#include <bits/stdc++.h>
using namespace std;
#define fileio() freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout)
#define fastio() cin.tie(0), ios_base::sync_with_stdio(0)
#define sp " "
//#define endl "\n"
#define pii pair<int, int>
#define st first
#define nd second
#define pb push_back
#define N 500005
#define M 500005
#define L(node) node * 2
#define R(node) node * 2 + 1
const int INF = 1e9 + 7;
int lazy[4 * N];
pii tree[4 * N];
void push(int node, int l, int r){
tree[node].st += lazy[node];
if (l != r){
lazy[L(node)] += lazy[node];
lazy[R(node)] += lazy[node];
}
lazy[node] = 0;
}
pii merge(pii a, pii b){
if (a.st == b.st) return {a.st, a.nd + b.nd};
return min(a, b);
}
void update(int node, int l, int r, int sl, int sr, int val){
push(node, l, r);
if (l > sr || r < sl) return;
if (l >= sl && r <= sr){
lazy[node] += val;
push(node, l, r);
return;
}
int mid = (l + r) / 2;
update(L(node), l, mid, sl, sr, val);
update(R(node), mid + 1, r, sl, sr, val);
tree[node] = merge(tree[L(node)], tree[R(node)]);
}
void build(int node, int l, int r){
tree[node] = {0, r - l + 1};
if (l == r) return;
int mid = (l + r) / 2;
build(L(node), l, mid);
build(R(node), mid + 1, r);
}
pii query(int node, int l, int r, int sl, int sr){
push(node, l, r);
if (l > sr || r < sl) return {INF, 0};
if (l >= sl && r <= sr) return tree[node];
int mid = (l + r) / 2;
return merge(query(L(node), l, mid, sl, sr), query(R(node), mid + 1, r, sl, sr));
}
int32_t main(){
fileio();
fastio();
int n, m, q;
cin>>n>>m>>q;
build(1, 1, n);
vector<int> l(m + 5, 0), r(m + 5, 0), ans(q + 5, 0);
vector<vector<int>> ex(n + 5);
vector<vector<pii>> todo(n + 5);
for (int i = 1; i <= m; i++){
cin>>l[i]>>r[i];
ex[r[i]].pb(l[i]);
}
for (int i = 1; i <= q; i++){
int s, e;
cin>>s>>e;
todo[e].pb({s, i});
}
for (int i = 1; i <= n; i++){
for (auto j : ex[i]){
update(1, 1, n, j, i, 1);
}
for (auto j : todo[i]){
if (query(1, 1, n, j.st, i).st != 0) ans[j.nd] = 1;
}
}
for (int i = 1; i <= q; i++) {
if (ans[i]) cout<<"YES\n";
else cout<<"NO\n";
}
cerr<<"time taken : "<<(float)clock() / CLOCKS_PER_SEC<<" seconds\n";
}
Compilation message
curtains.cpp: In function 'int32_t main()':
curtains.cpp:3:25: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
3 | #define fileio() freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout)
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
curtains.cpp:67:2: note: in expansion of macro 'fileio'
67 | fileio();
| ^~~~~~
curtains.cpp:3:59: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
3 | #define fileio() freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout)
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
curtains.cpp:67:2: note: in expansion of macro 'fileio'
67 | fileio();
| ^~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
9 ms |
17244 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
9 ms |
17244 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
9 ms |
17244 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
9 ms |
17244 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
9 ms |
17244 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
9 ms |
17244 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
