traffic.cpp: In function 'int main()':
traffic.cpp:54:9: warning: variable 'sol' set but not used [-Wunused-but-set-variable]
54 | int sol = 0;
| ^~~
traffic.cpp: In function 'void setIO(std::string)':
traffic.cpp:19:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
19 | freopen((name+".in").c_str(), "r", stdin); // see /general/io
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
traffic.cpp:20:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
20 | freopen((name+".out").c_str(), "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccOnAMtd.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccgNjbjg.o:traffic.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccOnAMtd.o: in function `main':
grader.cpp:(.text.startup+0xe1): undefined reference to `LocateCentre(int, int*, int*, int*)'
collect2: error: ld returned 1 exit status