molecules.cpp: In function 'int main()':
molecules.cpp:33:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
33 | scanf("%d%d%d", &n, &l, &u);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~
molecules.cpp:36:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
36 | scanf("%d", &i);
| ~~~~~^~~~~~~~~~
/usr/bin/ld: /tmp/cceEandW.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccMAhWEU.o:molecules.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status