#include<bits/stdc++.h> using namespace std; int a[210],b[210]; int n,m; int main() { cin>>n>>m; for(int i=1;i<=n;i++){ cin>>a[i]; } while(m--){ int l,r,z; cin>>l>>r>>z; b[l]+=z; b[r+1]-=z; } int mi=9999999; for(int i=1;i<=n;i++){ b[i]+=b[i-1]; a[i]+=b[i]; mi=min(mi,a[i]); } cout<<mi; return 0; }