#include <iostream>
#include <vector>
#include <iomanip>
#include <algorithm>
#include <map>
#include <cmath>
#include <bitset>
#include <string>
#include <queue>
using namespace std;

int main(){
    int n,m;
    cin >> n >> m;
    vector<long long> h(n);
    for(int i=0;i<n;i++) cin >> h[i];
    vector<vector<int>> list(n);

    for(int i=0;i<m;i++){
        int x,y;cin >> x >> y;
        x--;y--;
        list[x].push_back(y);
        list[y].push_back(x);
    }

    vector<vector<long long>> dp(2,vector<long long>(n,-1));
    dp[0][0]=0;
    dp[1][0]=0;
    for(int i =0;i<n;i++){
        if(dp[0][i]!=-1){
            for(auto x:list[i]){
                if(x<i) continue;
                if(h[x]<h[i]) dp[1][x] = max(dp[1][x],dp[0][i]);
            }
        }
        if(dp[1][i]!=-1){
            for(auto x:list[i]){
                if(x<i) continue;
                if(h[i]<h[x]) dp[0][x] = max(dp[0][x],dp[1][i]+h[x]-h[i]);
                if(h[x]<h[i]) dp[1][x] = max(dp[1][x],dp[1][i]);
            }
        }
    }
    cout << max(dp[0][n-1],dp[1][n-1]) << endl;

    dp.clear();
    dp.resize(2);
    dp[0].resize(n,-1);
    dp[1].resize(n,-1);
    dp[0][n-1]=0;
    dp[1][n-1]=0;
    for(int i =n-1;0<=i;i--){
        if(dp[0][i]!=-1){
            for(auto x:list[i]){
                if(i<x) continue;
                if(h[x]<h[i]) dp[1][x] = max(dp[1][x],dp[0][i]);
            }
        }
        if(dp[1][i]!=-1){
            for(auto x:list[i]){
                if(i<x) continue;
                if(h[i]<h[x]) dp[0][x] = max(dp[0][x],dp[1][i]+h[x]-h[i]);
                if(h[x]<h[i]) dp[1][x] = max(dp[1][x],dp[1][i]);
            }
        }
    }
    cout << max(dp[0][0],dp[1][0]) << endl;
}