foo.c: In function 'judge':
foo.c:14:52: warning: self-comparison always evaluates to false [-Wtautological-compare]
     else if (pep[i].w == pep[j].w) return pep[i].d < pep[i].d;
                                                    ^
foo.c: In function 'main':
foo.c:40:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &k);
     ^~~~~~~~~~~~~~~~~~~~~
foo.c:41:34: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
     for (int i = 0; i < 10; ++i) scanf("%d", &e[i]);
                                  ^~~~~~~~~~~~~~~~~~
foo.c:42:34: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
     for (int i = 0; i < n; ++i) {scanf("%d", &pep[i].w);pep[i].d = i + 1;}
                                  ^~~~~~~~~~~~~~~~~~~~~~

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