Submission #258549

#TimeUsernameProblemLanguageResultExecution timeMemory
258549errorgornLucky Numbers (RMI19_lucky)C++14
28 / 100
1 ms512 KiB
//雪花飄飄北風嘯嘯 //天地一片蒼茫 #include <bits/stdc++.h> #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> #include <ext/rope> using namespace std; using namespace __gnu_pbds; using namespace __gnu_cxx; #define ll long long #define ii pair<ll,ll> #define iii pair<ii,ll> #define fi first #define se second #define endl '\n' #define debug(x) cout << #x << " is " << x << endl; #define rep(x,start,end) for(auto x=(start)-((start)>(end));x!=(end)-((start)>(end));((start)<(end)?x++:x--)) #define all(x) (x).begin(),(x).end() #define sz(x) (int)(x).size() ll MAX(ll a){return a;} ll MIN(ll a){return a;} template<typename... Args> ll MAX(ll a,Args... args){return max(a,MAX(args...));} template<typename... Args> ll MIN(ll a,Args... args){return min(a,MIN(args...));} #define indexed_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update> mt19937 rng(chrono::system_clock::now().time_since_epoch().count()); const int MOD=1000000007; int n,q; int arr[1005]; int memo[1005][2]; int dp(int i,int flag){ //prev is 1, flag=1, else flag=0 if (i==0) return 1; if (memo[i][flag]!=-1) return memo[i][flag]; int ans=0; rep(x,0,10){ if (flag && x==3) continue; ans=(ans+dp(i-1,x==1))%MOD; } return memo[i][flag]=ans; } int get(int l,int r){ int len=r-l; int ans=0; int flag=0; rep(x,l,r+1){ rep(y,0,arr[x]){ if (flag && y==3) continue; ans=(ans+dp(len,y==1))%MOD; } if (arr[x]==1) flag=1; else if (flag && arr[x]==3) return ans; else flag=0; len--; } return (ans+1)%MOD; } int main(){ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0); memset(memo,-1,sizeof(memo)); cin>>n>>q; string s; cin>>s; rep(x,0,n) arr[x]=s[x]-'0'; cout<<get(0,n-1)<<endl; int a,b; while (q--){ cin>>a; if (a==2){ cin>>a>>b; arr[a-1]=b; } else{ cin>>a>>b; cout<<get(a-1,b-1)<<endl; } } }
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