제출 #1177106

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1177106		InvMOD	Deda (COCI17_deda)	C++20	140 / 140	512 ms	4616 KiB

deda

#include <bits/stdc++.h>
using namespace std;

#define fi first
#define se second
#define gcd __gcd
#define sz(v) (int) v.size()
#define pb push_back
#define pi pair<int,int>
#define all(v) (v).begin(), (v).end()
#define compact(v) (v).erase(unique(all(v)), (v).end())
#define FOR(i, a, b) for(int i = (a); i <= (b); i++)
#define REV(i, a, b) for(int i = (a); i >= (b); i--)
#define dbg(x) "[" #x " = " << (x) << "]"
///#define int long long

using ll = long long;
using ld = long double;
using ull = unsigned long long;

template<typename T> bool ckmx(T& a, const T& b){if(a < b) return a = b, true; return false;}
template<typename T> bool ckmn(T& a, const T& b){if(a > b) return a = b, true; return false;}

const int N = 2e5+5;
const ll MOD = 1e9+7;
const ll INF = 1e18;


struct SMT{
    int trsz;
    vector<int> st;

    SMT(int n = 0): trsz(n), st((n << 2) | 1, 1e9 + 7) {}

    void update(int id, int l, int r, int x, int val){
        if(l == r){
            st[id] = val;
        }
        else{
            int m = l+r>>1;
            if(x <= m)
                update(id << 1, l, m, x, val);
            else update(id << 1|1, m+1, r, x, val);
            st[id] = min(st[id << 1], st[id << 1|1]);
        }
    }

    int query(int id, int l, int r, int u, int v){
        if(l > v || r < u) return 1e9 + 7;
        if(l >= u && r <= v) return st[id];

        int m = l+r>>1;
        return min(query(id << 1, l, m, u, v), query(id << 1|1, m+1, r, u, v));
    }

    int query(int l, int r){
        return query(1, 1, trsz, l, r);
    }

    void update(int x, int val){
        update(1, 1, trsz, x, val);
    }
};


void solve()
{
    int n,q; cin >> n >> q;

    SMT st(n);

    auto find_answer = [&](int start, int target) -> int{
        int l = start - 1, r = n + 1;
        while(l + 1 < r){
            int m = l+r>>1;
            if(st.query(start, m) <= target){
                r = m;
            }
            else l = m;
        }
        return (r == n + 1 ? -1 : r);
    };

    while(q--){
        char op; cin >> op;
        if(op == 'M'){
            int x,a; cin >> x >> a;

            st.update(a, x);
        }
        else{
            int y,b; cin >> y >> b;

            cout << find_answer(b, y) << "\n";
        }
    }
}

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    #define name "InvMOD"
    if(fopen(name".INP", "r")){
        freopen(name".INP","r",stdin);
        freopen(name".OUT","w",stdout);
    }

    int t = 1; //cin >> t;
    while(t--) solve();
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

deda.cpp: In function 'int main()':
deda.cpp:107:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  107 |         freopen(name".INP","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
deda.cpp:108:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  108 |         freopen(name".OUT","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 140 / 140