Submission #317791

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
317791	2020-10-30 11:37:41	tjdgus4384	Strange Device (APIO19_strange_device)	C++14	15 / 100	57 ms	4108 KiB

strange_device

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#include<bits/stdc++.h>
using namespace std;
long long A, B, l[100001], r[100001];
vector<pair<long long, long long> > v;
int n;
int main(){
    scanf("%d %lld %lld", &n, &A, &B);
    for(int i = 0;i < n;i++){
        scanf("%lld %lld", &l[i], &r[i]);
    }
    long long g = __gcd((B+1)%A, A), t;
    bool chk = false;
    if(log10(A/g) + log10(B) > 18.7) chk = true;
    else t = (A/g) * B;
    for(int i = 0;i < n;i++){
        if(chk){
            v.push_back({l[i], r[i]});
            continue;
        }
        if((r[i] - l[i] + 1) >= t){
            printf("%lld", t);
            return 0;
        }
        l[i] %= t;
        r[i] %= t;
        if(r[i] < l[i]){
            v.push_back({l[i], t-1});
            v.push_back({0, r[i]});
        }
 
 
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Compilation message (stderr)

strange_device.cpp: In function 'int main()':
strange_device.cpp:35:21: 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]
   35 |     for(int i = 1;i < v.size();i++){
      |                   ~~^~~~~~~~~~
strange_device.cpp:8:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    8 |     scanf("%d %lld %lld", &n, &A, &B);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:10:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   10 |         scanf("%lld %lld", &l[i], &r[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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