <= n; p +=(p &(-p)))b[p] += val; }
int qu(int p){
    int ans = 0;
    for(; p; p -=(p &(-p)))ans += b[p];
    return ans;
}
int lca(int v){
    int ll = v;
    for(int i = 19; ~i; i--)if(c[ll][i] && qu(tin[c[ll][i]])== qu(tin[v]))ll = c[ll][i];
    return ll;
}
main(){
    cin >> n >> m >> q;
 
 
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컴파일 시 표준 에러 (stderr) 메시지

synchronization.cpp:29:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 10 / 10
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• Subtask 5: 40 / 40