結果

問題 No.2100 [Cherry Alpha C] Two-way Steps
ユーザー woodywoodywoodywoody
提出日時 2022-10-15 16:05:10
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 214 ms / 2,000 ms
コード長 4,727 bytes
コンパイル時間 3,979 ms
コンパイル使用メモリ 237,640 KB
実行使用メモリ 27,300 KB
最終ジャッジ日時 2024-06-26 19:56:58
合計ジャッジ時間 11,303 ms
ジャッジサーバーID
(参考情報)
judge4 / judge5
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 2 ms
6,812 KB
testcase_01 AC 2 ms
6,812 KB
testcase_02 AC 2 ms
6,816 KB
testcase_03 AC 2 ms
6,940 KB
testcase_04 AC 165 ms
20,352 KB
testcase_05 AC 131 ms
16,128 KB
testcase_06 AC 23 ms
6,944 KB
testcase_07 AC 28 ms
7,552 KB
testcase_08 AC 156 ms
24,064 KB
testcase_09 AC 122 ms
14,336 KB
testcase_10 AC 61 ms
9,088 KB
testcase_11 AC 115 ms
17,280 KB
testcase_12 AC 87 ms
11,520 KB
testcase_13 AC 94 ms
18,688 KB
testcase_14 AC 73 ms
9,344 KB
testcase_15 AC 101 ms
18,304 KB
testcase_16 AC 82 ms
9,856 KB
testcase_17 AC 64 ms
16,256 KB
testcase_18 AC 95 ms
18,944 KB
testcase_19 AC 187 ms
24,064 KB
testcase_20 AC 40 ms
8,192 KB
testcase_21 AC 82 ms
12,160 KB
testcase_22 AC 77 ms
9,728 KB
testcase_23 AC 141 ms
21,120 KB
testcase_24 AC 207 ms
27,300 KB
testcase_25 AC 207 ms
27,136 KB
testcase_26 AC 206 ms
27,264 KB
testcase_27 AC 209 ms
27,240 KB
testcase_28 AC 208 ms
27,264 KB
testcase_29 AC 214 ms
27,264 KB
testcase_30 AC 208 ms
27,260 KB
testcase_31 AC 207 ms
27,260 KB
testcase_32 AC 209 ms
27,248 KB
testcase_33 AC 208 ms
27,152 KB
testcase_34 AC 111 ms
11,904 KB
testcase_35 AC 94 ms
12,288 KB
testcase_36 AC 94 ms
12,160 KB
testcase_37 AC 89 ms
11,648 KB
testcase_38 AC 103 ms
12,288 KB
testcase_39 AC 77 ms
10,496 KB
testcase_40 AC 77 ms
10,496 KB
testcase_41 AC 75 ms
10,624 KB
testcase_42 AC 77 ms
10,624 KB
testcase_43 AC 75 ms
10,880 KB
testcase_44 AC 116 ms
26,000 KB
testcase_45 AC 117 ms
25,856 KB
testcase_46 AC 115 ms
25,952 KB
testcase_47 AC 117 ms
25,984 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

// #define _GLIBCXX_DEBUG
#include<bits/stdc++.h>
#include<atcoder/all>
#define rep(i,b) for(int i=0;i<b;i++)
#define rrep(i,b) for(int i=b-1;i>=0;i--)
#define rep1(i,b) for(int i=1;i<b;i++)
#define repx(i,x,b) for(int i=x;i<b;i++)
#define rrepx(i,x,b) for(int i=b-1;i>=x;i--)
#define fore(i,a) for(auto i:a)
#define fore1(i,a) for(auto &i:a)
#define rng(x) (x).begin(), (x).end()
#define rrng(x) (x).rbegin(), (x).rend()
#define sz(x) ((int)(x).size())
#define pb push_back
#define fi first
#define se second
#define pcnt __builtin_popcountll

using namespace std;
using namespace atcoder;

