제출 #321741

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
321741		zaneyu	이상한 기계 (APIO19_strange_device)	C++14	100 / 100	579 ms	70104 KiB

strange_device

/*input
3 1
*/
#include<bits/stdc++.h>
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
typedef tree<long long, null_type, less_equal<long long>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
#pragma GCC optimize("unroll-loops,no-stack-protector")
//order_of_key #of elements less than x
// find_by_order kth element
using ll = long long;
using ld = long double;
using pii = pair<int,int>;
#define f first
#define s second
#define pb push_back
#define REP(i,n) for(int i=0;i<n;i++)
#define REP1(i,n) for(int i=1;i<=n;i++)
#define FILL(n,x) memset(n,x,sizeof(n))
#define ALL(_a) _a.begin(),_a.end()
#define sz(x) (int)x.size()
#define SORT_UNIQUE(c) (sort(c.begin(),c.end()), c.resize(distance(c.begin(),unique(c.begin(),c.end()))))
const ll INF64=4e18;
const int INF=0x3f3f3f3f;
const ll MOD=1e9+7;
const ld PI=acos(-1);
const ld eps=1e-9;
#define lowb(x) x&(-x)
#define MNTO(x,y) x=min(x,(__typeof__(x))y)
#define MXTO(x,y) x=max(x,(__typeof__(x))y)
ll sub(ll a,ll b){
    ll x=a-b;
    while(x<0) x+=MOD;
    while(x>MOD) x-=MOD;
    return x;
}
ll mult(ll a,ll b){
    return a*b%MOD;
}
ll mypow(ll a,ll b){
    if(b<=0) return 1;
    ll res=1LL;
    while(b){
        if(b&1) res=(res*a)%MOD;
        a=(a*a)%MOD;
        b>>=1;
    }
    return res;
}
typedef pair<ll,ll> ii;

int n;
ll a, b, t;

vector<ii> p;

const ll MAXT = 1e18+18;

int main(){
    ios::sync_with_stdio(false),cin.tie(0);
    cin>>n>>a>>b;
    p.resize(n);
    for(int i=0;i<n;++i){
        cin>>p[i].f>>p[i].s;
    }
    a = a/__gcd(a, b+1);
    if(b>MAXT/a){ //every t has a distinct pair
        ll sol = 0;
        for(auto i:p){
            sol += i.second-i.first+1;
        }
        cout<<sol;
    }else{ //pairs repeat every t moments
        ll t = a*b;
        vector<ii> p2;
        for(auto i:p){
            if(i.first/t==i.second/t){
                p2.push_back(ii(i.first%t, i.second%t));
            }else if(i.first/t+1==i.second/t){
                p2.push_back(ii(i.first%t, t-1));
                p2.push_back(ii(0, i.second%t));
            }else{
                cout<<t;
                return 0;
            }
        }
        sort(p2.begin(), p2.end());
        ll s, e, sol=0;
        for(int i=0, j=0;i<p2.size();i=j){
            s=p2[i].first;e=p2[i].second;
            for(;j<p2.size() && p2[j].first<=e;++j){
                e=max(e, p2[j].second);
            }
            sol+=e-s+1;
        }
        cout<<sol;
    }

}

컴파일 시 표준 에러 (stderr) 메시지

strange_device.cpp: In function 'int main()':
strange_device.cpp:91:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   91 |         for(int i=0, j=0;i<p2.size();i=j){
      |                          ~^~~~~~~~~~
strange_device.cpp:93:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   93 |             for(;j<p2.size() && p2[j].first<=e;++j){
      |                  ~^~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 20 / 20
• Subtask 7: 20 / 20
• Subtask 8: 30 / 30