#include <stdio.h>

void solve(const char* input_file_name, const char* output_file_name){
	FILE* ifp;
	ifp = fopen(input_file_name, "r");
	int n, sum;
	while(fscanf(ifp, "%d", &n) != EOF){
		sum += n;
	}
	fclose(ifp);
	
	FILE* ofp;
	ofp = fopen(output_file_name, "w");
	fprintf(ofp, "%d", sum);
	fclose(ofp);
}

int main(){
	solve("adunare.in", "adunare.out");
	return 0;
}