제출 #864363

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
864363		anhphant	원숭이와 사과 나무 (IZhO12_apple)	C++14	0 / 100	318 ms	262144 KiB

apple

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define endl '\n'

ll M;

struct DYNAMIC_SEGMENT_TREE {
     struct Node {
        ll L, R, sum, lazy, ls, rs;
     };
     vector<Node> ST;

     DYNAMIC_SEGMENT_TREE() {
        ST = {{1, ll(1e9), 0, 0, -1, -1}};
     }

     void f(ll id) {
        ST[id].sum = ST[id].R - ST[id].L + 1;
        ST[id].lazy = 1;
     }

     void push_down(ll id) {
        ll MID = (ST[id].L + ST[id].R) / 2;
        if (ST[id].ls == -1) {
            ST[id].ls = ST.size();
            ST.push_back({ST[id].L, MID, 0, 0, -1, -1});
        }
        if (ST[id].rs == -1) {
            ST[id].rs = ST.size();
            ST.push_back({MID + 1, ST[id].R, 0, 0, -1, -1});
        }

        if (ST[id].lazy == 0) return;
        f(ST[id].ls);
        f(ST[id].rs);
        ST[id].lazy = 0;
     }

     void push_up(ll id) {
        ll MID = (ST[id].L + ST[id].R) / 2;
        if (ST[id].ls == -1) {
            ST[id].ls = ST.size();
            ST.push_back({ST[id].L, MID, 0, 0, -1, -1});
        }
        if (ST[id].rs == -1) {
            ST[id].rs = ST.size();
            ST.push_back({MID + 1, ST[id].R, 0, 0, -1, -1});
        }
        ST[id].sum = ST[ST[id].ls].sum + ST[ST[id].rs].sum;
     }

     void update(ll id, ll L, ll R) {
        push_down(id);
        if (ST[id].R < L || R < ST[id].L) return;
        //cerr << "update : " << id << " " << ST[id].L << " " << ST[id].R << endl;
        if (L <= ST[id].L && ST[id].R <= R) {
            f(id);
            push_down(id);
            return;
        }

        ll MID = (ST[id].L + ST[id].R) / 2;
        if (ST[id].ls == -1) {
            ST[id].ls = ST.size();
            ST.push_back({ST[id].L, MID, 0, 0, -1, -1});
        }
        if (ST[id].rs == -1) {
            ST[id].rs = ST.size();
            ST.push_back({MID + 1, ST[id].R, 0, 0, -1, -1});
        }

        update(ST[id].ls, L, R);
        update(ST[id].rs, L, R);
        push_down(ST[id].ls);
        push_down(ST[id].rs);
        push_up(id);
     }

     ll getans(ll id, ll L, ll R) {
        push_down(id);
        if (ST[id].R < L || R < ST[id].L) return 0;
        if (L <= ST[id].L && ST[id].R <= R) return ST[id].sum;
        push_down(id);
        return getans(ST[id].ls, L, R) + getans(ST[id].rs, L, R);
     }

     void debug() {
        for(int i = 0; i < ST.size(); ++i) {
            cerr << "i = " << i << " : " << ST[i].L << " " << ST[i].R << " " << ST[i].sum << " "
                << ST[i].lazy << " " << ST[i].ls << " " << ST[i].rs << endl;
        }
     }
};

int main() {
    ios_base :: sync_with_stdio(0);
    cin.tie(0); cout.tie(0); cerr.tie(0);
    if (fopen("FILE.INP", "r")) {
        freopen("FILE.INP", "r", stdin);
        freopen("FILE.OUT", "w", stdout);
    }

    cin >> M;
    DYNAMIC_SEGMENT_TREE St;

    ll C = 0;
    for(int _ = 1; _ <= M; ++_) {
        ll D, L, R;
        cin >> D >> L >> R;
        if (D == 2) {
            St.update(0, L + C, R + C);
        }
        else {
            C = St.getans(0, L + C, R + C);
            cout << C << endl;
        }
        //cerr << "query " << _ << endl;
        //St.debug();
        //cerr << endl;
    }
}

컴파일 시 표준 에러 (stderr) 메시지

apple.cpp: In member function 'void DYNAMIC_SEGMENT_TREE::debug()':
apple.cpp:89:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<DYNAMIC_SEGMENT_TREE::Node>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |         for(int i = 0; i < ST.size(); ++i) {
      |                        ~~^~~~~~~~~~~
apple.cpp: In function 'int main()':
apple.cpp:100:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  100 |         freopen("FILE.INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
apple.cpp:101:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  101 |         freopen("FILE.OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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