Submission #444237

#	Time	Username	Problem	Language	Result	Execution time	Memory
444237		qwerasdfzxcl	Strange Device (APIO19_strange_device)	C++14	15 / 100	586 ms	25252 KiB

strange_device

#include <bits/stdc++.h>

typedef __int128_t l128;
typedef long long ll;
using namespace std;


int main(){
    int n;
    ll x, y;
    scanf("%d %lld %lld", &n, &x, &y);
    l128 t = y;
    t *= x/__gcd(x, y+1);
    ll MOD = (ll)1e18+10;
    if (t<=(ll)1e18+10) MOD = t;
    //printf("%lld\n", MOD);

    vector<pair<ll, ll>> ran;
    for (int i=0;i<n;i++){
        ll tmp1, tmp2;
        scanf("%lld %lld", &tmp1, &tmp2);
        if (tmp2-tmp1+1>=MOD) {printf("%lld\n", MOD); return 0;}
        tmp2++;
        tmp1 %= MOD, tmp2 %= MOD;
        if (tmp2<tmp1){
            ran.emplace_back(tmp1, MOD);
            ran.emplace_back(0, tmp2);
        }
        else ran.emplace_back(tmp1, tmp2);
    }
    sort(ran.begin(), ran.end());
    ll ans = 0;
    pair<ll, ll> cur = {0, 0};
    n = ran.size();
    for (int i=0;i<n;i++){
        if (cur.first<=ran[i].first && ran[i].first<=cur.second){
            ans += ran[i].second-cur.second;
            cur.second = ran[i].second;
        }
        else{
            ans += ran[i].second-ran[i].first;
            cur = ran[i];
        }
    }
    printf("%lld\n", ans);
    return 0;
}

Compilation message (stderr)

strange_device.cpp: In function 'int main()':
strange_device.cpp:11:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |     scanf("%d %lld %lld", &n, &x, &y);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:21:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |         scanf("%lld %lld", &tmp1, &tmp2);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 5 / 5
• Subtask 3: 0 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20
• Subtask 8: 0 / 30