結果
問題 | No.875 Range Mindex Query |
ユーザー |
|
提出日時 | 2019-09-08 00:12:43 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 66 ms / 2,000 ms |
コード長 | 2,132 bytes |
コンパイル時間 | 1,839 ms |
コンパイル使用メモリ | 194,696 KB |
最終ジャッジ日時 | 2025-01-07 17:22:36 |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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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:60:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 60 | scanf("%d%d", &N, &Q); | ~~~~~^~~~~~~~~~~~~~~~ main.cpp:64:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 64 | scanf("%d", &a); | ~~~~~^~~~~~~~~~ main.cpp:70:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 70 | scanf("%d%d%d", &t, &l, &r); | ~~~~~^~~~~~~~~~~~~~~~~~~~~~
ソースコード
#include <bits/stdc++.h>using namespace std;template<typename Tp>class segtree{Tp *tree;Tp (*operation)(const Tp&, const Tp&);Tp ident;size_t len, depth;public:segtree(size_t n, Tp (*op)(const Tp&, const Tp&), Tp id): operation(op), ident(id){for(depth=1;(1ULL<<depth)<n;++depth);len = 1ULL<<depth;++depth;tree = new Tp[2*len];for(size_t i=0;i<2*len;++i) tree[i] = id;}~segtree(){delete[] tree;}void update(size_t pos, Tp val){tree[len+pos] = val;for(size_t p=(len+pos)>>1;p>0;p>>=1){tree[p] = operation(tree[2*p], tree[2*p+1]);}}void add(size_t pos, Tp val){tree[len+pos] += val;for(size_t p=(len+pos)>>1;p>0;p>>=1){tree[p] = operation(tree[2*p], tree[2*p+1]);}}Tp queue(size_t left, size_t right){Tp lval = ident, rval = ident;left += len;right += len;while(true){if(left >= right) return operation(lval, rval);if(right - left == 1) return operation(lval, operation(tree[left], rval));if(left & 1) lval = operation(lval, tree[left++]);left >>= 1;if(right & 1) rval = operation(tree[right-1], rval);right >>= 1;}}Tp &operator[](size_t pos){return tree[len+pos];}void refresh(){for(size_t p=len-1;p>0;--p){tree[p] = operation(tree[2*p], tree[2*p+1]);}}};int main(){int N, Q;int a, t, l, r;scanf("%d%d", &N, &Q);segtree<pair<int,int>> st(N, [](auto x, auto y){ return min(x, y); }, {N+1, -1});for(int i=0;i<N;++i){scanf("%d", &a);st[i] = {a, i+1};}st.refresh();for(int i=0;i<Q;++i){scanf("%d%d%d", &t, &l, &r);if(t==1){int tmp = st[l-1].first;st.update(l-1, {st[r-1].first, st[l-1].second});st.update(r-1, {tmp, st[r-1].second});}else printf("%d\n", st.queue(l-1, r).second);}return 0;}