Submission #3373938
Source Code Expand
#include<bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(int)n;i++)
#define all(c) (c).begin(),(c).end()
#define pb push_back
#define dbg(...) do{cerr<<__LINE__<<": ";dbgprint(#__VA_ARGS__, __VA_ARGS__);}while(0);
using namespace std;
namespace std{template<class S,class T>struct hash<pair<S,T>>{size_t operator()(const pair<S,T>&p)const{return ((size_t)1e9+7)*hash<S>()(p.first)+hash<T>()(p.second);}};template<class T>struct hash<vector<T>>{size_t operator()(const vector<T> &v)const{size_t h=0;for(auto i : v)h=h*((size_t)1e9+7)+hash<T>()(i)+1;return h;}};}
template<class T>ostream& operator<<(ostream &os, const vector<T> &v){os<<"[ ";rep(i,v.size())os<<v[i]<<(i==v.size()-1?" ]":", ");return os;}template<class T>ostream& operator<<(ostream &os,const set<T> &v){os<<"{ "; for(const auto &i:v)os<<i<<", ";return os<<"}";}
template<class T,class U>ostream& operator<<(ostream &os,const map<T,U> &v){os<<"{";for(const auto &i:v)os<<" "<<i.first<<": "<<i.second<<",";return os<<"}";}template<class T,class U>ostream& operator<<(ostream &os,const pair<T,U> &p){return os<<"("<<p.first<<", "<<p.second<<")";}
void dbgprint(const string &fmt){cerr<<endl;}template<class H,class... T>void dbgprint(const string &fmt,const H &h,const T&... r){cerr<<fmt.substr(0,fmt.find(","))<<"= "<<h<<" ";dbgprint(fmt.substr(fmt.find(",")+1),r...);}
typedef long long ll;typedef vector<int> vi;typedef pair<int,int> pi;const int inf = (int)1e9;const double INF = 1e12, EPS = 1e-9;
ll solve(int n, ll c, vector<ll> &x, vector<ll> &v){
vector<ll> mx(n + 1);
rep(i, n){
mx[i + 1] = mx[i] + v[i] - x[i] + (i ? x[i - 1] : 0ll);
}
rep(i, n) mx[i + 1] = max(mx[i + 1], mx[i]);
ll ans = mx[n], sum = 0;
for(int i = n - 1; i >= 0; i--){
sum += v[i] - 2 * ((i == n - 1 ? c : x[i + 1]) - x[i]);
ans = max(ans, mx[i] + sum);
}
return ans;
}
int main(){
cin.tie(0); cin.sync_with_stdio(0);
int n; ll c; cin >> n >> c;
vector<ll> x(n), v(n);
rep(i, n) cin >> x[i] >> v[i];
ll ans = 0;
rep(it, 2){
ans = max(ans, solve(n, c, x, v));
reverse(all(x));
reverse(all(v));
rep(i, n) x[i] = c - x[i];
}
cout << ans << endl;
return 0;
}
Submission Info
Submission Time |
|
Task |
D - Static Sushi |
User |
nadeko |
Language |
C++14 (GCC 5.4.1) |
Score |
500 |
Code Size |
2177 Byte |
Status |
AC |
Exec Time |
25 ms |
Memory |
2688 KB |
Judge Result
Set Name |
Sample |
Subtask1 |
Subtask2 |
Score / Max Score |
0 / 0 |
300 / 300 |
200 / 200 |
Status |
|
|
|
Set Name |
Test Cases |
Sample |
a01, a02, a03, a04 |
Subtask1 |
a01, a02, a03, a04, b05, b06, b07, b08, b09, b10, b11, b12, b13, b14, b15, b16, b17, b18, b19, b20, b21, b22, b23, b24, b25, b26, b27, b28, b29 |
Subtask2 |
a01, a02, a03, a04, b05, b06, b07, b08, b09, b10, b11, b12, b13, b14, b15, b16, b17, b18, b19, b20, b21, b22, b23, b24, b25, b26, b27, b28, b29, c30, c31, c32, c33, c34, c35, c36, c37, c38, c39, c40, c41, c42, c43, c44, c45, c46, c47, c48, c49, c50 |
Case Name |
Status |
Exec Time |
Memory |
a01 |
AC |
1 ms |
256 KB |
a02 |
AC |
1 ms |
256 KB |
a03 |
AC |
1 ms |
256 KB |
a04 |
AC |
1 ms |
256 KB |
b05 |
AC |
1 ms |
256 KB |
b06 |
AC |
1 ms |
256 KB |
b07 |
AC |
1 ms |
256 KB |
b08 |
AC |
1 ms |
256 KB |
b09 |
AC |
1 ms |
256 KB |
b10 |
AC |
1 ms |
256 KB |
b11 |
AC |
1 ms |
256 KB |
b12 |
AC |
1 ms |
256 KB |
b13 |
AC |
1 ms |
256 KB |
b14 |
AC |
1 ms |
256 KB |
b15 |
AC |
1 ms |
256 KB |
b16 |
AC |
1 ms |
256 KB |
b17 |
AC |
1 ms |
256 KB |
b18 |
AC |
1 ms |
256 KB |
b19 |
AC |
1 ms |
256 KB |
b20 |
AC |
1 ms |
256 KB |
b21 |
AC |
1 ms |
256 KB |
b22 |
AC |
1 ms |
256 KB |
b23 |
AC |
1 ms |
256 KB |
b24 |
AC |
1 ms |
256 KB |
b25 |
AC |
1 ms |
256 KB |
b26 |
AC |
1 ms |
256 KB |
b27 |
AC |
1 ms |
256 KB |
b28 |
AC |
1 ms |
256 KB |
b29 |
AC |
1 ms |
256 KB |
c30 |
AC |
16 ms |
2672 KB |
c31 |
AC |
21 ms |
2672 KB |
c32 |
AC |
25 ms |
2672 KB |
c33 |
AC |
25 ms |
2672 KB |
c34 |
AC |
25 ms |
2672 KB |
c35 |
AC |
16 ms |
2672 KB |
c36 |
AC |
25 ms |
2672 KB |
c37 |
AC |
24 ms |
2672 KB |
c38 |
AC |
24 ms |
2672 KB |
c39 |
AC |
25 ms |
2688 KB |
c40 |
AC |
24 ms |
2672 KB |
c41 |
AC |
24 ms |
2672 KB |
c42 |
AC |
24 ms |
2672 KB |
c43 |
AC |
3 ms |
512 KB |
c44 |
AC |
24 ms |
2672 KB |
c45 |
AC |
1 ms |
256 KB |
c46 |
AC |
24 ms |
2672 KB |
c47 |
AC |
1 ms |
256 KB |
c48 |
AC |
24 ms |
2672 KB |
c49 |
AC |
24 ms |
2672 KB |
c50 |
AC |
24 ms |
2672 KB |