using ll = long long;
using ld = long double;
template<typename T> using mpq = priority_queue<T, vector<T>, greater<T>>;
template<typename T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<typename T> bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }
template<typename T> ll sumv(const vector<T>&a){ll res(0);for(auto&&x:a)res+=x;return res;}
bool yn(bool a) { if(a) {cout << "Yes" << endl; return 1;} else {cout << "No" << endl; return 0;}}
#define dame { cout << "No" << endl; return 0;}
#define dame1 { cout << -1 << endl; return 0;}
#define test(x) cout << "test" << x << endl;
#define deb(x,y) cout << x << " " << y << endl;
#define debp(p) cout << p.fi << " " << p.se << endl;
#define deb3(x,y,z) cout << x << " " << y << " " << z << endl;
#define deb4(x,y,z,x2) cout << x << " " << y << " " << z << " " << x2 << endl;
#define out cout << ans << endl;
#define outd cout << fixed << setprecision(20) << ans << endl;
#define outm cout << ans.val() << endl;
#define outv fore(yans , ans) cout << yans << "\n";
#define outdv fore(yans , ans) cout << yans.val() << "\n";
#define show(x) cerr<<#x<<" = "<<x<<endl;
#define showdeb(x,y) cerr<<#x<<" = "<<x<<" : "<<#y<<" = "<<y<<endl;
#define showv(v) {fore(vy , v) {cout << vy << " ";} cout << endl;}
#define showv2(v) fore(vy , v) cout << vy << "\n";
#define showvm(v) {fore(vy , v) {cout << vy.val() << " ";} cout << endl;}
#define showvm2(v) fore(vy , v) cout << vy.val() << "\n";
using pll = pair<ll,ll>;using pil = pair<int,ll>;using pli = pair<ll,int>;using pii = pair<int,int>;using pdd = pair<ld,ld>;
using tp = tuple<int ,int ,int>;
using vi = vector<int>;using vd = vector<ld>;using vl = vector<ll>;using vs = vector<string>;using vb = vector<bool>;
using vpii = vector<pii>;using vpli = vector<pli>;using vpll = vector<pll>;using vpil = vector<pil>;
using vvi = vector<vector<int>>;using vvl = vector<vector<ll>>;using vvs = vector<vector<string>>;using vvb = vector<vector<bool>>;
using vvpii = vector<vector<pii>>;using vvpli = vector<vector<pli>>;using vvpll = vector<vpll>;using vvpil = vector<vpil>;
using mint = modint998244353;
using vm = vector<mint>;
using vvm = vector<vector<mint>>;
vector<int> dx={1,0,-1,0,1,1,-1,-1},dy={0,1,0,-1,1,-1,1,-1};
ll gcd(ll a, ll b) { return a?gcd(b%a,a):b;}
ll lcm(ll a, ll b) { return a/gcd(a,b)*b;}
#define yes {cout <<"Yes"<<endl;}
#define yesr { cout <<"Yes"<<endl; return 0;}
#define no {cout <<"No"<<endl;}
#define nor { cout <<"No"<<endl; return 0;}
const double eps = 1e-10;
const ll LINF = 1001002003004005006ll;
const int INF = 1001001001;

struct edge{
    int from,to;
    ll cost;

    edge(int from_=0,int to_=0,ll cost_=0) : from(from_),to(to_),cost(cost_) {}
};


void solve(){
    int n,m; cin>>n>>m;
    vl h(n);
    rep(i,n) cin>>h[i];

    vector<vector<edge>> e1(n),e2(n);

    rep(i,m){
        int a,b; cin>>a>>b;
        a--; b--;
        if (b < a) swap(a,b);
        e1[a].pb(edge(a,b,0));
        e2[b].pb(edge(b,a,0));
    }

    vvl dp(n,vl(2,-LINF));
    dp[0][0] = 0;

    rep(i,n){
        fore(y , e1[i]){
            int b = y.to;
            if (h[b] > h[i]){
                ll cp = h[b] - h[i];
                if (dp[i][0] != -LINF) chmax(dp[b][1] , dp[i][0] + cp);
            }else{
                if (dp[i][0] != -LINF) chmax(dp[b][0] , dp[i][0]);
                if (dp[i][1] != -LINF) chmax(dp[b][0] , dp[i][1]);
            }
        }
    }

    ll ans = max(dp[n-1][0] , dp[n-1][1]);
    if (ans == -LINF) cout << -1 << endl;
    else out;

    vvl dp2(n,vl(2,-LINF));
    dp2[n-1][0] = 0;

    rrep(i,n){
        fore(y , e2[i]){
            int b = y.to;
            if (h[b] > h[i]){
                ll cp = h[b] - h[i];
                if (dp2[i][0] != -LINF) chmax(dp2[b][1] , dp2[i][0] + cp);
            }else{
                if (dp2[i][0] != -LINF) chmax(dp2[b][0] , dp2[i][0]);
                if (dp2[i][1] != -LINF) chmax(dp2[b][0] , dp2[i][1]);
            }
        }
    }

    ans = max(dp2[0][0] , dp2[0][1]);
    if (ans == -LINF) cout << -1 << endl;
    else out;
    
}

int main(){

    solve();

    return 0;
}
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