제출 #1010046

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1010046		yeediot	Fire (BOI24_fire)	C++17	40 / 100	2071 ms	27204 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define F first
#define S second
#define all(x) x.begin(),x.end()
#define pii pair<int,int>
#define pb push_back
#define sz(x) (int)(x.size())
#define chmin(x,y) x=min(x,y)
#define chmax(x,y) x=max(x,y)
#define vi vector<int>
#define vp vector<pii>
#define vvi vector<vi>
#define ykh mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count())
#define __lg(x) 63-__builtin_clzll(x)
#define pow2(x) (1LL<<x)
void __print(int x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}

template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}
#ifdef local
void CHECK();
void setio(){
    freopen("/Users/iantsai/cpp/input.txt","r",stdin);
    freopen("/Users/iantsai/cpp/output.txt","w",stdout);
}
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
void setio(){}
#define debug(x...)
#endif
#define TOI_is_so_de ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);setio();
const int mxn = 4e5+5;
const int inf = 1e18;
int n, m, l[mxn], r[mxn], nxt[mxn];

signed main(){
    TOI_is_so_de;
    cin >> n >> m;
    for(int i=1;i<=n;i++){
        cin >> l[i] >> r[i];
        if(l[i] > r[i]) r[i] += m;
        l[i+n] = l[i] + m;
        r[i+n] = r[i] + m;
    }
    n *= 2;
    {
        vector<pii>temp;
        for(int i=1;i<=n;i++){
            temp.pb({l[i], -r[i]});
        }
        sort(all(temp));
        int cnt = 0, end = -1;
        for(auto [L, R] : temp){
            R = -R;
            if(R <= end){
                continue;
            }
            l[++cnt] = L;
            r[cnt] = R;
            end = R;
        }
        n = cnt;
    }
    {
        int id = 1;
        vector<pii>temp;
        for(int i=1;i<=n;i++){
            temp.pb({l[i], i});
        }
        sort(all(temp));
        for(int i=0;i<n;i++){
            while(id<n and temp[id].F <= r[temp[i].S]){
                id++;
            }
            nxt[temp[i].S] = temp[id-1].S;
        }
    }
    int ans = inf;
    for(int i=1;i<=n;i++){
        if(l[i] >= m) break;
        int cur = i, temp = 1;
        while(r[cur]-m<l[i]){
            if(nxt[cur] == cur){
                temp = inf;
                break;
            }
            cur = nxt[cur];
            temp++;
        }
        ans = min(ans, temp);
    }
    cout << (ans == inf ? -1 : ans) << '\n';
    #ifdef local
    CHECK();
    #endif
}
/*
input:
 dp[i] = 
*/
#ifdef local
void CHECK(){
    cerr << "\n[Time]: " << 1000.0 * clock() / CLOCKS_PER_SEC << " ms.\n";
     function<bool(string,string)> compareFiles = [](string p1, string p2)->bool {
         std::ifstream file1(p1);
         std::ifstream file2(p2);
         if (!file1.is_open() || !file2.is_open())return false;
         std::string line1, line2;
         while (getline(file1, line1) && getline(file2, line2)) {
             if (line1 != line2)return false;
         }
         int cnta=0,cntb=0;
         while(getline(file1,line1))cnta++;
         while(getline(file2,line2))cntb++;
         return cntb-cnta<=1;
     };
     bool check = compareFiles("output.txt","expected.txt");
     if (check) cerr<<"ACCEPTED\n";
     else cerr<<"WRONG ANSWER!\n";
}
#else
#endif



 

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'void setIO(std::string)':
Main.cpp:35:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:36:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 14 / 14
• Subtask 2: 17 / 17
• Subtask 3: 9 / 9
• Subtask 4: 0 / 13
• Subtask 5: 0 / 21
• Subtask 6: 0 / 26