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#include <stdio.h>
int main(int argc, char **argv) {
int buf;
int acc;
int err;
for(int i=1;i<argc;i++) {
err=sscanf(argv[i], "%i", &buf);
if(err!=1) {
fprintf(stderr, "sscanf error: not an integer.\n");
return 1;
return 0;