#include<bits/stdc++.h>
using namespace std;
const int N = 1e5 + 1;
template<typename T>
inline void read(T &x){
    x = 0;
    char c = getchar();
    int f = 1;
    while(!isdigit(c)){if(c ==  '-') f = -1; c = getchar();}
    while(isdigit(c)){x = (x << 1) + (x << 3) + (c - '0'); c = getchar();}
    x = x * f;
}
template<typename T, typename ...T1>
inline void read(T&x, T1& ...x1){
    read(x);
    read(x1...);
}
int main(){int a, b, c;
    read(a, b, c, ...);
    cout <<a + b + c + ...;
}