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19 lines
203 B
C++
19 lines
203 B
C++
#include <bits/stdc++.h>
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using namespace std;
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int main(){
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int m;
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int n;
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int a=0;
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cin >>m>>n;
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while(m<=n){
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if(m%7==0){
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a+=m;
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}
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m++;
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}
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cout <<a;
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return 0;
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}
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