이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
#define pb emplace_back
#define ll long long
#define fi first
#define se second
#define mp make_pair
//#define int int64_t
using namespace std;
const int N = int(1e6) + 7;
const int M = N << 2;
const int inf = 2e9 + 1;
typedef pair<int, int> pii;
int l[N], h[N], st[N];
int a[N], n, m, ans[N];
vector<pair<int, pii>> ask[N];
void build(int x, int low, int high) {
l[x] = low, h[x] = high;
if(l[x] == h[x]) return;
int mid = (low + high) >> 1;
build(x << 1, low, mid);
build(x << 1 | 1, mid + 1, high);
}
void upd(int x, int pos, int val) {
if(l[x] > pos || h[x] < pos) return;
if(l[x] == h[x]) {
st[x] = max(st[x], val);
return;
}
upd(x << 1, pos, val);
upd(x << 1 | 1, pos, val);
st[x] = max(st[x << 1], st[x << 1 | 1]);
}
int get(int x, int low, int high) {
if(l[x] > high || h[x] < low) return 0;
if(l[x] >= low && h[x] <= high) return st[x];
return max(get(x << 1, low, high), get(x << 1 | 1, low, high));
}
int32_t main() {
ios_base::sync_with_stdio(0);
cin.tie(0), cout.tie(0);
#define Task "test"
if(fopen(Task".inp", "r")) {
freopen(Task".inp", "r", stdin);
freopen(Task".out", "w", stdout);
}
cin >> n >> m;
for(int i = 1; i <= n; ++i) cin >> a[i];
for(int u, v, w, i = 1; i <= m; ++i) {
cin >> u >> v >> w;
ask[v].pb(i, pii(u, w));
}
build(1, 1, n);
vector<int> st;
for(int i = 1; i <= n; ++i) {
while(st.size() && a[st.back()] <= a[i]) st.pop_back();
if(st.size()) {
upd(1, st.back(), a[st.back()] + a[i]);
}
st.pb(i);
for(auto q: ask[i]) {
//cout << q.fi << ' ' << get(1, q.se.fi, i) << '\n';
ans[q.fi] = get(1, q.se.fi, i) <= q.se.se;
}
}
for(int i = 1; i <= m; ++i) cout << ans[i] << '\n';
}
컴파일 시 표준 에러 (stderr) 메시지
sortbooks.cpp: In function 'int32_t main()':
sortbooks.cpp:50:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
freopen(Task".inp", "r", stdin);
~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sortbooks.cpp:51:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
freopen(Task".out", "w", stdout);
~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
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