#include <bits/stdc++.h>
using namespace std;
#define LL long long
#define F first
#define S second
#define pii pair<int,int>
#define piii pair<pair<int,int>,int>
const int N = 1e6+10;
const int M = 200;
const LL INF = 1e9;
const LL LINF = 2e18;
const LL MOD = 1e9+7;
const double PI = 3.141592653589793;
pair<LL,LL>p[N];
vector<pair<LL,LL>>vec;
struct node{
node *l,*r;
LL sum = 0;
int lazy = 0;
node():l(NULL),r(NULL){};
};
void push(node * &v,LL tl,LL tr){
if(v==NULL||!v->lazy)return ;
v->sum = tr-tl+1;
if(tl!=tr){
if(v->l==NULL)v->l = new node();
if(v->r==NULL)v->r = new node();
v->l->lazy = 1;
v->r->lazy = 1;
}
v->lazy = 0;
}
void update(node * &v,LL tl,LL tr,LL l,LL r){
push(v,tl,tr);
if(tl>r||tr<l)
return ;
if(v==NULL) v = new node();
if(tl>=l&&tr<=r){
v->lazy = 1;
push(v,tl,tr);
return ;
}
LL mid = (tl+tr)/2;
update(v->l,tl,mid,l,r);
update(v->r,mid+1,tr,l,r);
v->sum = (v->l==NULL?0:v->l->sum)+(v->r==NULL?0:v->r->sum);
}
node *root;
int main(){
//freopen("out.txt","w",stdout);
LL n,a,b,Len;
scanf("%lld%lld%lld",&n,&a,&b);
if(log(a)+log(b)>=log(LLONG_MAX))
Len = LINF;
else
Len = a*b;
bool q = 0;
for(int i=1;i<=n;i++){
scanf("%lld%lld",&p[i].F,&p[i].S);
q |= p[i].S-p[i].F+1>=Len;
p[i].F %= Len;p[i].S %= Len;
if(p[i].S>=p[i].F)
vec.push_back({p[i].F,p[i].S});
else
vec.push_back({p[i].F,Len-1}),vec.push_back({0,p[i].S});
}
sort(vec.begin(),vec.end());
LL l = 0,r = -1,ans = 0;
vec.push_back({LINF,LINF});
for(int i=0;i<vec.size();i++){
if(vec[i].F>r)
ans += r-l+1,l = vec[i].F,r = vec[i].S;
else
r = vec[i].S;
}
assert(!q);
printf("%lld\n",q?Len:ans);
}
Compilation message
strange_device.cpp: In function 'int main()':
strange_device.cpp:98:18: 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]
98 | for(int i=0;i<vec.size();i++){
| ~^~~~~~~~~~~
strange_device.cpp:72:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
72 | scanf("%lld%lld%lld",&n,&a,&b);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:82:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
82 | scanf("%lld%lld",&p[i].F,&p[i].S);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
2 ms |
460 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
2 ms |
460 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
2 ms |
460 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
2 ms |
460 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
2 ms |
460 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
2 ms |
460 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
2 ms |
460 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
2 ms |
460 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
