quality.cpp: In function 'bool binar(std::vector<std::vector<int> >, std::vector<std::vector<int> >, int, int, int, int, int)':
quality.cpp:40:32: warning: value computed is not used [-Wunused-value]
40 | if (i==0&&o==0) pref [i][o]==B[i][o];
quality.cpp:41:48: warning: value computed is not used [-Wunused-value]
41 | else if (i==0&&o>0) pref [i][o]==B[i][o]+pref[i][o-1];
| ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
quality.cpp:42:48: warning: value computed is not used [-Wunused-value]
42 | else if (i>0&&o==0) pref [i][o]==B[i][o]+pref[i-1][o];
| ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccFDVtGA.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccIJy59w.o:quality.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccFDVtGA.o: in function `main':
grader.cpp:(.text.startup+0xe9): undefined reference to `rectangle(int, int, int, int, int (*) [3001])'
collect2: error: ld returned 1 exit status