https://acmicpc.net/problem/10810
#include <iostream>
#include <vector>
using namespace std;
int main(void){
ios::sync_with_stdio(0);
cin.tie(0);
int N,M,i,j,k;
cin>>N>>M;
vector<int>a(N);
for(int l=0;l<M;l++){
cin>>i>>j>>k;
i-=1;
j-=1;
for(int m=i;m<=j;m++){
a(m)=k;
}
}
for (int n=0;n<N;n++){
cout<<a(n)<<" ";
}
}