foo.cc: In function 'int main()':
foo.cc:22:4: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    if (ans[i][j]!=-1)
    ^~
foo.cc:24:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
     if (j>0 && ans[i][j-1]!=-1) ans[i][j] += ans[i][j-1];
     ^~
foo.cc:24:9: error: 'j' was not declared in this scope
     if (j>0 && ans[i][j-1]!=-1) ans[i][j] += ans[i][j-1];
         ^
foo.cc:24:20: error: 'i' was not declared in this scope
     if (j>0 && ans[i][j-1]!=-1) ans[i][j] += ans[i][j-1];
                    ^

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