Accepted
foo.cc: In function 'int main()': foo.cc:6:21: warning: unused variable 'ans' [-Wunused-variable] 6 | int m, n, i, j, k, ans; | ^~~
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foo.cc: In function 'int main()': foo.cc:6:21: warning: unused variable 'ans' [-Wunused-variable] 6 | int m, n, i, j, k, ans; | ^~~
[Hydro](https://hydro.ac)提供评测服务