#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define S second
//#define F first
#define all(x) (x).begin(),(x).end()
#define sz size()
#define Yes cout << "YES" << endl
#define No cout << "NO" << endl
#define pb(x) push_back(x);
#define endl '\n'
#define fast ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
const int N=3e5+7;
ll INF=INT_MAX,mod=1e9+7;
int TT=1;
ll power(ll x, unsigned int y)
{
ll res = 1;
x = x; // % mod;
if (x == 0) return 0;
while (y > 0)
{
if (y & 1) res = (res*x) ; // % mod;
y = y>>1;
x = (x*x) ; // % mod;
}
return res;
}
ll n , m , q;
pair<ll,ll> p[N];
pair<ll,ll> a[N];
vector<vector<ll> > qe(N,vector<ll> (3));
ll ans[N];
ll siz[N];
ll cycles = 0;
vector<vector<ll>> roll;
ll sqr = 4;
bool cmp(vector<ll> x, vector<ll> y)
{
if(x[0]/sqr==y[0]/sqr) return x[1] < y[1];
return x[0]<y[0];
}
pair<ll,ll> get(ll x)
{
if(p[x].first==x) return {x,0};
pair<ll,ll> ho = get(p[x].first);
return {ho.first, p[x].second^ho.second};
}
void nonmerge(vector<ll> v)
{
ll x= v[0] , y = v[1] , b = v[2];
if(b)
{
siz[y] -= siz[x];
p[x] = {x,0};
return;
}
else
{
pair<ll,ll> paix = get(x);
pair<ll,ll> paiy = get(y);
if(paix.second==paiy.second) cycles--;
}
}
void merg(ll x, ll y)
{
pair<ll,ll> paix = get(x);
pair<ll,ll> paiy = get(y);
if(paix.first==paiy.first)
{
if(paix.second==paiy.second) cycles++;
roll.push_back({x,y,0});
}
else
{
ll xx = paix.first , yy = paiy.first;
if(siz[xx]<siz[yy])
{
p[xx] = {yy,(paix.second==paiy.second)};
roll.push_back({xx,yy,1});
}
else
{
p[yy] = {xx,(paix.second==paiy.second)};
roll.push_back({yy,xx,1});
}
}
}
void solve()
{
cin >> n >> m >> q;
sqr = max(2LL,m/int(sqrt(q)));
for(int i = 1; i <= n; i++) p[i] = {i,0};
for(int i = 1; i <= m; i++) cin >> a[i].first >> a[i].second;
for(int i = 1; i <= q; i++)
{
cin >> qe[i][0] >> qe[i][1];
qe[i][2] = i;
}
sort(qe.begin()+1,qe.begin()+q+1,cmp);
ll st = 0, en = m+1;
for(int i = 1; i <= q; i++)
{
ll l = qe[i][0] , r = qe[i][1];
while(roll.sz&&st>0)
{
//
nonmerge(roll.back());
roll.pop_back();
st--;
}
while(roll.sz&&en<=r)
{
//
nonmerge(roll.back());
roll.pop_back();
en++;
}
while(en>r+1)
{
en--;
merg(a[en].first,a[en].second);
// mege en
}
while(st<l-1)
{
st++;
merg(a[st].first,a[st].second);
// cout << cycles << endl;
// merge st;
}
//cout << endl;
//for(int i = 1; i <= n; i++) cout << p[i].first << " " << p[i].second << endl;
//cout << l << " " << r << ": " << st << " " << en<< " " << cycles << endl;
ans[qe[i][2]] = bool(cycles);
}
for(int i = 1; i <= q; i++)
{
if(ans[i]) Yes; else No;
}
}
int main(){
//freopen("friday.in","r",stdin);
//freopen("friday.out","w",stdout);
fast;
//cin >> TT;
while(TT--)
solve();
return 0;
}
Compilation message
Joker.cpp:95:2: error: extended character is not valid in an identifier
95 | sqr = max(2LL,m/int(sqrt(q)));
| ^
Joker.cpp:95:5: error: extended character is not valid in an identifier
95 | sqr = max(2LL,m/int(sqrt(q)));
| ^
Joker.cpp:96:2: error: extended character is not valid in an identifier
96 | for(int i = 1; i <= n; i++) p[i] = {i,0};
| ^
Joker.cpp:96:5: error: extended character is not valid in an identifier
96 | for(int i = 1; i <= n; i++) p[i] = {i,0};
| ^
Joker.cpp: In function 'void solve()':
Joker.cpp:95:2: error: '\U000000a0' was not declared in this scope
95 | sqr = max(2LL,m/int(sqrt(q)));
| ^
Joker.cpp:96:4: error: expected ';' before '\U000000a0for'
96 | for(int i = 1; i <= n; i++) p[i] = {i,0};
| ^~~~~
| ;
Joker.cpp:96:22: error: 'i' was not declared in this scope
96 | for(int i = 1; i <= n; i++) p[i] = {i,0};
| ^
