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1010.cpp
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49 lines (35 loc) ยท 680 Bytes
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//
// 1010.cpp
// algo
//
// Created by ๋ฐํจ์ on 2021/07/26.
//
#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
int dp[30][30];
int main(){
cin.tie(0);
cout.tie(0);
std::ios::sync_with_stdio(false);
//dp ์ด๊ธฐํ
for(int i=1;i<30;i++){
dp[1][i]=i;
}
for(int i=2;i<30;i++){
for(int j=i;j<30;j++){
for(int k=j;k>=i;k--){
dp[i][j]+=dp[i-1][k-1];
}
}
}
int n;
int a,b;
cin>>n;
for(int i=0;i<n;i++){
cin>>a>>b;
cout<<dp[a][b]<<"\n";
}
return 0;
}