結果
| 問題 | No.875 Range Mindex Query |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-02-06 14:20:17 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.89.0) |
| 結果 |
AC
|
| 実行時間 | 237 ms / 2,000 ms |
| コード長 | 2,745 bytes |
| 記録 | |
| コンパイル時間 | 2,033 ms |
| コンパイル使用メモリ | 199,428 KB |
| 最終ジャッジ日時 | 2025-01-08 22:30:40 |
|
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | AC * 18 |
コンパイルメッセージ
main.cpp: In function ‘int main()’:
main.cpp:90:18: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
90 | int N, Q; scanf("%d %d", &N, &Q);
| ~~~~~^~~~~~~~~~~~~~~~~
main.cpp:96:17: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
96 | int x; scanf("%d", &x);
| ~~~~~^~~~~~~~~~
main.cpp:105:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
105 | int l, r; scanf("%d %d", &l, &r);
| ~~~~~^~~~~~~~~~~~~~~~~
main.cpp:117:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
117 | int l, r; scanf("%d %d", &l, &r);
| ~~~~~^~~~~~~~~~~~~~~~~
ソースコード
#include <bits/stdc++.h>
template <typename Monoid>
class SegmentTree{
protected:
const int depth, size, hsize;
std::vector<Monoid> data;
public:
SegmentTree(int n):
depth(n > 1 ? 32-__builtin_clz(n-1) + 1 : 1),
size((1 << depth) - 1),
hsize(size / 2 + 1),
data(size + 1, Monoid::id())
{}
inline auto operator[](int i) const {return at(i);}
inline auto at(int i) const {return data[hsize + i];}
inline auto get(int x, int y) const { // [x,y)
int l = x + hsize, r = y + hsize;
Monoid ret = Monoid::id();
while(l < r){ // must be commutative
if(r & 1) ret = ret + data[--r];
if(l & 1) ret = ret + data[l++];
l >>= 1, r >>= 1;
}
return ret;
}
inline void update(int i, const Monoid &x){
i += hsize;
data[i] = x;
while(i > 1) i >>= 1, data[i] = data[i << 1 | 0] + data[i << 1 | 1];
}
template <typename T>
inline void init_with_vector(const std::vector<T> &val){
data.assign(size + 1, Monoid::id());
for(int i = 0; i < (int)val.size(); ++i) data[hsize + i] = val[i];
for(int i = hsize-1; i >= 1; --i) data[i] = data[i << 1 | 0] + data[i << 1 | 1];
}
template <typename T>
inline void init(const T &val){
init_with_vector(std::vector<Monoid>(hsize, val));
}
auto debug(){
return data;
}
};
template <typename T> struct MinMonoid{
using value_type = T;
T value;
static T INF;
MinMonoid(): value(){}
MinMonoid(T value): value(value){}
constexpr inline static MinMonoid id(){
return INF;
}
friend inline MinMonoid operator+(const MinMonoid &a, const MinMonoid &b){
return std::min(a.value, b.value);
}
friend std::ostream& operator<<(std::ostream &s, const MinMonoid &a){
s << a.value;
return s;
}
};
using Mon = MinMonoid<std::pair<int, int>>;
template <> std::pair<int, int> MinMonoid<std::pair<int, int>>::INF = std::make_pair(std::numeric_limits<int>::max(), std::numeric_limits<int>::max());
int get_int(){
int ret; std::cin >> ret;
return ret;
}
int main(){
int N, Q; scanf("%d %d", &N, &Q);
SegmentTree<Mon> seg(N);
std::vector<Mon> a(N);
for(int i = 0; i < N; ++i){
int x; scanf("%d", &x);
a[i] = Mon(std::make_pair(x, i));
}
seg.init_with_vector(a);
for(int i = 0; i < Q; ++i){
switch(get_int()){
case 1: {
int l, r; scanf("%d %d", &l, &r);
--l, --r;
auto x = seg[l].value.first;
auto y = seg[r].value.first;
seg.update(l, Mon(std::make_pair(y, l)));
seg.update(r, Mon(std::make_pair(x, r)));
break;
}
case 2: {
int l, r; scanf("%d %d", &l, &r);
--l, --r;
printf("%d\n", seg.get(l, r+1).value.second + 1);
break;
}
}
}
return 0;
}