func_code_string: #include <bits/stdc++.h>   #pragma GCC optimize( Ofast )   #pragma GCC optimize( no-stack-protector )   #pragma GCC target( sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native )   #pragma GCC optimize( unroll-loops )   using namespace std;   void seriy() {     cin.tie(0);     cout.tie(0);   }   signed main() {     seriy();     long long n, m;     cin >> n >> m;     long long mn = 2e9 + 8;     for (long long i = 0; i < m; i++) {       long long l, r;       cin >> l >> r;       mn = min(mn, r - l + 1);     }     cout << mn << endl;     vector<long long> ans(n);     for (long long i = 0; i < n; i++) {       ans[i] = i % mn;     }     for (auto i : ans) cout << i <<    ;     return 0;   }   