(B)Yet Another Meme Problem
topic
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Ideas: Find the 9,99,999,999 b .. . . These smaller than the number of b, then multiplying the line. . .
#include<bits/stdc++.h> using namespace std; int main() { //freopen("text","r",stdin); int T; scanf("%d",&T); while(T--) { long long a,b; cin>>a>>b; if(b<9) printf("0\n"); else{ if(b<99) cout<<a<<endl; else if(b<999) cout<<a*2<<endl; else if(b<9999) cout<<a*3<<endl; else if(b<99999) cout<<a*4<<endl; else if(b<999999) cout<<a*5<<endl; else if(b<9999999) cout<<a*6<<endl; else if(b<99999999) cout<<a*7<<endl; else if(b<999999999) cout<<a*8<<endl; else cout<<a*9<<endl; } } return 0; }